72 files changed, 2868 insertions, 293 deletions

diff --git a/MCServer/Plugins/APIDump/APIDesc.lua b/MCServer/Plugins/APIDump/APIDesc.lua
index 1423d64bc..40bfe79ac 100644
--- a/MCServer/Plugins/APIDump/APIDesc.lua
+++ b/MCServer/Plugins/APIDump/APIDesc.lua
@@ -1969,7 +1969,7 @@ cPluginManager.AddHook(cPluginManager.HOOK_CHAT, OnChatMessage);
 				BroadcastChatSuccess = { Params = "Message", Return = "", Notes = "Prepends Green [INFO] / colours entire text (depending on ShouldUseChatPrefixes()) and broadcasts message. For success messages." },
 				BroadcastChatWarning = { Params = "Message", Return = "", Notes = "Prepends Rose [WARN] / colours entire text (depending on ShouldUseChatPrefixes()) and broadcasts message. For concerning events, such as plugin reload etc." },
 				CreateAndInitializeWorld = { Params = "WorldName", Return = "{{cWorld|cWorld}}", Notes = "Creates a new world and initializes it. If there is a world whith the same name it returns nil." },
-				FindAndDoWithPlayer = { Params = "PlayerName, CallbackFunction", Return = "", Notes = "Calls the given callback function for the given player." },
+				FindAndDoWithPlayer = { Params = "PlayerName, CallbackFunction", Return = "", Notes = "Calls the given callback function for all players with names partially (or fully) matching the name string provided." },
 				ForEachPlayer = { Params = "CallbackFunction", Return = "", Notes = "Calls the given callback function for each player. The callback function has the following signature: <pre class=\"prettyprint lang-lua\">function Callback({{cPlayer|cPlayer}})</pre>" },
 				ForEachWorld = { Params = "CallbackFunction", Return = "", Notes = "Calls the given callback function for each world. The callback function has the following signature: <pre class=\"prettyprint lang-lua\">function Callback({{cWorld|cWorld}})</pre>" },
 				GetCraftingRecipes = { Params = "", Return = "{{cCraftingRecipe|cCraftingRecipe}}", Notes = "Returns the CraftingRecipes object" },
diff --git a/MCServer/furnace.txt b/MCServer/furnace.txt
index 31d265ce7..1e98583ba 100644
--- a/MCServer/furnace.txt
+++ b/MCServer/furnace.txt
@@ -61,18 +61,30 @@
 #--------------------------
 # Fuels
 
-! 263:1    = 1600   # 1 Coal           -> 80 sec
-! 263:1:1  = 1600   # 1 Charcoal       -> 80 sec
-! 42:126:1 = 150    # 1 Halfslab       -> 7.5 seconds
-! 5:1      = 300    # 1 Planks         -> 15 sec
-! 280:1    = 100    # 1 Stick          -> 5 sec
-! 85:1     = 300    # 1 Fence          -> 15 sec
-! 53:1     = 300    # 1 Wooden Stairs  -> 15 sec
-! 58:1     = 300    # 1 Crafting Table -> 15 sec
-! 47:1     = 300    # 1 Bookshelf      -> 15 sec
-! 54:1     = 300    # 1 Chest          -> 15 sec
-! 84:1     = 300    # 1 Jukebox        -> 15 sec
-! 327:1    = 200000 # 1 Lava Bucket    -> 1000 sec
-! 17:1     = 300    # 1 Wood           -> 15 sec
-! 6:1      = 100    # 1 Sapling        -> 5 sec
-! 173:1    = 7400   # 1 Coal Block     -> 370 sec, based on https://github.com/minetest/common/commit/e0f5a6fd6936052756e27a05a2bfdd6aa86b38e1 which is a clone of MC
\ No newline at end of file
+! 263:1    = 1600   # 1 Coal            -> 80 sec
+! 263:1:1  = 1600   # 1 Charcoal        -> 80 sec
+! 126:1    = 15     # 1 Halfslab        -> 7.5 sec
+! 5:1      = 300    # 1 Planks          -> 15 sec
+! 280:1    = 100    # 1 Stick           -> 5 sec
+! 85:1     = 300    # 1 Fence           -> 15 sec
+! 53:1     = 300    # 1 Wooden Stairs   -> 15 sec
+! 58:1     = 300    # 1 Crafting Table  -> 15 sec
+! 47:1     = 300    # 1 Bookshelf       -> 15 sec
+! 54:1     = 300    # 1 Chest           -> 15 sec
+! 84:1     = 300    # 1 Jukebox         -> 15 sec
+! 327:1    = 20000  # 1 Lava Bucket     -> 1000 sec
+! 17:1     = 300    # 1 Wood            -> 15 sec
+! 6:1      = 100    # 1 Sapling         -> 5 sec
+! 173:1    = 16000  # 1 Coal Block      -> 800 sec
+! 369:1    = 2400   # 1 Blaze Rod       -> 120 sec
+! 25:1     = 300    # 1 Note Block      -> 15 sec
+! 151:1    = 300    # 1 Daylight Sensor -> 15 sec
+! 107:1    = 300    # 1 Fence Gate      -> 15 sec
+! 167:1    = 300    # 1 Trapdoor        -> 15 sec
+! 146:1    = 300    # 1 Trapped Chest   -> 15 sec
+! 72:1     = 300    # 1 Pressure Plate  -> 15 sec
+! 270:1    = 200    # 1 Wooden Pickaxe  -> 10 sec
+! 271:1    = 200    # 1 Wooden Axe      -> 10 sec
+! 269:1    = 200    # 1 Wooden Shovel   -> 10 sec
+! 290:1    = 200    # 1 Wooden Hoe      -> 10 sec
+! 268:1    = 200    # 1 Wooden Sword    -> 10 sec
diff --git a/Tools/MCADefrag/Globals.h b/Tools/MCADefrag/Globals.h
index f70a90d17..6593187e6 100644
--- a/Tools/MCADefrag/Globals.h
+++ b/Tools/MCADefrag/Globals.h
@@ -240,6 +240,7 @@ template <typename Type> class cItemCallback
 public:
 	/// Called for each item in the internal list; return true to stop the loop, or false to continue enumerating
 	virtual bool Item(Type * a_Type) = 0;
+	virtual ~cItemCallback() {};
 } ;
 
 
diff --git a/docs/Generator.html b/docs/Generator.html
index f6e7f1cd9..90a92c553 100644
--- a/docs/Generator.html
+++ b/docs/Generator.html
@@ -19,6 +19,8 @@ with specific implementation notes regarding MCServer.</p>
 <li><a href="#heightgen">Terrain height</a></li>
 <li><a href="#compositiongen">Terrain composition</a></li>
 <li><a href="#finishgen">Finishers</a></li>
+<li><a href="#makefaster">Making it all faster</a></li>
+<li><a href="#GPU">Executing on a GPU</a></li>
 </ul>
 </p>
 
@@ -304,16 +306,224 @@ using the same approach as in MultiStepMap - by using a thresholded 2D Perlin no
 <hr />
 
 <a name="heightgen"><h2>Terrain height</h2></a>
+<p>As with biomes, the easiest way to generate terrain height is not generating at all - assigning a constant
+height value to all columns. This is again useful either for internal tests, and for worlds like MineCraft's
+Flat world.</p>
+
+<p>For a somewhat more realistic landscape, we will employ the good old 2D Perlin noise. We can use it
+directly as a heightmap - each value we get from the noise is stretched into the desired range (usually from
+40 to 120 blocks for regular MineCraft worlds) and used as the height value. However, this doesn't play too
+well with the biomes we've just generated. If the biome says "ocean" and the Perlin noise says "mountain",
+the end result will be unpleasant.</p>
+
+<p>So we want a height generator that is biome-aware. The easiest way of doing this is to have a separate
+generator for each biome. Simply use the biome map to select which generator to use, then ask the appropriate
+generator for the height value. Again, this doesn't work too well - imagine an ExtremeHills biome right next
+to an Ocean biome. If no extra care is taken, the border between these two will be a high wall. The following
+image shows a 2D representation (for simplification purposes) of the problem:</p>
+<img src="img/biomeheights.jpg" />
+
+<p>This requires some further processing. What we need is for the terrain height to be dependent not only on
+the immediate biome for that column, but also on the close surroundings of the column. This is exactly the
+kind of task that averaging is designed for. If we take the area of 9x9 biomes centered around the queried
+column, generate height for each of the biomes therein, sum them up and divide by 81 (the number of biomes
+summed), we will be effectively making a 9-long running average over the terrain, and all the borders will
+suddenly become smooth. The following image shows the situation from the previous paragraph after applying
+the averaging process: </p>
+<img src="img/biomeheightsavg.jpg" />
+
+<p>The approach used in MCServer's Biomal generator is based on this idea, with two slight modifications.
+Instead of using a separate generator for each biome, one generator is used with a different set of input
+parameters for each biomes. These input parameters modify the overall amplitude and frequency of the Perlin
+noise that the generator produces, thus modifying the final terrain with regards to biomes. Additionally, the
+averaging process is weighted - columns closer to the queried column get a more powerful weight in the sum
+than the columns further away. The following image shows the output of MCServer's Biomal terrain height
+generator (each block type represents a different biome - ocean in the front (stone), plains and ice plains
+behind it (lapis, whitewool), extreme hills back right (soulsand), desert hills back left (mossy
+cobble)):</p>
+<a name="biomalheights"><img src="img/biomalheights.jpg" /></a>
+
+<p>One key observation about this whole approach is that in order for it to work, the biomes must be
+available for columns outside the currently generated chunk, otherwise the columns at the chunk's edge would
+not be able to properly average their height. This requirement can be fulfilled only by biome generators that
+adhere to the second <a href="#expectedproperties">Expected property</a> - that re-generating will produce
+the same data. If the biome generator returned different data for the same chunk each time it was invoked, it
+would become impossible to apply the averaging.</p>
+
+<p>(TODO: height with variations (N/A in MCS yet)</p>
 
 
 <hr />
 
 <a name="compositiongen"><h2>Terrain composition</h2></a>
+<p>As with the other generators, the composition generator category has its easy and debugging items, too.
+There's the "special" composition of "all the blocks are the same type", which fills the entire column, from
+the bottom to the height, with a single blocktype. This generator is useful when testing the generators in
+the other categories, to speed up the generation by leaving out unnecessary calculations. Another special
+compositor is a similar one, that fills all blocks with the same type, but the type varies for each biome.
+This way it's easy to see the generated biomes and possibly the heights for those biomes, as shown in the
+previous section on the <a href="#biomalheights">height averaging screenshot</a>.</p>
+
+<p>For a natural look, we need to put together a more complicated algorithm. The standard set forth in
+MineCraft is that the top of the world is covered in grass, then there are a few blocks of dirt and finally
+stone. This basic layout is then varied for different biomes - deserts have sand and sandstone instead of the
+grass and dirt layer. Mushroom biomes have mycelium in place of the grass. This per-biome dependency is
+trivial to implement - when compositing, simply use the appropriate layout for the column's biome.</p>
+
+<p>The next change concerns oceans. The generated heightmap doesn't include any waterlevel indication
+whatsoever. So it's up to the terrain compositor to actually decide where to place water. We do this by
+configuration - simply have a value in the config file specifying the sealevel height. The compositor then
+has to add water above any column which has a height lower than that. Additionally, the water needs to
+override per-biome layout selection - we don't want grass blocks to generate under water when the terrain
+height in the plains biome drops below the sealevel accidentally.</p>
+
+<p>The final feature in the compositor is the decision between multiple composition layouts within a single
+biome. A megataiga biome contains patches of non-grass dirt and podzol blocks, and the ocean floor can be
+made of dirt, gravel, sand or clay. A simple 2D Perlin noise can be used to select the layout to use for a
+specific column - simply threshold the noise's value by as many thresholds as there are layout variations,
+and use the layout corresponding to the threshold:</p>
+<img src="img/perlincompositor1.jpg" />
+<img src="img/perlincompositor2.jpg" />
+<img src="img/perlincompositor3.jpg" />
+
+<h3>Nether composition</h3>
+<p>So far we've been discussing only the Overworld generator. But MineCraft contains more than that. The
+Nether has a completely different look and feel, and quite different processes are required to generate that.
+Recall that MineCraft's Nether is 128 blocks high, with bedrock both at the top and the bottom. Between these
+two, the terrain looks more like a cavern than a surface. Not surprisingly, the Nether doesn't need a
+complicated height generator, it can use the flat height. However, the terrain composition must take an
+altogether different approach.</p>
+
+<p>The very first idea is to use the Perlin noise, but generate it in 3D, rather than 2D. Then, for each
+block, evaluate the noise value, if below 0, make it air, if not, make it netherrack.
+
+<p>To make it so that the bedrock at the top and at the bottom is never revealed, we can add a value
+increasing the more the Y coord gets towards the bottom or the top. This way the thresholding then guarantees
+that there will be no air anywhere near the bedrock.</p>
+
+<p>(TODO)</p>
 
 
 <hr />
 
 <a name="finishgen"><h2>Finishers</h2></a>
+<p>Finishers are a vast category of various additions to the terrain generator. They range from very easy
+ones, such as generating snow on top of the terrain in cold biomes, through medium ones, such as growing
+patches of flowers, complicated ones, such as placing trees and generating caves, all the way to very
+complicated ones such as villages and nether fortresses. There is no formal distinction between all these
+"categories", the only thing they have in common is that they take a chunk of blocks and modify it in some
+way.</p>
+
+<h3>Snow</h3>
+<p>Snow is probably the easiest of the finishers. It generates a block of snow on top of each block that is
+on top of the terrain and is not marked as non-snowable. It checks the chunk's heightmap to determine the top
+block, then checks whether the block supports snow on its top. Rails, levers and tall grass don't support
+snow, for example.</p>
+
+<h3>Ice</h3>
+<p>Another example of an easy finisher. This scans through the world and turn each water block on the surface
+into an ice block if the biome is cold. This means that any water block that is under any kind of other
+block, such as under a tree's leaves, will still stay water. Thus an additional improvement could be made by
+scanning down from the surface block through blocks that we deem as non-surface, such as leaves, torches,
+ladders, fences etc. Note that MCServer currently implements only the easy solution.</p>
+
+<h3>Bottom lava</h3>
+<p>Most worlds in MineCraft have lava lakes at their bottom. Generating these is pretty straightforward: Use
+the user-configured depth and replace all the air blocks below this depth with lava blocks. Note however,
+that this makes this generator dependent on the order in which the finishers are applied. If the mineshafts
+generate before bottom lava, the mineshafts that are below the lava level will get filled with lava. On the
+other hand, if bottom lava is generated before the mineshafts, it is possible for a mineshaft to "drill
+through" a lake of lava. MCServer doesn't try to solve this and instead lets the admin choose whichever they
+prefer.</p>
+
+<h3>Specific foliage</h3>
+<p>There are generators for specific kinds of foliage. The dead bushes in the desert biome and lilypads in
+the swamp biome both share the same generating pattern. They are both specific to a single biome and they
+both require a specific block underneath them in order to generate. Their implementation is simple: pick
+several random columns in the chunk. If the column is of the correct biome and has the correct top block,
+add the foliage block on top.</p>
+
+<p>In order to generate the same set of coordinates when the chunk is re-generated, we use the Perlin noise's
+basis functions (the ones providing the random values for Perlin cell vertices). These basically work as a
+hash function for the coorinates - the same input coordinates generate the same output value. We use the
+chunk's coordinates as two of the coords, and the iteration number as the third coordinate, to generate a
+random number. We then check the biome and the top block at those coordinates, if they allow, we generate the
+foliage block on top.</p>
+
+<p>Another example of specific foliage is the tall grass in the plains biome. There are quite a lot of these
+tall grass blocks, it would be inefficient to generate them using the random-coords approach described above.
+Instead, we will use a 2D Perlin noise again, with a threshold defining where to put the grass and where
+not.</p>
+
+<h3>Small foliage</h3>
+<p>For the flowers, grass, mushrooms in caves etc. we want to use a slightly different algorithm. These
+foliage blocks are customarily generated in small "clumps" - there are several blocks of the same type near
+together. To generate these, we first select random coords, using the coord hash functions, for a center of a
+clump. Then we select the type of block to generate. Finally, we loop over adding a random (coord hash)
+number to the clump center coords to get the block where to generate the foliage block:</p>
+<img src="img/smallfoliageclumps.jpg" />
+
+<p>In order to make the clump more "round" and "centered", we want the offsets to be closer to the clump
+center more often. This is done using a thing called Gaussian function distribution. Instead of having each
+random number generate with the same probability, we want higher probability for the numbers around zero,
+like this:</p>
+<img src="img/gaussprobability.jpg" />
+
+<p>Instead of doing complicated calculations to match this shape exactly, we will use a much easier shape.
+By adding together two random numbers in the same range, we get the probability distribution that has a
+"roof" shape, enough for our needs:</p>
+<img src="img/roofprobability.jpg" />
+
+<p>(For the curious, there is a proof that adding together infinitely many uniform-distributed random numbers
+produces random numbers with the Gaussian distribution.)</p>
+
+<p>This scheme can be used to produce clumps of flowers, when we select the 2D coords of the clump center on
+the top surface of the terrain. We simply generate the 2D coords of the foliage blocks and use the terrain
+height to find the third coord. If we want to generate clumps of mushrooms in the caves, however, we need to
+generate the clump center coords in 3D and either use 3 offsets for the mushrooms, or use 2 offsets plus
+searching for the closest opening Y-wise in the terrain.</p>
+
+<p>Note that the clumps generated by this scheme may overlap several chunks. Therefore it's crucial to
+actually check the surrounding chunks if their clumps overlap into the currently generated chunk, and apply
+those as well, otherwise there will be visible cuts in the foliage along the chunks borders.</p>
+
+<h3>Springs</h3>
+<p>Water and lava springs are essential for making the underground quite a lot more interesting. They are
+rather easy to generate, but a bit more difficult to get right. Generating simply means that a few random
+locations (obtained by our familiar coord hashing) are checked and if the block type in there is stone. Then
+we see all the horizontal neighbors of the block, plus the block underneath. If all of them except one are
+stone, and the one left is air, our block is suitable for turning into a spring. If there were more air
+neighbors, the spring would look somewhat unnatural; if there were no air neighbors, the spring won't flow
+anywhere, so it would be rather useless.</p>
+
+<p>The difficult part about springs is the amount of them to generate. There should be a few springs on the
+surface, perhaps a bit more in the mountaineous biomes. There should be quite a few more springs underground,
+but there should definitely be more water springs than lava springs in the upper levels of the terrain, while
+there should be more lava springs and almost no water springs near the bottom. To accomodate this, the
+MCServer team has made a tool that scanned through MineCraft's terrain and counted the amount of both types
+of springs in relation to their height. Two curves have been found for the distribution of each type of the
+spring:</p>
+<img src="http://mc-server.xoft.cz/img/vanilla_springs_huge.png" />
+
+<p>MCServer uses an approximation of the above curves to choose the height at which to generate the
+spring.</p>
+
+<!--
+<h3>Caves</h3>
+<p>Caves are definitely one of the main things people notice about MineCraft terrain. There are quite a lot
+of different algorithms available to generate terrain with caves.
+-->
 
+<hr />
+
+<a name="makefaster"><h2>Making it all faster</h2></a>
+<p>(TODO)</p>
+
+<a name="GPU"><h2>Executing on a GPU</h2></a>
+<p>Much of the terain generation consists of doing the same thing for every single column or block in a chunk. This
+sort of computation is much faster on a GPU as GPUs are massively parallel. High end GPUs can execute up to 30,000
+threads simultaneously, which would allow them to generate every block in half a chunk in parallel or every column
+in over 100 chunks in parallel. A naive comparison suggests that a 800MHz GPU with 15,000 threads can execute parallel
+code 250 times faster than a 3GHz CPU with 128 bit SIMD. Obviously we want to harness that power.</p>
 </body>
 </html>
diff --git a/docs/img/biomalheights.jpg b/docs/img/biomalheights.jpg
new file mode 100644
index 000000000..a01faef87
--- /dev/null
+++ b/docs/img/biomalheights.jpg
diff --git a/docs/img/biomeheights.jpg b/docs/img/biomeheights.jpg
new file mode 100644
index 000000000..9dda27b0e
--- /dev/null
+++ b/docs/img/biomeheights.jpg
diff --git a/docs/img/biomeheightsavg.jpg b/docs/img/biomeheightsavg.jpg
new file mode 100644
index 000000000..c8217cafc
--- /dev/null
+++ b/docs/img/biomeheightsavg.jpg
diff --git a/docs/img/gaussprobability.jpg b/docs/img/gaussprobability.jpg
new file mode 100644
index 000000000..77da24748
--- /dev/null
+++ b/docs/img/gaussprobability.jpg
diff --git a/docs/img/perlincompositor1.jpg b/docs/img/perlincompositor1.jpg
new file mode 100644
index 000000000..0d8f93cd9
--- /dev/null
+++ b/docs/img/perlincompositor1.jpg
diff --git a/docs/img/perlincompositor2.jpg b/docs/img/perlincompositor2.jpg
new file mode 100644
index 000000000..11fc5b51d
--- /dev/null
+++ b/docs/img/perlincompositor2.jpg
diff --git a/docs/img/perlincompositor3.jpg b/docs/img/perlincompositor3.jpg
new file mode 100644
index 000000000..46a2583ba
--- /dev/null
+++ b/docs/img/perlincompositor3.jpg
diff --git a/docs/img/roofprobability.jpg b/docs/img/roofprobability.jpg
new file mode 100644
index 000000000..e7a155113
--- /dev/null
+++ b/docs/img/roofprobability.jpg
diff --git a/docs/img/smallfoliageclumps.jpg b/docs/img/smallfoliageclumps.jpg
new file mode 100644
index 000000000..4cc6cbc00
--- /dev/null
+++ b/docs/img/smallfoliageclumps.jpg
diff --git a/lib/tolua++/src/bin/lua/_driver.lua b/lib/tolua++/src/bin/lua/_driver.lua
new file mode 100644
index 000000000..21db96098
--- /dev/null
+++ b/lib/tolua++/src/bin/lua/_driver.lua
@@ -0,0 +1,93 @@
+
+-- Allow debugging by ZBS, if run under the IDE:
+local mobdebugfound, mobdebug = pcall(require, "mobdebug")
+if mobdebugfound then mobdebug.start() end
+
+-- The list of valid arguments that the ToLua scripts can process:
+local KnownArgs = {
+	['v'] = true,
+  ['h'] = true,
+  ['p'] = true,
+  ['P'] = true,
+  ['o'] = true,
+  ['n'] = true,
+  ['H'] = true,
+  ['S'] = true,
+  ['1'] = true,
+  ['L'] = true,
+  ['D'] = true,
+  ['W'] = true,
+  ['C'] = true,
+  ['E'] = true,
+  ['t'] = true,
+  ['q'] = true,
+}
+
+
+
+
+
+-- The flags table used by ToLua scripts, to be filled from the cmdline params:
+flags = {}
+
+-- Te extra parameters used by ToLua scripts:
+_extra_parameters = {}
+
+-- ToLua version required by the scripts:
+TOLUA_VERSION = "tolua++-1.0.92"
+
+-- Lua version used by ToLua, required by the scripts:
+TOLUA_LUA_VERSION = "Lua 5.1"
+
+
+
+
+
+
+-- Process the cmdline params into the flags table:
+local args = arg or {}
+local argc = #args
+local i = 1
+while (i <= argc) do
+	local argv = args[i]
+	if (argv:sub(1, 1) == "-") then
+		if (KnownArgs[argv:sub(2)]) then
+			print("Setting flag \"" .. argv:sub(2) .. "\" to \"" .. args[i + 1] .. "\".")
+			flags[argv:sub(2)] = args[i + 1]
+			i = i + 1
+		else
+			print("Unknown option (" .. i .. "): " .. argv)
+			print("Aborting.")
+			os.exit(1)
+		end
+	else
+		print("Setting flag \"f\" to \"" .. argv .. "\".")
+		flags['f'] = argv
+		break
+	end
+	i = i + 1
+end
+
+-- Get the path where the scripts are located:
+path = args[0] or ""
+local index = path:find("/[^/]*$")
+if (index == nil) then
+	index = path:find("\\[^\\]*$")
+end
+if (index ~= nil) then
+	path = path:sub(1, index)
+end
+
+print("path is set to \"" .. path .. "\".")
+
+
+
+
+
+-- Call the ToLua processor:
+dofile(path .. "all.lua")
+
+
+
+
+
diff --git a/lib/tolua++/src/bin/lua/basic.lua b/lib/tolua++/src/bin/lua/basic.lua
index 4bff5276b..7b401d638 100644
--- a/lib/tolua++/src/bin/lua/basic.lua
+++ b/lib/tolua++/src/bin/lua/basic.lua
@@ -383,7 +383,7 @@ end
 
 -- called to output an error message
 function output_error_hook(...)
-	return string.format(...)
+	return string.format(...)  -- Note that this line must not end in the triple-dot-parenthesis due to pre-parsing
 end
 
 -- custom pushers
diff --git a/lib/tolua++/src/bin/lua/compat-5.1.lua b/lib/tolua++/src/bin/lua/compat-5.1.lua
index 7a2c60b69..c591592a6 100644
--- a/lib/tolua++/src/bin/lua/compat-5.1.lua
+++ b/lib/tolua++/src/bin/lua/compat-5.1.lua
@@ -18,17 +18,16 @@ local function pp_dofile(path)
 			local ret = file:read("*a")
 			file:close()
 
-			ret = string.gsub(ret, "%.%.%.%s*%)", "...) local arg = {n=select('#', ...), ...};")
-
+			ret = string.gsub(ret, "%.%.%.%s*%)$", "...) local arg = {n=select('#', ...), ...};")
+			
 			loaded = true
 			return ret
 		end
 	end
 
-	local f = load(getfile, path)
+	local f, err = load(getfile, path)
 	if not f then
-	
-		error("error loading file "..path)
+		error("error loading file " .. path .. ": " .. err)
 	end
 	return f()
 end
diff --git a/lib/tolua++/src/bin/lua/declaration.lua b/lib/tolua++/src/bin/lua/declaration.lua
index 26ceeba22..3ec6e144f 100644
--- a/lib/tolua++/src/bin/lua/declaration.lua
+++ b/lib/tolua++/src/bin/lua/declaration.lua
@@ -524,7 +524,7 @@ function Declaration (s,kind,is_parameter)
  end
 
  -- check the form: mod type* name
- local s1 = gsub(s,"(%b\[\])",function (n) return gsub(n,'%*','\1') end)
+ local s1 = gsub(s,"(%b%[%])",function (n) return gsub(n,'%*','\1') end)
  t = split_c_tokens(s1,'%*')
  if t.n == 2 then
   t[2] = gsub(t[2],'\1','%*') -- restore * in dimension expression
diff --git a/lib/tolua++/src/bin/lua/feature.lua b/lib/tolua++/src/bin/lua/feature.lua
index 042b5d28e..14f01d325 100644
--- a/lib/tolua++/src/bin/lua/feature.lua
+++ b/lib/tolua++/src/bin/lua/feature.lua
@@ -132,7 +132,7 @@ function classFeature:cfuncname (n)
  if not fname or fname == '' then
  	fname = self.name
  end
-  n = string.gsub(n..'_'.. (fname), "[<>:, \.%*&]", "_")
+  n = string.gsub(n..'_'.. (fname), "[<>:, %.%*&]", "_")
 
   return n
 end
diff --git a/src/Bindings/AllToLua_lua.bat.bat b/src/Bindings/AllToLua_lua.bat.bat
new file mode 100644
index 000000000..81c738f32
--- /dev/null
+++ b/src/Bindings/AllToLua_lua.bat.bat
@@ -0,0 +1,27 @@
+
+:: AllToLua_Lua.bat
+:: This scripts updates the automatically-generates Lua bindings in Bindings.cpp / Bindings.h
+:: When called without any parameters, it will pause for a keypress at the end
+:: Call with any parameter to disable the wait (for buildserver use)
+:: This script assumes "lua" executable to be in PATH, it uses a pure-lua implementation of the ToLua processor
+
+@echo off
+
+
+
+
+
+:: Regenerate the files:
+echo Regenerating LUA bindings . . .
+lua ..\..\lib\tolua++\src\bin\lua\_driver.lua -L virtual_method_hooks.lua -o Bindings.cpp -H Bindings.h AllToLua.pkg
+
+
+
+
+: Wait for keypress, if no param given:
+echo.
+if %ALLTOLUA_WAIT%N == N pause
+
+
+
+
diff --git a/src/BlockArea.cpp b/src/BlockArea.cpp
index e3a859e4f..4fe6cd51e 100644
--- a/src/BlockArea.cpp
+++ b/src/BlockArea.cpp
@@ -309,6 +309,14 @@ void cBlockArea::Clear(void)
 
 void cBlockArea::Create(int a_SizeX, int a_SizeY, int a_SizeZ, int a_DataTypes)
 {
+	if ((a_SizeX < 0) || (a_SizeY < 0) || (a_SizeZ < 0))
+	{
+		LOGWARNING("Creating a cBlockArea with a negative size! Call to Create ignored. (%d, %d, %d)",
+			a_SizeX, a_SizeY, a_SizeZ
+		);
+		return;
+	}
+	
 	Clear();
 	int BlockCount = a_SizeX * a_SizeY * a_SizeZ;
 	if ((a_DataTypes & baTypes) != 0)
diff --git a/src/BlockID.h b/src/BlockID.h
index 97c1aae86..24b69e41b 100644
--- a/src/BlockID.h
+++ b/src/BlockID.h
@@ -790,6 +790,7 @@ enum eDimension
 	dimNether    = -1,
 	dimOverworld = 0,
 	dimEnd       = 1,
+	dimNotSet    = 255,  // For things that need an "indeterminate" state, such as cProtocol's LastSentDimension
 } ;
 
 
diff --git a/src/Blocks/BlockDoor.cpp b/src/Blocks/BlockDoor.cpp
index 479c68153..fb2d6f2dc 100644
--- a/src/Blocks/BlockDoor.cpp
+++ b/src/Blocks/BlockDoor.cpp
@@ -62,7 +62,7 @@ void cBlockDoorHandler::OnCancelRightClick(cChunkInterface & a_ChunkInterface, c
 	a_WorldInterface.SendBlockTo(a_BlockX, a_BlockY, a_BlockZ, a_Player);
 	NIBBLETYPE Meta = a_ChunkInterface.GetBlockMeta(a_BlockX, a_BlockY, a_BlockZ);
 	
-	if (Meta & 8)
+	if (Meta & 0x8)
 	{
 		// Current block is top of the door
 		a_WorldInterface.SendBlockTo(a_BlockX, a_BlockY - 1, a_BlockZ, a_Player);
diff --git a/src/Blocks/BlockDoor.h b/src/Blocks/BlockDoor.h
index 797fe484c..bc59051c3 100644
--- a/src/Blocks/BlockDoor.h
+++ b/src/Blocks/BlockDoor.h
@@ -20,12 +20,12 @@ public:
 	virtual void OnUse(cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface, cPlayer * a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace, int a_CursorX, int a_CursorY, int a_CursorZ) override;
 	virtual void OnCancelRightClick(cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface, cPlayer * a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace) override;
 	virtual const char * GetStepSound(void) override;
-	
+
 	virtual NIBBLETYPE MetaRotateCCW(NIBBLETYPE a_Meta) override;
 	virtual NIBBLETYPE MetaRotateCW(NIBBLETYPE a_Meta)  override;
 	virtual NIBBLETYPE MetaMirrorXY(NIBBLETYPE a_Meta)  override;
 	virtual NIBBLETYPE MetaMirrorYZ(NIBBLETYPE a_Meta)  override;
-	
+
 	virtual bool GetPlacementBlockTypeMeta(
 		cChunkInterface & a_ChunkInterface, cPlayer * a_Player,
 		int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace, 
@@ -52,7 +52,7 @@ public:
 		return true;
 	}
 
-	
+
 	virtual void ConvertToPickups(cItems & a_Pickups, NIBBLETYPE a_BlockMeta) override
 	{
 		a_Pickups.push_back(cItem((m_BlockType == E_BLOCK_WOODEN_DOOR) ? E_ITEM_WOODEN_DOOR : E_ITEM_IRON_DOOR, 1, 0));
@@ -77,8 +77,8 @@ public:
 	{
 		return ((a_RelY > 0) && (a_Chunk.GetBlock(a_RelX, a_RelY - 1, a_RelZ) != E_BLOCK_AIR));
 	}
-	
-	
+
+
 	bool CanReplaceBlock(BLOCKTYPE a_BlockType)
 	{
 		switch (a_BlockType)
@@ -99,7 +99,7 @@ public:
 	}
 
 
-	/// Converts the player's yaw to placed door's blockmeta
+	/** Converts the player's yaw to placed door's blockmeta */
 	inline static NIBBLETYPE PlayerYawToMetaData(double a_Yaw)
 	{
 		ASSERT((a_Yaw >= -180) && (a_Yaw < 180));
@@ -111,67 +111,109 @@ public:
 		}
 		if ((a_Yaw >= 0) && (a_Yaw < 90))
 		{
-			return 0x0;
+			return 0x00;
 		}
 		else if ((a_Yaw >= 180) && (a_Yaw < 270))
 		{
-			return 0x2;
+			return 0x02;
 		}
 		else if ((a_Yaw >= 90) && (a_Yaw < 180))
 		{
-			return 0x1;
+			return 0x01;
 		}
 		else
 		{
-			return 0x3;
+			return 0x03;
 		}
 	}
 
 
-	/// Returns true if the specified blocktype is any kind of door
+	/** Returns true if the specified blocktype is any kind of door */
 	inline static bool IsDoor(BLOCKTYPE a_Block)
 	{
 		return (a_Block == E_BLOCK_WOODEN_DOOR) || (a_Block == E_BLOCK_IRON_DOOR);
 	}
 
 
-	/// Returns the metadata for the opposite door state (open vs closed)
-	static NIBBLETYPE ChangeStateMetaData(NIBBLETYPE a_MetaData)
+	static NIBBLETYPE IsOpen(cChunkInterface & a_ChunkInterface, int a_BlockX, int a_BlockY, int a_BlockZ)
 	{
-		return a_MetaData ^ 4;
+		NIBBLETYPE Meta = GetCompleteDoorMeta(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ);
+		return ((Meta & 0x04) != 0);
 	}
 
 
-	/// Changes the door at the specified coords from open to close or vice versa
-	static void ChangeDoor(cChunkInterface & a_ChunkInterface, int a_X, int a_Y, int a_Z)
+	/** Returns the complete meta composed from the both parts of the door as (TopMeta << 4) | BottomMeta
+	The coords may point to either part of the door.
+	The returned value has bit 3 (0x08) set iff the coords point to the top part of the door.
+	Fails gracefully for (invalid) doors on the world's top and bottom. */
+	static NIBBLETYPE GetCompleteDoorMeta(cChunkInterface & a_ChunkInterface, int a_BlockX, int a_BlockY, int a_BlockZ)
 	{
-		NIBBLETYPE OldMetaData = a_ChunkInterface.GetBlockMeta(a_X, a_Y, a_Z);
-
-		a_ChunkInterface.SetBlockMeta(a_X, a_Y, a_Z, ChangeStateMetaData(OldMetaData));
+		NIBBLETYPE Meta = a_ChunkInterface.GetBlockMeta(a_BlockX, a_BlockY, a_BlockZ);
 
-		if (OldMetaData & 8)
+		if ((Meta & 0x08) != 0)
 		{
-			// Current block is top of the door
-			BLOCKTYPE  BottomBlock = a_ChunkInterface.GetBlock(a_X, a_Y - 1, a_Z);
-			NIBBLETYPE BottomMeta = a_ChunkInterface.GetBlockMeta(a_X, a_Y - 1, a_Z);
-
-			if (IsDoor(BottomBlock) && !(BottomMeta & 8))
+			// The coords are pointing at the top part of the door
+			if (a_BlockX > 0)
 			{
-				a_ChunkInterface.SetBlockMeta(a_X, a_Y - 1, a_Z, ChangeStateMetaData(BottomMeta));
+				NIBBLETYPE DownMeta = a_ChunkInterface.GetBlockMeta(a_BlockX, a_BlockY - 1, a_BlockZ);
+				return (DownMeta & 0x07) | 0x08 | (Meta << 4);
 			}
+			// This is the top part of the door at the bottommost layer of the world, there's no bottom:
+			return 0x08 | (Meta << 4);
 		}
 		else
 		{
-			// Current block is bottom of the door
-			BLOCKTYPE  TopBlock = a_ChunkInterface.GetBlock(a_X, a_Y + 1, a_Z);
-			NIBBLETYPE TopMeta = a_ChunkInterface.GetBlockMeta(a_X, a_Y + 1, a_Z);
+			// The coords are pointing at the bottom part of the door
+			if (a_BlockY < cChunkDef::Height - 1)
+			{
+				NIBBLETYPE UpMeta = a_ChunkInterface.GetBlockMeta(a_BlockX, a_BlockY + 1, a_BlockZ);
+				return Meta | (UpMeta << 4);
+			}
+			// This is the bottom part of the door at the topmost layer of the world, there's no top:
+			return Meta;
+		}
+	}
 
-			if (IsDoor(TopBlock) && (TopMeta & 8))
+
+	/** Sets the door to the specified state. If the door is already in that state, does nothing. */
+	static void SetOpen(cChunkInterface & a_ChunkInterface, int a_BlockX, int a_BlockY, int a_BlockZ, bool a_Open)
+	{
+		BLOCKTYPE Block = a_ChunkInterface.GetBlock(a_BlockX, a_BlockY, a_BlockZ);
+		if (!IsDoor(Block))
+		{
+			return;
+		}
+
+		NIBBLETYPE Meta = GetCompleteDoorMeta(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ);
+		bool IsOpened = ((Meta & 0x04) != 0);
+		if (IsOpened == a_Open)
+		{
+			return;
+		}
+
+		// Change the door
+		NIBBLETYPE NewMeta = (Meta & 0x07) ^ 0x04;  // Flip the "IsOpen" bit (0x04)
+		if ((Meta & 0x08) == 0)
+		{
+			// The block is the bottom part of the door
+			a_ChunkInterface.SetBlockMeta(a_BlockX, a_BlockY, a_BlockZ, NewMeta);
+		}
+		else
+		{
+			// The block is the top part of the door, set the meta to the corresponding top part
+			if (a_BlockY > 0)
 			{
-				a_ChunkInterface.SetBlockMeta(a_X, a_Y + 1, a_Z, ChangeStateMetaData(TopMeta));
+				a_ChunkInterface.SetBlockMeta(a_BlockX, a_BlockY - 1, a_BlockZ, NewMeta);
 			}
 		}
 	}
+
+
+	/** Changes the door at the specified coords from open to close or vice versa */
+	static void ChangeDoor(cChunkInterface & a_ChunkInterface, int a_BlockX, int a_BlockY, int a_BlockZ)
+	{
+		SetOpen(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ, !IsOpen(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ));
+	}
 } ;
 
 
diff --git a/src/Chunk.cpp b/src/Chunk.cpp
index 02857ba5a..399c8b9c7 100644
--- a/src/Chunk.cpp
+++ b/src/Chunk.cpp
@@ -1518,6 +1518,7 @@ void cChunk::FastSetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockT
 	}
 
 	MarkDirty();
+	m_IsRedstoneDirty = true;
 
 	m_ChunkData.SetBlock(a_RelX, a_RelY, a_RelZ, a_BlockType);
 
diff --git a/src/Chunk.h b/src/Chunk.h
index 92350243c..8123ac062 100644
--- a/src/Chunk.h
+++ b/src/Chunk.h
@@ -332,6 +332,7 @@ public:
 			if (hasChanged)
 			{
 				MarkDirty();
+				m_IsRedstoneDirty = true;
 				
 				m_PendingSendBlocks.push_back(sSetBlock(m_PosX, m_PosZ, a_RelX, a_RelY, a_RelZ, GetBlock(a_RelX, a_RelY, a_RelZ), a_Meta));
 			}
@@ -378,10 +379,13 @@ public:
 	cSandSimulatorChunkData & GetSandSimulatorData (void) { return m_SandSimulatorData; }
 
 	cRedstoneSimulatorChunkData * GetRedstoneSimulatorData(void) { return &m_RedstoneSimulatorData; }
+	cRedstoneSimulatorChunkData * GetRedstoneSimulatorQueuedData(void) { return &m_RedstoneSimulatorQueuedData; }
 	cIncrementalRedstoneSimulator::PoweredBlocksList * GetRedstoneSimulatorPoweredBlocksList(void) { return &m_RedstoneSimulatorPoweredBlocksList; }
 	cIncrementalRedstoneSimulator::LinkedBlocksList * GetRedstoneSimulatorLinkedBlocksList(void) { return &m_RedstoneSimulatorLinkedBlocksList; };
 	cIncrementalRedstoneSimulator::SimulatedPlayerToggleableList * GetRedstoneSimulatorSimulatedPlayerToggleableList(void) { return &m_RedstoneSimulatorSimulatedPlayerToggleableList; };
 	cIncrementalRedstoneSimulator::RepeatersDelayList * GetRedstoneSimulatorRepeatersDelayList(void) { return &m_RedstoneSimulatorRepeatersDelayList; };
+	bool IsRedstoneDirty(void) const { return m_IsRedstoneDirty; }
+	void SetIsRedstoneDirty(bool a_Flag) { m_IsRedstoneDirty = a_Flag; }
 
 	cBlockEntity * GetBlockEntity(int a_BlockX, int a_BlockY, int a_BlockZ);
 	cBlockEntity * GetBlockEntity(const Vector3i & a_BlockPos) { return GetBlockEntity(a_BlockPos.x, a_BlockPos.y, a_BlockPos.z); }
@@ -450,13 +454,16 @@ private:
 	cSandSimulatorChunkData m_SandSimulatorData;
 
 	cRedstoneSimulatorChunkData m_RedstoneSimulatorData;
+	cRedstoneSimulatorChunkData m_RedstoneSimulatorQueuedData;
 	cIncrementalRedstoneSimulator::PoweredBlocksList m_RedstoneSimulatorPoweredBlocksList;
 	cIncrementalRedstoneSimulator::LinkedBlocksList m_RedstoneSimulatorLinkedBlocksList;
 	cIncrementalRedstoneSimulator::SimulatedPlayerToggleableList m_RedstoneSimulatorSimulatedPlayerToggleableList;
 	cIncrementalRedstoneSimulator::RepeatersDelayList m_RedstoneSimulatorRepeatersDelayList;
 
+	/** Indicates if simulate-once blocks should be updated by the redstone simulator */
+	bool m_IsRedstoneDirty;
 
-	// pick up a random block of this chunk
+	// Pick up a random block of this chunk
 	void getRandomBlockCoords(int& a_X, int& a_Y, int& a_Z);
 	void getThreeRandomNumber(int& a_X, int& a_Y, int& a_Z,int a_MaxX, int a_MaxY, int a_MaxZ);
 
diff --git a/src/ChunkData.cpp b/src/ChunkData.cpp
index 1fa2fd212..f2d220bd2 100644
--- a/src/ChunkData.cpp
+++ b/src/ChunkData.cpp
@@ -258,7 +258,7 @@ bool cChunkData::SetMeta(int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE a_Nibble
 		(m_Sections[Section]->m_BlockMetas[Index / 2] & (0xf0 >> ((Index & 1) * 4))) |  // The untouched nibble
 		((a_Nibble & 0x0f) << ((Index & 1) * 4))  // The nibble being set
 	);
-	return oldval == a_Nibble;
+	return oldval != a_Nibble;
 }
 
 
diff --git a/src/ChunkMap.cpp b/src/ChunkMap.cpp
index 0a8164b47..dba6f3f41 100644
--- a/src/ChunkMap.cpp
+++ b/src/ChunkMap.cpp
@@ -1665,6 +1665,30 @@ void cChunkMap::AddEntity(cEntity * a_Entity)
 
 
 
+void cChunkMap::AddEntityIfNotPresent(cEntity * a_Entity)
+{
+	cCSLock Lock(m_CSLayers);
+	cChunkPtr Chunk = GetChunkNoGen(a_Entity->GetChunkX(), ZERO_CHUNK_Y, a_Entity->GetChunkZ());
+	if (
+		(Chunk == NULL) ||  // Chunk not present at all
+		(!Chunk->IsValid() && !a_Entity->IsPlayer())  // Chunk present, but no valid data; players need to spawn in such chunks (#953)
+	)
+	{
+		LOGWARNING("Entity at %p (%s, ID %d) spawning in a non-existent chunk, the entity is lost.",
+			a_Entity, a_Entity->GetClass(), a_Entity->GetUniqueID()
+		);
+		return;
+	}
+	if (!Chunk->HasEntity(a_Entity->GetUniqueID()))
+	{
+		Chunk->AddEntity(a_Entity);
+	}
+}
+
+
+
+
+
 bool cChunkMap::HasEntity(int a_UniqueID)
 {
 	cCSLock Lock(m_CSLayers);
diff --git a/src/ChunkMap.h b/src/ChunkMap.h
index 8786d7016..7e85bb6f1 100644
--- a/src/ChunkMap.h
+++ b/src/ChunkMap.h
@@ -199,6 +199,10 @@ public:
 	/** Adds the entity to its appropriate chunk, takes ownership of the entity pointer */
 	void AddEntity(cEntity * a_Entity);
 	
+	/** Adds the entity to its appropriate chunk, if the entity is not already added.
+	Takes ownership of the entity pointer */
+	void AddEntityIfNotPresent(cEntity * a_Entity);
+	
 	/** Returns true if the entity with specified ID is present in the chunks */
 	bool HasEntity(int a_EntityID);
 	
diff --git a/src/ClientHandle.cpp b/src/ClientHandle.cpp
index 1e2c148b8..256dad7da 100644
--- a/src/ClientHandle.cpp
+++ b/src/ClientHandle.cpp
@@ -326,7 +326,7 @@ void cClientHandle::Authenticate(const AString & a_Name, const AString & a_UUID)
 	// Send experience
 	m_Player->SendExperience();
 	
-	m_Player->Initialize(World);
+	m_Player->Initialize(*World);
 	m_State = csAuthenticated;
 
 	// Query player team
@@ -355,7 +355,7 @@ void cClientHandle::StreamChunks(void)
 	}
 
 	ASSERT(m_Player != NULL);
-	
+
 	int ChunkPosX = FAST_FLOOR_DIV((int)m_Player->GetPosX(), cChunkDef::Width);
 	int ChunkPosZ = FAST_FLOOR_DIV((int)m_Player->GetPosZ(), cChunkDef::Width);
 	if ((ChunkPosX == m_LastStreamedChunkX) && (ChunkPosZ == m_LastStreamedChunkZ))
@@ -1088,18 +1088,25 @@ void cClientHandle::HandleRightClick(int a_BlockX, int a_BlockY, int a_BlockZ, e
 	cWorld * World = m_Player->GetWorld();
 
 	if (
-		(Diff(m_Player->GetPosX(), (double)a_BlockX) > 6) ||
-		(Diff(m_Player->GetPosY(), (double)a_BlockY) > 6) ||
-		(Diff(m_Player->GetPosZ(), (double)a_BlockZ) > 6)
+		(a_BlockFace != BLOCK_FACE_NONE) &&  // The client is interacting with a specific block
+		(
+			(Diff(m_Player->GetPosX(), (double)a_BlockX) > 6) ||  // The block is too far away
+			(Diff(m_Player->GetPosY(), (double)a_BlockY) > 6) ||
+			(Diff(m_Player->GetPosZ(), (double)a_BlockZ) > 6)
+		)
 	)
 	{
-		if (a_BlockFace != BLOCK_FACE_NONE)
+		AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, a_BlockFace);
+		World->SendBlockTo(a_BlockX, a_BlockY, a_BlockZ, m_Player);
+		if (a_BlockY < cChunkDef::Height - 1)
 		{
-			AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, a_BlockFace);
-			World->SendBlockTo(a_BlockX, a_BlockY, a_BlockZ, m_Player);
 			World->SendBlockTo(a_BlockX, a_BlockY + 1, a_BlockZ, m_Player);  // 2 block high things
-			m_Player->GetInventory().SendEquippedSlot();
 		}
+		if (a_BlockY > 0)
+		{
+			World->SendBlockTo(a_BlockX, a_BlockY - 1, a_BlockZ, m_Player);  // 2 block high things
+		}
+		m_Player->GetInventory().SendEquippedSlot();
 		return;
 	}
 
@@ -1745,18 +1752,8 @@ void cClientHandle::SendData(const char * a_Data, size_t a_Size)
 
 
 
-void cClientHandle::MoveToWorld(cWorld & a_World, bool a_SendRespawnPacket)
+void cClientHandle::RemoveFromWorld(void)
 {
-	UNUSED(a_World);
-	ASSERT(m_Player != NULL);
-	
-	if (a_SendRespawnPacket)
-	{
-		SendRespawn(a_World);
-	}
-
-	cWorld * World = m_Player->GetWorld();
-		
 	// Remove all associated chunks:
 	cChunkCoordsList Chunks;
 	{
@@ -1766,7 +1763,6 @@ void cClientHandle::MoveToWorld(cWorld & a_World, bool a_SendRespawnPacket)
 	}
 	for (cChunkCoordsList::iterator itr = Chunks.begin(), end = Chunks.end(); itr != end; ++itr)
 	{
-		World->RemoveChunkClient(itr->m_ChunkX, itr->m_ChunkZ, this);
 		m_Protocol->SendUnloadChunk(itr->m_ChunkX, itr->m_ChunkZ);
 	}  // for itr - Chunks[]
 	
diff --git a/src/ClientHandle.h b/src/ClientHandle.h
index e86287735..0d883f3af 100644
--- a/src/ClientHandle.h
+++ b/src/ClientHandle.h
@@ -250,8 +250,9 @@ public:
 	
 	void SendData(const char * a_Data, size_t a_Size);
 	
-	/** Called when the player moves into a different world; queues sreaming the new chunks */
-	void MoveToWorld(cWorld & a_World, bool a_SendRespawnPacket);
+	/** Called when the player moves into a different world.
+	Sends an UnloadChunk packet for each loaded chunk and resets the streamed chunks. */
+	void RemoveFromWorld(void);
 	
 	/** Called when the player will enchant a Item */
 	void HandleEnchantItem(Byte & WindowID, Byte & Enchantment);
diff --git a/src/Entities/Entity.cpp b/src/Entities/Entity.cpp
index 4b376a1fe..334cf5aa7 100644
--- a/src/Entities/Entity.cpp
+++ b/src/Entities/Entity.cpp
@@ -130,9 +130,9 @@ const char * cEntity::GetParentClass(void) const
 
 
 
-bool cEntity::Initialize(cWorld * a_World)
+bool cEntity::Initialize(cWorld & a_World)
 {
-	if (cPluginManager::Get()->CallHookSpawningEntity(*a_World, *this))
+	if (cPluginManager::Get()->CallHookSpawningEntity(a_World, *this))
 	{
 		return false;
 	}
@@ -145,13 +145,13 @@ bool cEntity::Initialize(cWorld * a_World)
 	*/
 	
 	m_IsInitialized = true;
-	m_World = a_World;
+	m_World = &a_World;
 	m_World->AddEntity(this);
 	
-	cPluginManager::Get()->CallHookSpawnedEntity(*a_World, *this);
+	cPluginManager::Get()->CallHookSpawnedEntity(a_World, *this);
 	
 	// Spawn the entity on the clients:
-	a_World->BroadcastSpawnEntity(*this);
+	a_World.BroadcastSpawnEntity(*this);
 	
 	return true;
 }
diff --git a/src/Entities/Entity.h b/src/Entities/Entity.h
index b2317aaac..934e0302b 100644
--- a/src/Entities/Entity.h
+++ b/src/Entities/Entity.h
@@ -146,8 +146,9 @@ public:
 	cEntity(eEntityType a_EntityType, double a_X, double a_Y, double a_Z, double a_Width, double a_Height);
 	virtual ~cEntity();
 
-	/// Spawns the entity in the world; returns true if spawned, false if not (plugin disallowed)
-	virtual bool Initialize(cWorld * a_World);
+	/** Spawns the entity in the world; returns true if spawned, false if not (plugin disallowed).
+	Adds the entity to the world. */
+	virtual bool Initialize(cWorld & a_World);
 
 	// tolua_begin
 	
@@ -430,6 +431,9 @@ public:
 		UNUSED(a_Killer);
 	}
 
+	/** Sets the internal world pointer to a new cWorld, doesn't update anything else. */
+	void SetWorld(cWorld * a_World) { m_World = a_World; }
+
 protected:
 	static cCriticalSection m_CSCount;
 	static int m_EntityCount;
@@ -494,8 +498,6 @@ protected:
 
 	virtual void Destroyed(void) {} // Called after the entity has been destroyed
 
-	void SetWorld(cWorld * a_World) { m_World = a_World; }
-
 	/** Called in each tick to handle air-related processing i.e. drowning */
 	virtual void HandleAir();
 	
diff --git a/src/Entities/ItemFrame.cpp b/src/Entities/ItemFrame.cpp
index 9dd909880..7bc7bda8d 100644
--- a/src/Entities/ItemFrame.cpp
+++ b/src/Entities/ItemFrame.cpp
@@ -55,6 +55,7 @@ void cItemFrame::KilledBy(cEntity * a_Killer)
 {
 	if (m_Item.IsEmpty())
 	{
+		SetHealth(0);
 		super::KilledBy(a_Killer);
 		Destroy();
 		return;
@@ -69,8 +70,9 @@ void cItemFrame::KilledBy(cEntity * a_Killer)
 	}
 
 	SetHealth(GetMaxHealth());
-	m_Item.Clear();
+	m_Item.Empty();
 	m_Rotation = 0;
+	SetInvulnerableTicks(0);
 	GetWorld()->BroadcastEntityMetadata(*this);
 }
 
diff --git a/src/Entities/Player.cpp b/src/Entities/Player.cpp
index af4299e4b..4d6688694 100644
--- a/src/Entities/Player.cpp
+++ b/src/Entities/Player.cpp
@@ -934,6 +934,8 @@ void cPlayer::Killed(cEntity * a_Victim)
 
 void cPlayer::Respawn(void)
 {
+	ASSERT(m_World != NULL);
+
 	m_Health = GetMaxHealth();
 	SetInvulnerableTicks(20);
 	
@@ -1590,24 +1592,22 @@ bool cPlayer::MoveToWorld(const AString & a_WorldName, cWorld * a_World)
 		return false;
 	}
 	
-	eDimension OldDimension = m_World->GetDimension();
-	
+	// Send the respawn packet:
+	if (m_ClientHandle != NULL)
+	{
+		m_ClientHandle->SendRespawn(*World);
+	}
+
 	// Remove all links to the old world
 	m_World->RemovePlayer(this);
-	m_ClientHandle->RemoveFromAllChunks();
 
 	// If the dimension is different, we can send the respawn packet
 	// http://wiki.vg/Protocol#0x09 says "don't send if dimension is the same" as of 2013_07_02
-	bool SendRespawn = OldDimension != World->GetDimension();
-	m_ClientHandle->MoveToWorld(*World, SendRespawn);
 
-	// Add player to all the necessary parts of the new world
-	SetWorld(World);
-	m_ClientHandle->StreamChunks();
-	World->AddEntity(this);
+	// Queue adding player to the new world, including all the necessary adjustments to the object
 	World->AddPlayer(this);
 
-	if (SendRespawn)
+	if (GetWorld()->GetDimension() != World->GetDimension())
 	{
 		GetClientHandle()->SendPlayerMoveLook();
 		GetClientHandle()->SendHealth();
diff --git a/src/Entities/Player.h b/src/Entities/Player.h
index 39031fbfb..99a0e601c 100644
--- a/src/Entities/Player.h
+++ b/src/Entities/Player.h
@@ -328,6 +328,8 @@ public:
 	void SetVisible( bool a_bVisible );										// tolua_export
 	bool IsVisible(void) const { return m_bVisible; }									// tolua_export
 
+	/** Moves the player to the specified world.
+	Returns true if successful, false on failure (world not found). */
 	virtual bool MoveToWorld(const AString & a_WorldName, cWorld * a_World = NULL) override;  // tolua_export
 
 	/** Saves all player data, such as inventory, to JSON */
diff --git a/src/Generating/CompoGen.cpp b/src/Generating/CompoGen.cpp
index 578bb2481..688d19c40 100644
--- a/src/Generating/CompoGen.cpp
+++ b/src/Generating/CompoGen.cpp
@@ -561,10 +561,16 @@ void cCompoGenNether::ComposeTerrain(cChunkDesc & a_ChunkDesc)
 	// Interpolate the lowest floor:
 	for (int z = 0; z <= 16 / INTERPOL_Z; z++) for (int x = 0; x <= 16 / INTERPOL_X; x++)
 	{
-		FloorLo[INTERPOL_X * x + 17 * INTERPOL_Z * z] = 
+		//*
+		FloorLo[INTERPOL_X * x + 17 * INTERPOL_Z * z] =
 			m_Noise1.IntNoise3DInt(BaseX + INTERPOL_X * x, 0, BaseZ + INTERPOL_Z * z) * 
 			m_Noise2.IntNoise3DInt(BaseX + INTERPOL_X * x, 0, BaseZ + INTERPOL_Z * z) /
 			256;
+		//*/
+		/*
+		FloorLo[INTERPOL_X * x + 17 * INTERPOL_Z * z] =
+			m_Noise1.IntNoise3DInt(BaseX + INTERPOL_X * x, 0, BaseZ + INTERPOL_Z * z) / 256;
+		//*/
 	}  // for x, z - FloorLo[]
 	LinearUpscale2DArrayInPlace<17, 17, INTERPOL_X, INTERPOL_Z>(FloorLo);
 	
@@ -574,10 +580,16 @@ void cCompoGenNether::ComposeTerrain(cChunkDesc & a_ChunkDesc)
 		// First update the high floor:
 		for (int z = 0; z <= 16 / INTERPOL_Z; z++) for (int x = 0; x <= 16 / INTERPOL_X; x++)
 		{
+			//*
 			FloorHi[INTERPOL_X * x + 17 * INTERPOL_Z * z] =
 				m_Noise1.IntNoise3DInt(BaseX + INTERPOL_X * x, Segment + SEGMENT_HEIGHT, BaseZ + INTERPOL_Z * z) *
 				m_Noise2.IntNoise3DInt(BaseX + INTERPOL_Z * x, Segment + SEGMENT_HEIGHT, BaseZ + INTERPOL_Z * z) /
 				256;
+			//*/
+			/*
+			FloorHi[INTERPOL_X * x + 17 * INTERPOL_Z * z] =
+				m_Noise1.IntNoise3DInt(BaseX + INTERPOL_X * x, Segment + SEGMENT_HEIGHT, BaseZ + INTERPOL_Z * z) / 256;
+			//*/
 		}  // for x, z - FloorLo[]
 		LinearUpscale2DArrayInPlace<17, 17, INTERPOL_X, INTERPOL_Z>(FloorHi);
 		
diff --git a/src/Generating/ComposableGenerator.cpp b/src/Generating/ComposableGenerator.cpp
index 37a6b829a..7f57343ad 100644
--- a/src/Generating/ComposableGenerator.cpp
+++ b/src/Generating/ComposableGenerator.cpp
@@ -24,6 +24,7 @@
 #include "NetherFortGen.h"
 #include "Noise3DGenerator.h"
 #include "POCPieceGenerator.h"
+#include "RainbowRoadsGen.h"
 #include "Ravines.h"
 #include "UnderwaterBaseGen.h"
 #include "VillageGen.h"
@@ -377,6 +378,13 @@ void cComposableGenerator::InitFinishGens(cIniFile & a_IniFile)
 		{
 			m_FinishGens.push_back(new cFinishGenPreSimulator);
 		}
+		else if (NoCaseCompare(*itr, "RainbowRoads") == 0)
+		{
+			int GridSize = a_IniFile.GetValueSetI("Generator", "RainbowRoadsGridSize", 512);
+			int MaxDepth = a_IniFile.GetValueSetI("Generator", "RainbowRoadsMaxDepth",  30);
+			int MaxSize  = a_IniFile.GetValueSetI("Generator", "RainbowRoadsMaxSize",  260);
+			m_FinishGens.push_back(new cRainbowRoadsGen(Seed, GridSize, MaxDepth, MaxSize));
+		}
 		else if (NoCaseCompare(*itr, "Ravines") == 0)
 		{
 			m_FinishGens.push_back(new cStructGenRavines(Seed, 128));
@@ -395,9 +403,9 @@ void cComposableGenerator::InitFinishGens(cIniFile & a_IniFile)
 		}
 		else if (NoCaseCompare(*itr, "UnderwaterBases") == 0)
 		{
-			int GridSize   = a_IniFile.GetValueSetI("Generator", "UnderwaterBaseGridSize", 1024);
-			int MaxDepth   = a_IniFile.GetValueSetI("Generator", "UnderwaterBaseMaxDepth",    7);
-			int MaxSize    = a_IniFile.GetValueSetI("Generator", "UnderwaterBaseMaxSize",   128);
+			int GridSize = a_IniFile.GetValueSetI("Generator", "UnderwaterBaseGridSize", 1024);
+			int MaxDepth = a_IniFile.GetValueSetI("Generator", "UnderwaterBaseMaxDepth",    7);
+			int MaxSize  = a_IniFile.GetValueSetI("Generator", "UnderwaterBaseMaxSize",   128);
 			m_FinishGens.push_back(new cUnderwaterBaseGen(Seed, GridSize, MaxDepth, MaxSize, *m_BiomeGen));
 		}
 		else if (NoCaseCompare(*itr, "Villages") == 0)
diff --git a/src/Generating/HeiGen.cpp b/src/Generating/HeiGen.cpp
index 3621421c2..25ac912fd 100644
--- a/src/Generating/HeiGen.cpp
+++ b/src/Generating/HeiGen.cpp
@@ -47,6 +47,10 @@ cTerrainHeightGen * cTerrainHeightGen::CreateHeightGen(cIniFile &a_IniFile, cBio
 	{
 		res = new cEndGen(a_Seed);
 	}
+	else if (NoCaseCompare(HeightGenName, "Mountains") == 0)
+	{
+		res = new cHeiGenMountains(a_Seed);
+	}
 	else if (NoCaseCompare(HeightGenName, "Noise3D") == 0)
 	{
 		res = new cNoise3DComposable(a_Seed);
@@ -301,6 +305,68 @@ void cHeiGenClassic::InitializeHeightGen(cIniFile & a_IniFile)
 
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cHeiGenMountains:
+
+cHeiGenMountains::cHeiGenMountains(int a_Seed) :
+	m_Seed(a_Seed),
+	m_Noise(a_Seed)
+{
+}
+
+
+
+
+
+void cHeiGenMountains::GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap)
+{
+	NOISE_DATATYPE StartX = (NOISE_DATATYPE)(a_ChunkX * cChunkDef::Width);
+	NOISE_DATATYPE EndX   = (NOISE_DATATYPE)(a_ChunkX * cChunkDef::Width + cChunkDef::Width - 1);
+	NOISE_DATATYPE StartZ = (NOISE_DATATYPE)(a_ChunkZ * cChunkDef::Width);
+	NOISE_DATATYPE EndZ   = (NOISE_DATATYPE)(a_ChunkZ * cChunkDef::Width + cChunkDef::Width - 1);
+	NOISE_DATATYPE Workspace[16 * 16];
+	NOISE_DATATYPE Noise[16 * 16];
+	NOISE_DATATYPE PerlinNoise[16 * 16];
+	m_Noise.Generate2D(Noise, 16, 16, StartX, EndX, StartZ, EndZ, Workspace);
+	m_Perlin.Generate2D(PerlinNoise, 16, 16, StartX, EndX, StartZ, EndZ, Workspace);
+	for (int z = 0; z < cChunkDef::Width; z++)
+	{
+		int IdxZ = z * cChunkDef::Width;
+		for (int x = 0; x < cChunkDef::Width; x++)
+		{
+			int idx = IdxZ + x;
+			int hei = 100 - (int)((Noise[idx] + PerlinNoise[idx]) * 15);
+			if (hei < 10)
+			{
+				hei = 10;
+			}
+			if (hei > 250)
+			{
+				hei = 250;
+			}
+			cChunkDef::SetHeight(a_HeightMap, x , z, hei);
+		}  // for x
+	}  // for z
+}
+
+
+
+
+
+void cHeiGenMountains::InitializeHeightGen(cIniFile & a_IniFile)
+{
+	// TODO: Read the params from an INI file
+	m_Noise.AddOctave(0.1f,  0.1f);
+	m_Noise.AddOctave(0.05f, 0.5f);
+	m_Noise.AddOctave(0.02f, 1.5f);
+
+	m_Perlin.AddOctave(0.01f, 1.5f);
+}
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 // cHeiGenBiomal:
 
 const cHeiGenBiomal::sGenParam cHeiGenBiomal::m_GenParam[256] =
diff --git a/src/Generating/HeiGen.h b/src/Generating/HeiGen.h
index 1376f2a25..5c106c7d9 100644
--- a/src/Generating/HeiGen.h
+++ b/src/Generating/HeiGen.h
@@ -106,6 +106,27 @@ protected:
 
 
 
+class cHeiGenMountains :
+	public cTerrainHeightGen
+{
+public:
+	cHeiGenMountains(int a_Seed);
+	
+protected:
+
+	int m_Seed;
+	cRidgedMultiNoise m_Noise;
+	cPerlinNoise m_Perlin;
+	
+	// cTerrainHeightGen overrides:
+	virtual void GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap) override;
+	virtual void InitializeHeightGen(cIniFile & a_IniFile) override;
+} ;
+
+
+
+
+
 class cHeiGenBiomal :
 	public cTerrainHeightGen
 {
diff --git a/src/Generating/Prefabs/RainbowRoadPrefabs.cpp b/src/Generating/Prefabs/RainbowRoadPrefabs.cpp
new file mode 100644
index 000000000..1a3765c5a
--- /dev/null
+++ b/src/Generating/Prefabs/RainbowRoadPrefabs.cpp
@@ -0,0 +1,1406 @@
+
+// RainbowRoadPrefabs.cpp
+
+// Defines the prefabs in the group RainbowRoad
+
+// NOTE: This file has been generated automatically by GalExport!
+// Any manual changes will be overwritten by the next automatic export!
+
+#include "Globals.h"
+#include "RainbowRoadPrefabs.h"
+
+
+
+
+
+const cPrefab::sDef g_RainbowRoadPrefabs[] =
+{
+	///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+	// CurveDouble:
+	// The data has been exported from the gallery Cube, area index 89, ID 467, created by Aloe_vera
+	{
+		// Size:
+		14, 1, 14,  // SizeX = 14, SizeY = 1, SizeZ = 14
+
+		// Hitbox (relative to bounding box):
+		0, -2, 0,  // MinX, MinY, MinZ
+		13, 2, 13,  // MaxX, MaxY, MaxZ
+
+		// Block definitions:
+		".:  0: 0\n"  /* air */
+		"a: 35:11\n"  /* wool */
+		"b: 35: 3\n"  /* wool */
+		"c: 35: 5\n"  /* wool */
+		"d: 35: 4\n"  /* wool */
+		"e: 35: 1\n"  /* wool */
+		"f: 35:14\n"  /* wool */
+		"m: 19: 0\n"  /* sponge */,
+
+		// Block data:
+		// Level 0
+		/* z\x*             1111 */
+		/*    *   01234567890123 */
+		/*  0 */ "aaaaaa........"
+		/*  1 */ "bbbbbba......."
+		/*  2 */ "cccccbbaaa...."
+		/*  3 */ "dddddccbbaa..."
+		/*  4 */ "eeeeeddccbaa.."
+		/*  5 */ "fffffeddccba.."
+		/*  6 */ "ffffffeedcbaa."
+		/*  7 */ "eeeefffeddcba."
+		/*  8 */ "dddeefffedcbba"
+		/*  9 */ "cccddefffedcba"
+		/* 10 */ "bbccdeeffedcba"
+		/* 11 */ "abbccdeffedcba"
+		/* 12 */ ".abbcdeffedcba"
+		/* 13 */ "..abcdeffedcba",
+
+		// Connectors:
+		"2: 2, 1, 13: 3\n"  /* Type 2, direction Z+ */
+		"2: 0, 1, 0: 4\n"  /* Type 2, direction X- */
+		"-2: 0, 1, 11: 4\n"  /* Type -2, direction X- */
+		"-2: 13, 1, 13: 3\n"  /* Type -2, direction Z+ */,
+
+		// AllowedRotations:
+		7,  /* 1, 2, 3 CCW rotation allowed */
+
+		// Merge strategy:
+		cBlockArea::msSpongePrint,
+
+		// ShouldExtendFloor:
+		false,
+
+		// DefaultWeight:
+		100,
+
+		// DepthWeight:
+		"",
+
+		// AddWeightIfSame:
+		0,
+
+		// MoveToGround:
+		false,
+	},  // CurveDouble
+
+
+
+	///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+	// CurveDownFromTopSingle:
+	// The data has been exported from the gallery Cube, area index 100, ID 478, created by Aloe_vera
+	{
+		// Size:
+		11, 8, 11,  // SizeX = 11, SizeY = 8, SizeZ = 11
+
+		// Hitbox (relative to bounding box):
+		0, -2, 0,  // MinX, MinY, MinZ
+		10, 9, 10,  // MaxX, MaxY, MaxZ
+
+		// Block definitions:
+		".:  0: 0\n"  /* air */
+		"a: 35:14\n"  /* wool */
+		"b: 35: 5\n"  /* wool */
+		"c: 35: 4\n"  /* wool */
+		"d: 35: 1\n"  /* wool */
+		"e: 35:11\n"  /* wool */
+		"f: 35: 3\n"  /* wool */
+		"m: 19: 0\n"  /* sponge */,
+
+		// Block data:
+		// Level 0
+		/* z\x*             1 */
+		/*    *   01234567890 */
+		/*  0 */ "..........."
+		/*  1 */ "..........."
+		/*  2 */ "..........."
+		/*  3 */ "..........."
+		/*  4 */ "..........."
+		/*  5 */ "..........."
+		/*  6 */ "..........."
+		/*  7 */ "..........."
+		/*  8 */ "..........a"
+		/*  9 */ ".......bcda"
+		/* 10 */ ".....efbcda"
+
+		// Level 1
+		/* z\x*             1 */
+		/*    *   01234567890 */
+		/*  0 */ "..........."
+		/*  1 */ "..........."
+		/*  2 */ "..........."
+		/*  3 */ "..........."
+		/*  4 */ "..........."
+		/*  5 */ "..........."
+		/*  6 */ "........cda"
+		/*  7 */ ".......bcda"
+		/*  8 */ ".......bcd."
+		/*  9 */ ".....ef...."
+		/* 10 */ "..........."
+
+		// Level 2
+		/* z\x*             1 */
+		/*    *   01234567890 */
+		/*  0 */ "..........."
+		/*  1 */ "..........."
+		/*  2 */ "..........."
+		/*  3 */ "..........."
+		/*  4 */ ".........a."
+		/*  5 */ ".......cdda"
+		/*  6 */ "......bc..."
+		/*  7 */ "......b...."
+		/*  8 */ ".....ff...."
+		/*  9 */ "....ee....."
+		/* 10 */ "..........."
+
+		// Level 3
+		/* z\x*             1 */
+		/*    *   01234567890 */
+		/*  0 */ "..........."
+		/*  1 */ "..........."
+		/*  2 */ "..........."
+		/*  3 */ "........aa."
+		/*  4 */ "......ccd.."
+		/*  5 */ ".....bb...."
+		/*  6 */ ".....f....."
+		/*  7 */ "....ef....."
+		/*  8 */ "....e......"
+		/*  9 */ "..........."
+		/* 10 */ "..........."
+
+		// Level 4
+		/* z\x*             1 */
+		/*    *   01234567890 */
+		/*  0 */ "..........."
+		/*  1 */ "..........."
+		/*  2 */ "......daa.."
+		/*  3 */ ".....ccd..."
+		/*  4 */ "....bb....."
+		/*  5 */ "....f......"
+		/*  6 */ "...ef......"
+		/*  7 */ "...ee......"
+		/*  8 */ "..........."
+		/*  9 */ "..........."
+		/* 10 */ "..........."
+
+		// Level 5
+		/* z\x*             1 */
+		/*    *   01234567890 */
+		/*  0 */ "..........."
+		/*  1 */ ".....daa..."
+		/*  2 */ "...ccd....."
+		/*  3 */ "...bc......"
+		/*  4 */ "...b......."
+		/*  5 */ "..ff......."
+		/*  6 */ "..ee......."
+		/*  7 */ "..........."
+		/*  8 */ "..........."
+		/*  9 */ "..........."
+		/* 10 */ "..........."
+
+		// Level 6
+		/* z\x*             1 */
+		/*    *   01234567890 */
+		/*  0 */ "...aaa....."
+		/*  1 */ "..ddd......"
+		/*  2 */ ".cc........"
+		/*  3 */ ".bb........"
+		/*  4 */ ".ff........"
+		/*  5 */ ".e........."
+		/*  6 */ ".ee........"
+		/*  7 */ "..........."
+		/*  8 */ "..........."
+		/*  9 */ "..........."
+		/* 10 */ "..........."
+
+		// Level 7
+		/* z\x*             1 */
+		/*    *   01234567890 */
+		/*  0 */ "aaa........"
+		/*  1 */ "dd........."
+		/*  2 */ "cc........."
+		/*  3 */ "bb........."
+		/*  4 */ "ff........."
+		/*  5 */ "e.........."
+		/*  6 */ "..........."
+		/*  7 */ "..........."
+		/*  8 */ "..........."
+		/*  9 */ "..........."
+		/* 10 */ "...........",
+
+		// Connectors:
+		"-1: 0, 8, 5: 4\n"  /* Type -1, direction X- */
+		"1: 5, 1, 10: 3\n"  /* Type 1, direction Z+ */,
+
+		// AllowedRotations:
+		7,  /* 1, 2, 3 CCW rotation allowed */
+
+		// Merge strategy:
+		cBlockArea::msSpongePrint,
+
+		// ShouldExtendFloor:
+		false,
+
+		// DefaultWeight:
+		100,
+
+		// DepthWeight:
+		"",
+
+		// AddWeightIfSame:
+		0,
+
+		// MoveToGround:
+		false,
+	},  // CurveDownFromTopSingle
+
+
+
+	///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+	// CurveSingle:
+	// The data has been exported from the gallery Cube, area index 84, ID 462, created by Aloe_vera
+	{
+		// Size:
+		11, 1, 11,  // SizeX = 11, SizeY = 1, SizeZ = 11
+
+		// Hitbox (relative to bounding box):
+		0, -2, 0,  // MinX, MinY, MinZ
+		10, 2, 10,  // MaxX, MaxY, MaxZ
+
+		// Block definitions:
+		".:  0: 0\n"  /* air */
+		"a: 35:14\n"  /* wool */
+		"b: 35: 1\n"  /* wool */
+		"c: 35: 4\n"  /* wool */
+		"d: 35: 5\n"  /* wool */
+		"e: 35: 3\n"  /* wool */
+		"f: 35:11\n"  /* wool */
+		"m: 19: 0\n"  /* sponge */,
+
+		// Block data:
+		// Level 0
+		/* z\x*             1 */
+		/*    *   01234567890 */
+		/*  0 */ "aaaaaa....."
+		/*  1 */ "bbbbbbaa..."
+		/*  2 */ "cccccbbaa.."
+		/*  3 */ "ddddcccbaa."
+		/*  4 */ "eeedddccba."
+		/*  5 */ "ffeeeddcbba"
+		/*  6 */ ".fffeedccba"
+		/*  7 */ "...ffeddcba"
+		/*  8 */ "....feedcba"
+		/*  9 */ "....ffedcba"
+		/* 10 */ ".....fedcba",
+
+		// Connectors:
+		"-1: 0, 1, 5: 4\n"  /* Type -1, direction X- */
+		"1: 5, 1, 10: 3\n"  /* Type 1, direction Z+ */,
+
+		// AllowedRotations:
+		7,  /* 1, 2, 3 CCW rotation allowed */
+
+		// Merge strategy:
+		cBlockArea::msSpongePrint,
+
+		// ShouldExtendFloor:
+		false,
+
+		// DefaultWeight:
+		100,
+
+		// DepthWeight:
+		"",
+
+		// AddWeightIfSame:
+		0,
+
+		// MoveToGround:
+		false,
+	},  // CurveSingle
+
+
+
+	///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+	// CurveSingleLeft:
+	// The data has been exported from the gallery Cube, area index 97, ID 475, created by Aloe_vera
+	{
+		// Size:
+		11, 1, 11,  // SizeX = 11, SizeY = 1, SizeZ = 11
+
+		// Hitbox (relative to bounding box):
+		0, -2, 0,  // MinX, MinY, MinZ
+		10, 2, 10,  // MaxX, MaxY, MaxZ
+
+		// Block definitions:
+		".:  0: 0\n"  /* air */
+		"a: 35:14\n"  /* wool */
+		"b: 35: 1\n"  /* wool */
+		"c: 35: 4\n"  /* wool */
+		"d: 35: 5\n"  /* wool */
+		"e: 35: 3\n"  /* wool */
+		"f: 35:11\n"  /* wool */
+		"m: 19: 0\n"  /* sponge */,
+
+		// Block data:
+		// Level 0
+		/* z\x*             1 */
+		/*    *   01234567890 */
+		/*  0 */ ".....abcdef"
+		/*  1 */ "....aabcdef"
+		/*  2 */ "....abbcdef"
+		/*  3 */ "...aabccdef"
+		/*  4 */ ".aaabbcddef"
+		/*  5 */ "aabbbccdeef"
+		/*  6 */ "bbbcccddef."
+		/*  7 */ "ccccdddeff."
+		/*  8 */ "dddddeeff.."
+		/*  9 */ "eeeeeeff..."
+		/* 10 */ "ffffff.....",
+
+		// Connectors:
+		"-1: 0, 1, 10: 4\n"  /* Type -1, direction X- */
+		"1: 10, 1, 0: 2\n"  /* Type 1, direction Z- */,
+
+		// AllowedRotations:
+		7,  /* 1, 2, 3 CCW rotation allowed */
+
+		// Merge strategy:
+		cBlockArea::msSpongePrint,
+
+		// ShouldExtendFloor:
+		false,
+
+		// DefaultWeight:
+		100,
+
+		// DepthWeight:
+		"",
+
+		// AddWeightIfSame:
+		0,
+
+		// MoveToGround:
+		false,
+	},  // CurveSingleLeft
+
+
+
+	///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+	// CurveUpDouble:
+	// The data has been exported from the gallery Cube, area index 92, ID 470, created by Aloe_vera
+	{
+		// Size:
+		14, 8, 14,  // SizeX = 14, SizeY = 8, SizeZ = 14
+
+		// Hitbox (relative to bounding box):
+		0, -2, 0,  // MinX, MinY, MinZ
+		13, 9, 13,  // MaxX, MaxY, MaxZ
+
+		// Block definitions:
+		".:  0: 0\n"  /* air */
+		"a: 35:11\n"  /* wool */
+		"b: 35: 3\n"  /* wool */
+		"c: 35: 5\n"  /* wool */
+		"d: 35: 4\n"  /* wool */
+		"e: 35: 1\n"  /* wool */
+		"f: 35:14\n"  /* wool */
+		"m: 19: 0\n"  /* sponge */,
+
+		// Block data:
+		// Level 0
+		/* z\x*             1111 */
+		/*    *   01234567890123 */
+		/*  0 */ "a............."
+		/*  1 */ "b............."
+		/*  2 */ "c............."
+		/*  3 */ "d............."
+		/*  4 */ "e............."
+		/*  5 */ "f............."
+		/*  6 */ "f............."
+		/*  7 */ "e............."
+		/*  8 */ "d............."
+		/*  9 */ "c............."
+		/* 10 */ "b............."
+		/* 11 */ "a............."
+		/* 12 */ ".............."
+		/* 13 */ ".............."
+
+		// Level 1
+		/* z\x*             1111 */
+		/*    *   01234567890123 */
+		/*  0 */ ".aa..........."
+		/*  1 */ ".bb..........."
+		/*  2 */ ".cc..........."
+		/*  3 */ ".dd..........."
+		/*  4 */ ".ee..........."
+		/*  5 */ ".f............"
+		/*  6 */ ".f............"
+		/*  7 */ ".e............"
+		/*  8 */ ".d............"
+		/*  9 */ ".c............"
+		/* 10 */ ".b............"
+		/* 11 */ ".b............"
+		/* 12 */ ".............."
+		/* 13 */ ".............."
+
+		// Level 2
+		/* z\x*             1111 */
+		/*    *   01234567890123 */
+		/*  0 */ "...aaa........"
+		/*  1 */ "...bb........."
+		/*  2 */ "...cc........."
+		/*  3 */ "...dd........."
+		/*  4 */ "...ee........."
+		/*  5 */ "..ff.........."
+		/*  6 */ "..ff.........."
+		/*  7 */ "..ee.........."
+		/*  8 */ "..de.........."
+		/*  9 */ "..c..........."
+		/* 10 */ ".b............"
+		/* 11 */ ".b............"
+		/* 12 */ ".............."
+		/* 13 */ ".............."
+
+		// Level 3
+		/* z\x*             1111 */
+		/*    *   01234567890123 */
+		/*  0 */ ".............."
+		/*  1 */ ".....baa......"
+		/*  2 */ ".....bbaaa...."
+		/*  3 */ "....dccbba...."
+		/*  4 */ "....eddcc....."
+		/*  5 */ "....fedd......"
+		/*  6 */ "....ffee......"
+		/*  7 */ "....ff........"
+		/*  8 */ "....e........."
+		/*  9 */ "...dd........."
+		/* 10 */ "..cc.........."
+		/* 11 */ "..b..........."
+		/* 12 */ ".a............"
+		/* 13 */ ".............."
+
+		// Level 4
+		/* z\x*             1111 */
+		/*    *   01234567890123 */
+		/*  0 */ ".............."
+		/*  1 */ ".............."
+		/*  2 */ ".............."
+		/*  3 */ "..........a..."
+		/*  4 */ ".........ba..."
+		/*  5 */ "........cc...."
+		/*  6 */ ".......edc...."
+		/*  7 */ "......fedd...."
+		/*  8 */ ".....ff......."
+		/*  9 */ "....de........"
+		/* 10 */ "...cde........"
+		/* 11 */ "..b..........."
+		/* 12 */ ".a............"
+		/* 13 */ ".............."
+
+		// Level 5
+		/* z\x*             1111 */
+		/*    *   01234567890123 */
+		/*  0 */ ".............."
+		/*  1 */ ".............."
+		/*  2 */ ".............."
+		/*  3 */ ".............."
+		/*  4 */ "...........a.."
+		/*  5 */ "..........ba.."
+		/*  6 */ "..........baa."
+		/*  7 */ "..........cba."
+		/*  8 */ ".......fedcb.."
+		/*  9 */ "......fffed..."
+		/* 10 */ ".....eef......"
+		/* 11 */ "...ccd........"
+		/* 12 */ "..b..........."
+		/* 13 */ ".............."
+
+		// Level 6
+		/* z\x*             1111 */
+		/*    *   01234567890123 */
+		/*  0 */ ".............."
+		/*  1 */ ".............."
+		/*  2 */ ".............."
+		/*  3 */ ".............."
+		/*  4 */ ".............."
+		/*  5 */ ".............."
+		/*  6 */ ".............."
+		/*  7 */ ".............."
+		/*  8 */ "............ba"
+		/*  9 */ "...........cba"
+		/* 10 */ "........fedcba"
+		/* 11 */ "......effedc.."
+		/* 12 */ "..bbcdef......"
+		/* 13 */ "..a..........."
+
+		// Level 7
+		/* z\x*             1111 */
+		/*    *   01234567890123 */
+		/*  0 */ ".............."
+		/*  1 */ ".............."
+		/*  2 */ ".............."
+		/*  3 */ ".............."
+		/*  4 */ ".............."
+		/*  5 */ ".............."
+		/*  6 */ ".............."
+		/*  7 */ ".............."
+		/*  8 */ ".............."
+		/*  9 */ ".............."
+		/* 10 */ ".............."
+		/* 11 */ "............ba"
+		/* 12 */ "........fedcba"
+		/* 13 */ "..abcdeffedcba",
+
+		// Connectors:
+		"-2: 0, 1, 11: 4\n"  /* Type -2, direction X- */
+		"2: 0, 1, 0: 4\n"  /* Type 2, direction X- */
+		"2: 2, 8, 13: 3\n"  /* Type 2, direction Z+ */
+		"-2: 13, 8, 13: 3\n"  /* Type -2, direction Z+ */,
+
+		// AllowedRotations:
+		7,  /* 1, 2, 3 CCW rotation allowed */
+
+		// Merge strategy:
+		cBlockArea::msSpongePrint,
+
+		// ShouldExtendFloor:
+		false,
+
+		// DefaultWeight:
+		100,
+
+		// DepthWeight:
+		"",
+
+		// AddWeightIfSame:
+		0,
+
+		// MoveToGround:
+		false,
+	},  // CurveUpDouble
+
+
+
+	///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+	// CurveUpSingle:
+	// The data has been exported from the gallery Cube, area index 87, ID 465, created by Aloe_vera
+	{
+		// Size:
+		11, 8, 11,  // SizeX = 11, SizeY = 8, SizeZ = 11
+
+		// Hitbox (relative to bounding box):
+		0, -2, 0,  // MinX, MinY, MinZ
+		10, 9, 10,  // MaxX, MaxY, MaxZ
+
+		// Block definitions:
+		".:  0: 0\n"  /* air */
+		"a: 35:14\n"  /* wool */
+		"b: 35: 1\n"  /* wool */
+		"c: 35: 4\n"  /* wool */
+		"d: 35: 5\n"  /* wool */
+		"e: 35: 3\n"  /* wool */
+		"f: 35:11\n"  /* wool */
+		"m: 19: 0\n"  /* sponge */,
+
+		// Block data:
+		// Level 0
+		/* z\x*             1 */
+		/*    *   01234567890 */
+		/*  0 */ "aaa........"
+		/*  1 */ "bb........."
+		/*  2 */ "cc........."
+		/*  3 */ "dd........."
+		/*  4 */ "ee........."
+		/*  5 */ "f.........."
+		/*  6 */ "..........."
+		/*  7 */ "..........."
+		/*  8 */ "..........."
+		/*  9 */ "..........."
+		/* 10 */ "..........."
+
+		// Level 1
+		/* z\x*             1 */
+		/*    *   01234567890 */
+		/*  0 */ "...aaa....."
+		/*  1 */ "..bbb......"
+		/*  2 */ ".cc........"
+		/*  3 */ ".dd........"
+		/*  4 */ ".ee........"
+		/*  5 */ ".f........."
+		/*  6 */ ".ff........"
+		/*  7 */ "..........."
+		/*  8 */ "..........."
+		/*  9 */ "..........."
+		/* 10 */ "..........."
+
+		// Level 2
+		/* z\x*             1 */
+		/*    *   01234567890 */
+		/*  0 */ "..........."
+		/*  1 */ ".....baa..."
+		/*  2 */ "...ccb....."
+		/*  3 */ "...dc......"
+		/*  4 */ "...d......."
+		/*  5 */ "..ee......."
+		/*  6 */ "..ff......."
+		/*  7 */ "..........."
+		/*  8 */ "..........."
+		/*  9 */ "..........."
+		/* 10 */ "..........."
+
+		// Level 3
+		/* z\x*             1 */
+		/*    *   01234567890 */
+		/*  0 */ "..........."
+		/*  1 */ "..........."
+		/*  2 */ "......baa.."
+		/*  3 */ ".....ccb..."
+		/*  4 */ "....dd....."
+		/*  5 */ "....e......"
+		/*  6 */ "...fe......"
+		/*  7 */ "...ff......"
+		/*  8 */ "..........."
+		/*  9 */ "..........."
+		/* 10 */ "..........."
+
+		// Level 4
+		/* z\x*             1 */
+		/*    *   01234567890 */
+		/*  0 */ "..........."
+		/*  1 */ "..........."
+		/*  2 */ "..........."
+		/*  3 */ "........aa."
+		/*  4 */ "......ccb.."
+		/*  5 */ ".....dd...."
+		/*  6 */ ".....e....."
+		/*  7 */ "....fe....."
+		/*  8 */ "....f......"
+		/*  9 */ "..........."
+		/* 10 */ "..........."
+
+		// Level 5
+		/* z\x*             1 */
+		/*    *   01234567890 */
+		/*  0 */ "..........."
+		/*  1 */ "..........."
+		/*  2 */ "..........."
+		/*  3 */ "..........."
+		/*  4 */ ".........a."
+		/*  5 */ ".......cbba"
+		/*  6 */ "......dc..."
+		/*  7 */ "......d...."
+		/*  8 */ ".....ee...."
+		/*  9 */ "....ff....."
+		/* 10 */ "..........."
+
+		// Level 6
+		/* z\x*             1 */
+		/*    *   01234567890 */
+		/*  0 */ "..........."
+		/*  1 */ "..........."
+		/*  2 */ "..........."
+		/*  3 */ "..........."
+		/*  4 */ "..........."
+		/*  5 */ "..........."
+		/*  6 */ "........cba"
+		/*  7 */ ".......dcba"
+		/*  8 */ ".......dcb."
+		/*  9 */ ".....fe...."
+		/* 10 */ ".....f....."
+
+		// Level 7
+		/* z\x*             1 */
+		/*    *   01234567890 */
+		/*  0 */ "..........."
+		/*  1 */ "..........."
+		/*  2 */ "..........."
+		/*  3 */ "..........."
+		/*  4 */ "..........."
+		/*  5 */ "..........."
+		/*  6 */ "..........."
+		/*  7 */ "..........."
+		/*  8 */ "..........a"
+		/*  9 */ ".......dcba"
+		/* 10 */ ".....fedcba",
+
+		// Connectors:
+		"-1: 0, 1, 5: 4\n"  /* Type -1, direction X- */
+		"1: 5, 8, 10: 3\n"  /* Type 1, direction Z+ */,
+
+		// AllowedRotations:
+		7,  /* 1, 2, 3 CCW rotation allowed */
+
+		// Merge strategy:
+		cBlockArea::msSpongePrint,
+
+		// ShouldExtendFloor:
+		false,
+
+		// DefaultWeight:
+		100,
+
+		// DepthWeight:
+		"",
+
+		// AddWeightIfSame:
+		0,
+
+		// MoveToGround:
+		false,
+	},  // CurveUpSingle
+
+
+
+	///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+	// SlopeDownFromTopSingle:
+	// The data has been exported from the gallery Cube, area index 98, ID 476, created by Aloe_vera
+	{
+		// Size:
+		16, 8, 6,  // SizeX = 16, SizeY = 8, SizeZ = 6
+
+		// Hitbox (relative to bounding box):
+		0, -2, 0,  // MinX, MinY, MinZ
+		15, 9, 5,  // MaxX, MaxY, MaxZ
+
+		// Block definitions:
+		".:  0: 0\n"  /* air */
+		"a: 35:14\n"  /* wool */
+		"b: 35: 1\n"  /* wool */
+		"c: 35: 4\n"  /* wool */
+		"d: 35: 5\n"  /* wool */
+		"e: 35: 3\n"  /* wool */
+		"f: 35:11\n"  /* wool */
+		"m: 19: 0\n"  /* sponge */,
+
+		// Block data:
+		// Level 0
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "..............aa"
+		/*  1 */ "..............bb"
+		/*  2 */ "..............cc"
+		/*  3 */ "..............dd"
+		/*  4 */ "..............ee"
+		/*  5 */ "..............ff"
+
+		// Level 1
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "............aa.."
+		/*  1 */ "............bb.."
+		/*  2 */ "............cc.."
+		/*  3 */ "............dd.."
+		/*  4 */ "............ee.."
+		/*  5 */ "............ff.."
+
+		// Level 2
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "..........aa...."
+		/*  1 */ "..........bb...."
+		/*  2 */ "..........cc...."
+		/*  3 */ "..........dd...."
+		/*  4 */ "..........ee...."
+		/*  5 */ "..........ff...."
+
+		// Level 3
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "........aa......"
+		/*  1 */ "........bb......"
+		/*  2 */ "........cc......"
+		/*  3 */ "........dd......"
+		/*  4 */ "........ee......"
+		/*  5 */ "........ff......"
+
+		// Level 4
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "......aa........"
+		/*  1 */ "......bb........"
+		/*  2 */ "......cc........"
+		/*  3 */ "......dd........"
+		/*  4 */ "......ee........"
+		/*  5 */ "......ff........"
+
+		// Level 5
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "....aa.........."
+		/*  1 */ "....bb.........."
+		/*  2 */ "....cc.........."
+		/*  3 */ "....dd.........."
+		/*  4 */ "....ee.........."
+		/*  5 */ "....ff.........."
+
+		// Level 6
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "..aa............"
+		/*  1 */ "..bb............"
+		/*  2 */ "..cc............"
+		/*  3 */ "..dd............"
+		/*  4 */ "..ee............"
+		/*  5 */ "..ff............"
+
+		// Level 7
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "aa.............."
+		/*  1 */ "bb.............."
+		/*  2 */ "cc.............."
+		/*  3 */ "dd.............."
+		/*  4 */ "ee.............."
+		/*  5 */ "ff..............",
+
+		// Connectors:
+		"-1: 0, 8, 5: 4\n"  /* Type -1, direction X- */
+		"1: 15, 1, 5: 5\n"  /* Type 1, direction X+ */,
+
+		// AllowedRotations:
+		7,  /* 1, 2, 3 CCW rotation allowed */
+
+		// Merge strategy:
+		cBlockArea::msSpongePrint,
+
+		// ShouldExtendFloor:
+		false,
+
+		// DefaultWeight:
+		100,
+
+		// DepthWeight:
+		"",
+
+		// AddWeightIfSame:
+		0,
+
+		// MoveToGround:
+		false,
+	},  // SlopeDownFromTopSingle
+
+
+
+	///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+	// SlopeUpDouble:
+	// The data has been exported from the gallery Cube, area index 90, ID 468, created by Aloe_vera
+	{
+		// Size:
+		16, 8, 12,  // SizeX = 16, SizeY = 8, SizeZ = 12
+
+		// Hitbox (relative to bounding box):
+		0, -2, 0,  // MinX, MinY, MinZ
+		15, 9, 11,  // MaxX, MaxY, MaxZ
+
+		// Block definitions:
+		".:  0: 0\n"  /* air */
+		"a: 35:11\n"  /* wool */
+		"b: 35: 3\n"  /* wool */
+		"c: 35: 5\n"  /* wool */
+		"d: 35: 4\n"  /* wool */
+		"e: 35: 1\n"  /* wool */
+		"f: 35:14\n"  /* wool */
+		"m: 19: 0\n"  /* sponge */,
+
+		// Block data:
+		// Level 0
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "aa.............."
+		/*  1 */ "bb.............."
+		/*  2 */ "cc.............."
+		/*  3 */ "dd.............."
+		/*  4 */ "ee.............."
+		/*  5 */ "ff.............."
+		/*  6 */ "ff.............."
+		/*  7 */ "ee.............."
+		/*  8 */ "dd.............."
+		/*  9 */ "cc.............."
+		/* 10 */ "bb.............."
+		/* 11 */ "aa.............."
+
+		// Level 1
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "..aa............"
+		/*  1 */ "..bb............"
+		/*  2 */ "..cc............"
+		/*  3 */ "..dd............"
+		/*  4 */ "..ee............"
+		/*  5 */ "..ff............"
+		/*  6 */ "..ff............"
+		/*  7 */ "..ee............"
+		/*  8 */ "..dd............"
+		/*  9 */ "..cc............"
+		/* 10 */ "..bb............"
+		/* 11 */ "..aa............"
+
+		// Level 2
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "....aa.........."
+		/*  1 */ "....bb.........."
+		/*  2 */ "....cc.........."
+		/*  3 */ "....dd.........."
+		/*  4 */ "....ee.........."
+		/*  5 */ "....ff.........."
+		/*  6 */ "....ff.........."
+		/*  7 */ "....ee.........."
+		/*  8 */ "....dd.........."
+		/*  9 */ "....cc.........."
+		/* 10 */ "....bb.........."
+		/* 11 */ "....aa.........."
+
+		// Level 3
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "......aa........"
+		/*  1 */ "......bb........"
+		/*  2 */ "......cc........"
+		/*  3 */ "......dd........"
+		/*  4 */ "......ee........"
+		/*  5 */ "......ff........"
+		/*  6 */ "......ff........"
+		/*  7 */ "......ee........"
+		/*  8 */ "......dd........"
+		/*  9 */ "......cc........"
+		/* 10 */ "......bb........"
+		/* 11 */ "......aa........"
+
+		// Level 4
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "........aa......"
+		/*  1 */ "........bb......"
+		/*  2 */ "........cc......"
+		/*  3 */ "........dd......"
+		/*  4 */ "........ee......"
+		/*  5 */ "........ff......"
+		/*  6 */ "........ff......"
+		/*  7 */ "........ee......"
+		/*  8 */ "........dd......"
+		/*  9 */ "........cc......"
+		/* 10 */ "........bb......"
+		/* 11 */ "........aa......"
+
+		// Level 5
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "..........aa...."
+		/*  1 */ "..........bb...."
+		/*  2 */ "..........cc...."
+		/*  3 */ "..........dd...."
+		/*  4 */ "..........ee...."
+		/*  5 */ "..........ff...."
+		/*  6 */ "..........ff...."
+		/*  7 */ "..........ee...."
+		/*  8 */ "..........dd...."
+		/*  9 */ "..........cc...."
+		/* 10 */ "..........bb...."
+		/* 11 */ "..........aa...."
+
+		// Level 6
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "............aa.."
+		/*  1 */ "............bb.."
+		/*  2 */ "............cc.."
+		/*  3 */ "............dd.."
+		/*  4 */ "............ee.."
+		/*  5 */ "............ff.."
+		/*  6 */ "............ff.."
+		/*  7 */ "............ee.."
+		/*  8 */ "............dd.."
+		/*  9 */ "............cc.."
+		/* 10 */ "............bb.."
+		/* 11 */ "............aa.."
+
+		// Level 7
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "..............aa"
+		/*  1 */ "..............bb"
+		/*  2 */ "..............cc"
+		/*  3 */ "..............dd"
+		/*  4 */ "..............ee"
+		/*  5 */ "..............ff"
+		/*  6 */ "..............ff"
+		/*  7 */ "..............ee"
+		/*  8 */ "..............dd"
+		/*  9 */ "..............cc"
+		/* 10 */ "..............bb"
+		/* 11 */ "..............aa",
+
+		// Connectors:
+		"-2: 0, 1, 11: 4\n"  /* Type -2, direction X- */
+		"2: 0, 1, 0: 4\n"  /* Type 2, direction X- */
+		"-2: 15, 8, 0: 5\n"  /* Type -2, direction X+ */
+		"2: 15, 8, 11: 5\n"  /* Type 2, direction X+ */,
+
+		// AllowedRotations:
+		7,  /* 1, 2, 3 CCW rotation allowed */
+
+		// Merge strategy:
+		cBlockArea::msSpongePrint,
+
+		// ShouldExtendFloor:
+		false,
+
+		// DefaultWeight:
+		100,
+
+		// DepthWeight:
+		"",
+
+		// AddWeightIfSame:
+		0,
+
+		// MoveToGround:
+		false,
+	},  // SlopeUpDouble
+
+
+
+	///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+	// SlopeUpSingle:
+	// The data has been exported from the gallery Cube, area index 85, ID 463, created by Aloe_vera
+	{
+		// Size:
+		16, 8, 6,  // SizeX = 16, SizeY = 8, SizeZ = 6
+
+		// Hitbox (relative to bounding box):
+		0, -2, 0,  // MinX, MinY, MinZ
+		15, 9, 5,  // MaxX, MaxY, MaxZ
+
+		// Block definitions:
+		".:  0: 0\n"  /* air */
+		"a: 35:14\n"  /* wool */
+		"b: 35: 1\n"  /* wool */
+		"c: 35: 4\n"  /* wool */
+		"d: 35: 5\n"  /* wool */
+		"e: 35: 3\n"  /* wool */
+		"f: 35:11\n"  /* wool */
+		"m: 19: 0\n"  /* sponge */,
+
+		// Block data:
+		// Level 0
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "aa.............."
+		/*  1 */ "bb.............."
+		/*  2 */ "cc.............."
+		/*  3 */ "dd.............."
+		/*  4 */ "ee.............."
+		/*  5 */ "ff.............."
+
+		// Level 1
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "..aa............"
+		/*  1 */ "..bb............"
+		/*  2 */ "..cc............"
+		/*  3 */ "..dd............"
+		/*  4 */ "..ee............"
+		/*  5 */ "..ff............"
+
+		// Level 2
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "....aa.........."
+		/*  1 */ "....bb.........."
+		/*  2 */ "....cc.........."
+		/*  3 */ "....dd.........."
+		/*  4 */ "....ee.........."
+		/*  5 */ "....ff.........."
+
+		// Level 3
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "......aa........"
+		/*  1 */ "......bb........"
+		/*  2 */ "......cc........"
+		/*  3 */ "......dd........"
+		/*  4 */ "......ee........"
+		/*  5 */ "......ff........"
+
+		// Level 4
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "........aa......"
+		/*  1 */ "........bb......"
+		/*  2 */ "........cc......"
+		/*  3 */ "........dd......"
+		/*  4 */ "........ee......"
+		/*  5 */ "........ff......"
+
+		// Level 5
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "..........aa...."
+		/*  1 */ "..........bb...."
+		/*  2 */ "..........cc...."
+		/*  3 */ "..........dd...."
+		/*  4 */ "..........ee...."
+		/*  5 */ "..........ff...."
+
+		// Level 6
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "............aa.."
+		/*  1 */ "............bb.."
+		/*  2 */ "............cc.."
+		/*  3 */ "............dd.."
+		/*  4 */ "............ee.."
+		/*  5 */ "............ff.."
+
+		// Level 7
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "..............aa"
+		/*  1 */ "..............bb"
+		/*  2 */ "..............cc"
+		/*  3 */ "..............dd"
+		/*  4 */ "..............ee"
+		/*  5 */ "..............ff",
+
+		// Connectors:
+		"-1: 0, 1, 5: 4\n"  /* Type -1, direction X- */
+		"1: 15, 8, 5: 5\n"  /* Type 1, direction X+ */,
+
+		// AllowedRotations:
+		7,  /* 1, 2, 3 CCW rotation allowed */
+
+		// Merge strategy:
+		cBlockArea::msSpongePrint,
+
+		// ShouldExtendFloor:
+		false,
+
+		// DefaultWeight:
+		100,
+
+		// DepthWeight:
+		"",
+
+		// AddWeightIfSame:
+		-1000,
+
+		// MoveToGround:
+		false,
+	},  // SlopeUpSingle
+
+
+
+	///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+	// SplitTee:
+	// The data has been exported from the gallery Cube, area index 93, ID 471, created by Aloe_vera
+	{
+		// Size:
+		16, 1, 14,  // SizeX = 16, SizeY = 1, SizeZ = 14
+
+		// Hitbox (relative to bounding box):
+		0, -2, 0,  // MinX, MinY, MinZ
+		15, 2, 13,  // MaxX, MaxY, MaxZ
+
+		// Block definitions:
+		".:  0: 0\n"  /* air */
+		"a: 35:11\n"  /* wool */
+		"b: 35: 3\n"  /* wool */
+		"c: 35: 5\n"  /* wool */
+		"d: 35: 4\n"  /* wool */
+		"e: 35: 1\n"  /* wool */
+		"f: 35:14\n"  /* wool */
+		"m: 19: 0\n"  /* sponge */,
+
+		// Block data:
+		// Level 0
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "aaaaaa.........."
+		/*  1 */ "bbbbbbaaa......."
+		/*  2 */ "ccccccbbbaaa...."
+		/*  3 */ "ddddddcccbbbaaaa"
+		/*  4 */ "eeeeeedddcccbbbb"
+		/*  5 */ "ffffffeeedddcccc"
+		/*  6 */ "fffffffffeeedddd"
+		/*  7 */ "eeeeff...fffeeee"
+		/*  8 */ "dddeeff.....ffff"
+		/*  9 */ "cccddeff........"
+		/* 10 */ "bbbccdeef......."
+		/* 11 */ "aaabbcddef......"
+		/* 12 */ "...aabcddef....."
+		/* 13 */ ".....abcdef.....",
+
+		// Connectors:
+		"-2: 0, 1, 11: 4\n"  /* Type -2, direction X- */
+		"2: 0, 1, 0: 4\n"  /* Type 2, direction X- */
+		"-1: 15, 1, 3: 5\n"  /* Type -1, direction X+ */
+		"1: 5, 1, 13: 3\n"  /* Type 1, direction Z+ */,
+
+		// AllowedRotations:
+		7,  /* 1, 2, 3 CCW rotation allowed */
+
+		// Merge strategy:
+		cBlockArea::msSpongePrint,
+
+		// ShouldExtendFloor:
+		false,
+
+		// DefaultWeight:
+		100,
+
+		// DepthWeight:
+		"",
+
+		// AddWeightIfSame:
+		0,
+
+		// MoveToGround:
+		false,
+	},  // SplitTee
+
+
+
+	///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+	// StraightDouble:
+	// The data has been exported from the gallery Cube, area index 88, ID 466, created by Aloe_vera
+	{
+		// Size:
+		16, 1, 12,  // SizeX = 16, SizeY = 1, SizeZ = 12
+
+		// Hitbox (relative to bounding box):
+		0, -2, 0,  // MinX, MinY, MinZ
+		15, 2, 11,  // MaxX, MaxY, MaxZ
+
+		// Block definitions:
+		".:  0: 0\n"  /* air */
+		"a: 35:11\n"  /* wool */
+		"b: 35: 3\n"  /* wool */
+		"c: 35: 5\n"  /* wool */
+		"d: 35: 4\n"  /* wool */
+		"e: 35: 1\n"  /* wool */
+		"f: 35:14\n"  /* wool */
+		"m: 19: 0\n"  /* sponge */,
+
+		// Block data:
+		// Level 0
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "aaaaaaaaaaaaaaaa"
+		/*  1 */ "bbbbbbbbbbbbbbbb"
+		/*  2 */ "cccccccccccccccc"
+		/*  3 */ "dddddddddddddddd"
+		/*  4 */ "eeeeeeeeeeeeeeee"
+		/*  5 */ "ffffffffffffffff"
+		/*  6 */ "ffffffffffffffff"
+		/*  7 */ "eeeeeeeeeeeeeeee"
+		/*  8 */ "dddddddddddddddd"
+		/*  9 */ "cccccccccccccccc"
+		/* 10 */ "bbbbbbbbbbbbbbbb"
+		/* 11 */ "aaaaaaaaaaaaaaaa",
+
+		// Connectors:
+		"-2: 0, 1, 11: 4\n"  /* Type -2, direction X- */
+		"2: 0, 1, 0: 4\n"  /* Type 2, direction X- */
+		"-2: 15, 1, 0: 5\n"  /* Type -2, direction X+ */
+		"2: 15, 1, 11: 5\n"  /* Type 2, direction X+ */,
+
+		// AllowedRotations:
+		7,  /* 1, 2, 3 CCW rotation allowed */
+
+		// Merge strategy:
+		cBlockArea::msSpongePrint,
+
+		// ShouldExtendFloor:
+		false,
+
+		// DefaultWeight:
+		100,
+
+		// DepthWeight:
+		"",
+
+		// AddWeightIfSame:
+		0,
+
+		// MoveToGround:
+		false,
+	},  // StraightDouble
+};  // g_RainbowRoadPrefabs
+
+
+
+
+
+
+const cPrefab::sDef g_RainbowRoadStartingPrefabs[] =
+{
+	///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+	// StraightSingle:
+	// The data has been exported from the gallery Cube, area index 83, ID 461, created by Aloe_vera
+	{
+		// Size:
+		16, 1, 6,  // SizeX = 16, SizeY = 1, SizeZ = 6
+
+		// Hitbox (relative to bounding box):
+		0, -2, 0,  // MinX, MinY, MinZ
+		15, 2, 5,  // MaxX, MaxY, MaxZ
+
+		// Block definitions:
+		".:  0: 0\n"  /* air */
+		"a: 35:14\n"  /* wool */
+		"b: 35: 1\n"  /* wool */
+		"c: 35: 4\n"  /* wool */
+		"d: 35: 5\n"  /* wool */
+		"e: 35: 3\n"  /* wool */
+		"f: 35:11\n"  /* wool */
+		"m: 19: 0\n"  /* sponge */,
+
+		// Block data:
+		// Level 0
+		/* z\x*             111111 */
+		/*    *   0123456789012345 */
+		/*  0 */ "aaaaaaaaaaaaaaaa"
+		/*  1 */ "bbbbbbbbbbbbbbbb"
+		/*  2 */ "cccccccccccccccc"
+		/*  3 */ "dddddddddddddddd"
+		/*  4 */ "eeeeeeeeeeeeeeee"
+		/*  5 */ "ffffffffffffffff",
+
+		// Connectors:
+		"-1: 0, 1, 5: 4\n"  /* Type -1, direction X- */
+		"1: 15, 1, 5: 5\n"  /* Type 1, direction X+ */,
+
+		// AllowedRotations:
+		7,  /* 1, 2, 3 CCW rotation allowed */
+
+		// Merge strategy:
+		cBlockArea::msSpongePrint,
+
+		// ShouldExtendFloor:
+		false,
+
+		// DefaultWeight:
+		100,
+
+		// DepthWeight:
+		"",
+
+		// AddWeightIfSame:
+		500,
+
+		// MoveToGround:
+		false,
+	},  // StraightSingle
+};
+
+
+
+
+
+// The prefab counts:
+
+const size_t g_RainbowRoadPrefabsCount = ARRAYCOUNT(g_RainbowRoadPrefabs);
+
+const size_t g_RainbowRoadStartingPrefabsCount = ARRAYCOUNT(g_RainbowRoadStartingPrefabs);
+
diff --git a/src/Generating/Prefabs/RainbowRoadPrefabs.h b/src/Generating/Prefabs/RainbowRoadPrefabs.h
new file mode 100644
index 000000000..ab0a0fbb2
--- /dev/null
+++ b/src/Generating/Prefabs/RainbowRoadPrefabs.h
@@ -0,0 +1,15 @@
+
+// RainbowRoadPrefabs.h
+
+// Declares the prefabs in the group RainbowRoad
+
+#include "../Prefab.h"
+
+
+
+
+
+extern const cPrefab::sDef g_RainbowRoadPrefabs[];
+extern const cPrefab::sDef g_RainbowRoadStartingPrefabs[];
+extern const size_t g_RainbowRoadPrefabsCount;
+extern const size_t g_RainbowRoadStartingPrefabsCount;
diff --git a/src/Generating/RainbowRoadsGen.cpp b/src/Generating/RainbowRoadsGen.cpp
new file mode 100644
index 000000000..d1e1f4bda
--- /dev/null
+++ b/src/Generating/RainbowRoadsGen.cpp
@@ -0,0 +1,115 @@
+
+// RainbowRoadsGen.cpp
+
+// Implements the cRainbowRoadsGen class representing the rainbow road generator
+
+#include "Globals.h"
+#include "RainbowRoadsGen.h"
+#include "Prefabs/RainbowRoadPrefabs.h"
+#include "PieceGenerator.h"
+
+
+
+
+
+static cPrefabPiecePool g_RainbowRoads(g_RainbowRoadPrefabs, g_RainbowRoadPrefabsCount, g_RainbowRoadStartingPrefabs, g_RainbowRoadStartingPrefabsCount);
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cRainbowRoadsGen::cRainbowRoads:
+
+class cRainbowRoadsGen::cRainbowRoads :
+	public cGridStructGen::cStructure
+{
+	typedef cGridStructGen::cStructure super;
+	
+public:
+	cRainbowRoads(
+		int a_Seed,
+		int a_OriginX, int a_OriginZ,
+		int a_MaxDepth,
+		int a_MaxSize
+	) :
+		super(a_OriginX, a_OriginZ),
+		m_Seed(a_Seed),
+		m_Noise(a_Seed),
+		m_MaxSize(a_MaxSize),
+		m_Borders(a_OriginX - a_MaxSize, 0, a_OriginZ - a_MaxSize, a_OriginX + a_MaxSize, 255, a_OriginZ + a_MaxSize)
+	{
+		// Generate the pieces for this base:
+		cBFSPieceGenerator pg(g_RainbowRoads, a_Seed);
+		pg.PlacePieces(a_OriginX, 190, a_OriginZ, a_MaxDepth, m_Pieces);
+		if (m_Pieces.empty())
+		{
+			return;
+		}
+	}
+	
+	~cRainbowRoads()
+	{
+		cPieceGenerator::FreePieces(m_Pieces);
+	}
+	
+protected:
+	/** Seed for the random functions */
+	int m_Seed;
+	
+	/** The noise used as a pseudo-random generator */
+	cNoise m_Noise;
+	
+	/** Maximum size, in X/Z blocks, of the village (radius from the origin) */
+	int m_MaxSize;
+	
+	/** Borders of the vilalge - no item may reach out of this cuboid. */
+	cCuboid m_Borders;
+	
+	/** The village pieces, placed by the generator. */
+	cPlacedPieces m_Pieces;
+	
+	
+	// cGridStructGen::cStructure overrides:
+	virtual void DrawIntoChunk(cChunkDesc & a_Chunk) override
+	{
+		for (cPlacedPieces::iterator itr = m_Pieces.begin(), end = m_Pieces.end(); itr != end; ++itr)
+		{
+			cPrefab & Prefab = (cPrefab &)((*itr)->GetPiece());
+			Prefab.Draw(a_Chunk, *itr);
+		}  // for itr - m_PlacedPieces[]
+	}
+} ;
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cRainbowRoadsGen:
+
+
+
+
+
+cRainbowRoadsGen::cRainbowRoadsGen(int a_Seed, int a_GridSize, int a_MaxDepth, int a_MaxSize) :
+	super(a_Seed, a_GridSize, a_GridSize, a_MaxSize, a_MaxSize, 100),
+	m_Noise(a_Seed + 9000),
+	m_MaxDepth(a_MaxDepth),
+	m_MaxSize(a_MaxSize)
+{
+}
+
+
+
+
+
+cGridStructGen::cStructurePtr cRainbowRoadsGen::CreateStructure(int a_OriginX, int a_OriginZ)
+{
+	// Create a base based on the chosen prefabs:
+	return cStructurePtr(new cRainbowRoads(m_Seed, a_OriginX, a_OriginZ, m_MaxDepth, m_MaxSize));
+}
+
+
+
+
diff --git a/src/Generating/RainbowRoadsGen.h b/src/Generating/RainbowRoadsGen.h
new file mode 100644
index 000000000..acbd5abf9
--- /dev/null
+++ b/src/Generating/RainbowRoadsGen.h
@@ -0,0 +1,47 @@
+
+// RainbowRoadsGen.h
+
+// Declares the cRainbowRoadsGen class representing the underwater base generator
+
+
+
+
+
+#pragma once
+
+#include "GridStructGen.h"
+#include "PrefabPiecePool.h"
+
+
+
+
+
+class cRainbowRoadsGen :
+	public cGridStructGen
+{
+	typedef cGridStructGen super;
+	
+public:
+	cRainbowRoadsGen(int a_Seed, int a_GridSize, int a_MaxDepth, int a_MaxSize);
+
+protected:
+	class cRainbowRoads;  // fwd: RainbowRoadsGen.cpp
+
+
+	/** The noise used for generating random numbers */
+	cNoise m_Noise;
+	
+	/** Maximum depth of the generator tree*/
+	int m_MaxDepth;
+	
+	/** Maximum size, in X/Z blocks, of the base (radius from the origin) */
+	int m_MaxSize;
+
+
+	// cGridStructGen overrides:
+	virtual cStructurePtr CreateStructure(int a_OriginX, int a_OriginZ) override;
+} ;
+
+
+
+
diff --git a/src/Items/ItemBoat.h b/src/Items/ItemBoat.h
index 42f4ffc8f..7faac1e32 100644
--- a/src/Items/ItemBoat.h
+++ b/src/Items/ItemBoat.h
@@ -75,7 +75,7 @@ public:
 		double z = Callbacks.m_Pos.z;
 		
 		cBoat * Boat = new cBoat(x + 0.5, y + 1, z + 0.5);
-		Boat->Initialize(a_World);
+		Boat->Initialize(*a_World);
 
 		return true;
 	}
diff --git a/src/Items/ItemBow.h b/src/Items/ItemBow.h
index 8c0b3a0a3..e0ab339d3 100644
--- a/src/Items/ItemBow.h
+++ b/src/Items/ItemBow.h
@@ -66,7 +66,7 @@ public:
 		{
 			return;
 		}
-		if (!Arrow->Initialize(a_Player->GetWorld()))
+		if (!Arrow->Initialize(*a_Player->GetWorld()))
 		{
 			delete Arrow;
 			return;
diff --git a/src/Items/ItemFishingRod.h b/src/Items/ItemFishingRod.h
index 32c151db5..3b1ad1717 100644
--- a/src/Items/ItemFishingRod.h
+++ b/src/Items/ItemFishingRod.h
@@ -231,7 +231,7 @@ public:
 		else
 		{
 			cFloater * Floater = new cFloater(a_Player->GetPosX(), a_Player->GetStance(), a_Player->GetPosZ(), a_Player->GetLookVector() * 15, a_Player->GetUniqueID(), 100 + a_World->GetTickRandomNumber(800) - (a_Player->GetEquippedItem().m_Enchantments.GetLevel(cEnchantments::enchLure) * 100));
-			Floater->Initialize(a_World);
+			Floater->Initialize(*a_World);
 			a_Player->SetIsFishing(true, Floater->GetUniqueID());
 		}
 		return true;
diff --git a/src/Items/ItemItemFrame.h b/src/Items/ItemItemFrame.h
index 27e7dba35..097f04d0b 100644
--- a/src/Items/ItemItemFrame.h
+++ b/src/Items/ItemItemFrame.h
@@ -34,7 +34,7 @@ public:
 		if (Block == E_BLOCK_AIR)
 		{
 			cItemFrame * ItemFrame = new cItemFrame(a_Dir, a_BlockX, a_BlockY, a_BlockZ);
-			if (!ItemFrame->Initialize(a_World))
+			if (!ItemFrame->Initialize(*a_World))
 			{
 				delete ItemFrame;
 				return false;
diff --git a/src/Items/ItemMinecart.h b/src/Items/ItemMinecart.h
index 4e7d8fcff..63038de51 100644
--- a/src/Items/ItemMinecart.h
+++ b/src/Items/ItemMinecart.h
@@ -70,7 +70,7 @@ public:
 				return false;
 			}
 		}  // switch (m_ItemType)
-		Minecart->Initialize(a_World);
+		Minecart->Initialize(*a_World);
 
 		if (!a_Player->IsGameModeCreative())
 		{
diff --git a/src/Items/ItemPainting.h b/src/Items/ItemPainting.h
index b85098221..e4bb76ebe 100644
--- a/src/Items/ItemPainting.h
+++ b/src/Items/ItemPainting.h
@@ -79,7 +79,7 @@ public:
 			};
 
 			cPainting * Painting = new cPainting(gPaintingTitlesList[a_World->GetTickRandomNumber(ARRAYCOUNT(gPaintingTitlesList) - 1)].Title, Dir, a_BlockX, a_BlockY, a_BlockZ);
-			Painting->Initialize(a_World);
+			Painting->Initialize(*a_World);
 
 			if (!a_Player->IsGameModeCreative())
 			{
diff --git a/src/Mobs/Bat.cpp b/src/Mobs/Bat.cpp
index 1417ddd9e..c072d4f48 100644
--- a/src/Mobs/Bat.cpp
+++ b/src/Mobs/Bat.cpp
@@ -7,8 +7,7 @@
 
 
 cBat::cBat(void) :
-		// TODO: The size is only a guesstimate, measure in vanilla and fix the size values here
-	super("Bat", mtBat,  "mob.bat.hurt", "mob.bat.death", 0.7, 0.7)
+	super("Bat", mtBat,  "mob.bat.hurt", "mob.bat.death", 0.5, 0.9)
 {
 }
 
diff --git a/src/Mobs/Blaze.cpp b/src/Mobs/Blaze.cpp
index 326b42f07..19bdf8737 100644
--- a/src/Mobs/Blaze.cpp
+++ b/src/Mobs/Blaze.cpp
@@ -9,8 +9,7 @@
 
 
 cBlaze::cBlaze(void) :
-	// TODO: The size is only a guesstimate, measure in vanilla and fix the size values here
-	super("Blaze", mtBlaze, "mob.blaze.hit", "mob.blaze.death", 0.7, 1.8)
+	super("Blaze", mtBlaze, "mob.blaze.hit", "mob.blaze.death", 0.6, 1.8)
 {
 }
 
@@ -45,7 +44,7 @@ void cBlaze::Attack(float a_Dt)
 		{
 			return;
 		}
-		if (!FireCharge->Initialize(m_World))
+		if (!FireCharge->Initialize(*m_World))
 		{
 			delete FireCharge;
 			return;
diff --git a/src/Mobs/CaveSpider.cpp b/src/Mobs/CaveSpider.cpp
index 56ecd2d28..1157b81f9 100644
--- a/src/Mobs/CaveSpider.cpp
+++ b/src/Mobs/CaveSpider.cpp
@@ -20,7 +20,6 @@ void cCaveSpider::Tick(float a_Dt, cChunk & a_Chunk)
 {
 	super::Tick(a_Dt, a_Chunk);
 
-	// TODO: Check vanilla if cavespiders really get passive during the day / in daylight
 	m_EMPersonality = (GetWorld()->GetTimeOfDay() < (12000 + 1000)) ? PASSIVE : AGGRESSIVE;
 }
 
diff --git a/src/Mobs/Ghast.cpp b/src/Mobs/Ghast.cpp
index d8a7663f8..4df8e165c 100644
--- a/src/Mobs/Ghast.cpp
+++ b/src/Mobs/Ghast.cpp
@@ -46,7 +46,7 @@ void cGhast::Attack(float a_Dt)
 		{
 			return;
 		}
-		if (!GhastBall->Initialize(m_World))
+		if (!GhastBall->Initialize(*m_World))
 		{
 			delete GhastBall;
 			return;
diff --git a/src/Mobs/Skeleton.cpp b/src/Mobs/Skeleton.cpp
index 1e62d7987..e7f3971cc 100644
--- a/src/Mobs/Skeleton.cpp
+++ b/src/Mobs/Skeleton.cpp
@@ -81,7 +81,7 @@ void cSkeleton::Attack(float a_Dt)
 		{
 			return;
 		}
-		if (!Arrow->Initialize(m_World))
+		if (!Arrow->Initialize(*m_World))
 		{
 			delete Arrow;
 			return;
diff --git a/src/Mobs/Wither.cpp b/src/Mobs/Wither.cpp
index 170f4fdc0..da4cc7765 100644
--- a/src/Mobs/Wither.cpp
+++ b/src/Mobs/Wither.cpp
@@ -30,7 +30,7 @@ bool cWither::IsArmored(void) const
 
 
 
-bool cWither::Initialize(cWorld * a_World)
+bool cWither::Initialize(cWorld & a_World)
 {
 	// Set health before BroadcastSpawnEntity()
 	SetHealth(GetMaxHealth() / 3);
diff --git a/src/Mobs/Wither.h b/src/Mobs/Wither.h
index 93b4f8bfc..03a320788 100644
--- a/src/Mobs/Wither.h
+++ b/src/Mobs/Wither.h
@@ -25,7 +25,7 @@ public:
 	bool IsArmored(void) const;
 	
 	// cEntity overrides
-	virtual bool Initialize(cWorld * a_World) override;
+	virtual bool Initialize(cWorld & a_World) override;
 	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL) override;
 	virtual bool DoTakeDamage(TakeDamageInfo & a_TDI) override;
 	virtual void Tick(float a_Dt, cChunk & a_Chunk) override;
diff --git a/src/Noise.cpp b/src/Noise.cpp
index 89115d992..040421106 100644
--- a/src/Noise.cpp
+++ b/src/Noise.cpp
@@ -854,7 +854,7 @@ void cPerlinNoise::Generate2D(
 	NOISE_DATATYPE Amplitude = FirstOctave.m_Amplitude;
 	for (int i = 0; i < ArrayCount; i++)
 	{
-		a_Array[i] *= Amplitude;
+		a_Array[i] = a_Workspace[i] * Amplitude;
 	}
 	
 	// Add each octave:
@@ -949,3 +949,171 @@ void cPerlinNoise::Generate3D(
 
 
 
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cRidgedMultiNoise:
+
+cRidgedMultiNoise::cRidgedMultiNoise(void) :
+	m_Seed(0)
+{
+}
+
+
+
+
+
+cRidgedMultiNoise::cRidgedMultiNoise(int a_Seed) :
+	m_Seed(a_Seed)
+{
+}
+
+
+
+
+
+void cRidgedMultiNoise::SetSeed(int a_Seed)
+{
+	m_Seed = a_Seed;
+}
+
+
+
+
+
+void cRidgedMultiNoise::AddOctave(float a_Frequency, float a_Amplitude)
+{
+	m_Octaves.push_back(cOctave(m_Seed * ((int)m_Octaves.size() + 4) * 4 + 1024, a_Frequency, a_Amplitude));
+}
+
+
+
+
+
+void cRidgedMultiNoise::Generate2D(
+	NOISE_DATATYPE * a_Array,                        ///< Array to generate into [x + a_SizeX * y]
+	int a_SizeX, int a_SizeY,                        ///< Count of the array, in each direction
+	NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array in the X direction
+	NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY,  ///< Noise-space coords of the array in the Y direction
+	NOISE_DATATYPE * a_Workspace                     ///< Workspace that this function can use and trash
+) const
+{
+	if (m_Octaves.empty())
+	{
+		// No work to be done
+		ASSERT(!"RidgedMulti: No octaves to generate!");
+		return;
+	}
+	
+	bool ShouldFreeWorkspace = (a_Workspace == NULL);
+	int ArrayCount = a_SizeX * a_SizeY;
+	if (ShouldFreeWorkspace)
+	{
+		a_Workspace = new NOISE_DATATYPE[ArrayCount];
+	}
+	
+	// Generate the first octave directly into array:
+	const cOctave & FirstOctave = m_Octaves.front();
+	
+	FirstOctave.m_Noise.Generate2D(
+		a_Workspace, a_SizeX, a_SizeY,
+		a_StartX * FirstOctave.m_Frequency, a_EndX * FirstOctave.m_Frequency,
+		a_StartY * FirstOctave.m_Frequency, a_EndY * FirstOctave.m_Frequency
+	);
+	NOISE_DATATYPE Amplitude = FirstOctave.m_Amplitude;
+	for (int i = 0; i < ArrayCount; i++)
+	{
+		a_Array[i] = fabs(a_Workspace[i] * Amplitude);
+	}
+	
+	// Add each octave:
+	for (cOctaves::const_iterator itr = m_Octaves.begin() + 1, end = m_Octaves.end(); itr != end; ++itr)
+	{
+		// Generate cubic noise for the octave:
+		itr->m_Noise.Generate2D(
+			a_Workspace, a_SizeX, a_SizeY,
+			a_StartX * itr->m_Frequency, a_EndX * itr->m_Frequency,
+			a_StartY * itr->m_Frequency, a_EndY * itr->m_Frequency
+		);
+		// Add the cubic noise into the output:
+		NOISE_DATATYPE Amplitude = itr->m_Amplitude;
+		for (int i = 0; i < ArrayCount; i++)
+		{
+			a_Array[i] += fabs(a_Workspace[i] * Amplitude);
+		}
+	}
+	
+	if (ShouldFreeWorkspace)
+	{
+		delete[] a_Workspace;
+	}
+}
+
+
+
+
+
+void cRidgedMultiNoise::Generate3D(
+	NOISE_DATATYPE * a_Array,                        ///< Array to generate into [x + a_SizeX * y + a_SizeX * a_SizeY * z]
+	int a_SizeX, int a_SizeY, int a_SizeZ,           ///< Count of the array, in each direction
+	NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array in the X direction
+	NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY,  ///< Noise-space coords of the array in the Y direction
+	NOISE_DATATYPE a_StartZ, NOISE_DATATYPE a_EndZ,  ///< Noise-space coords of the array in the Z direction
+	NOISE_DATATYPE * a_Workspace                     ///< Workspace that this function can use and trash
+) const
+{
+	if (m_Octaves.empty())
+	{
+		// No work to be done
+		ASSERT(!"RidgedMulti: No octaves to generate!");
+		return;
+	}
+	
+	bool ShouldFreeWorkspace = (a_Workspace == NULL);
+	int ArrayCount = a_SizeX * a_SizeY * a_SizeZ;
+	if (ShouldFreeWorkspace)
+	{
+		a_Workspace = new NOISE_DATATYPE[ArrayCount];
+	}
+	
+	// Generate the first octave directly into array:
+	const cOctave & FirstOctave = m_Octaves.front();
+
+	FirstOctave.m_Noise.Generate3D(
+		a_Workspace, a_SizeX, a_SizeY, a_SizeZ,
+		a_StartX * FirstOctave.m_Frequency, a_EndX * FirstOctave.m_Frequency,
+		a_StartY * FirstOctave.m_Frequency, a_EndY * FirstOctave.m_Frequency,
+		a_StartZ * FirstOctave.m_Frequency, a_EndZ * FirstOctave.m_Frequency
+	);
+	NOISE_DATATYPE Amplitude = FirstOctave.m_Amplitude;
+	for (int i = 0; i < ArrayCount; i++)
+	{
+		a_Array[i] = a_Workspace[i] * Amplitude;
+	}
+	
+	// Add each octave:
+	for (cOctaves::const_iterator itr = m_Octaves.begin() + 1, end = m_Octaves.end(); itr != end; ++itr)
+	{
+		// Generate cubic noise for the octave:
+		itr->m_Noise.Generate3D(
+			a_Workspace, a_SizeX, a_SizeY, a_SizeZ,
+			a_StartX * itr->m_Frequency, a_EndX * itr->m_Frequency,
+			a_StartY * itr->m_Frequency, a_EndY * itr->m_Frequency,
+			a_StartZ * itr->m_Frequency, a_EndZ * itr->m_Frequency
+		);
+		// Add the cubic noise into the output:
+		NOISE_DATATYPE Amplitude = itr->m_Amplitude;
+		for (int i = 0; i < ArrayCount; i++)
+		{
+			a_Array[i] += a_Workspace[i] * Amplitude;
+		}
+	}
+	
+	if (ShouldFreeWorkspace)
+	{
+		delete[] a_Workspace;
+	}
+}
+
+
+
+
diff --git a/src/Noise.h b/src/Noise.h
index e605051b5..83af0cf08 100644
--- a/src/Noise.h
+++ b/src/Noise.h
@@ -192,6 +192,70 @@ protected:
 
 
 
+class cRidgedMultiNoise
+{
+public:
+	cRidgedMultiNoise(void);
+	cRidgedMultiNoise(int a_Seed);
+	
+	
+	void SetSeed(int a_Seed);
+	
+	void AddOctave(NOISE_DATATYPE a_Frequency, NOISE_DATATYPE a_Amplitude);
+	
+	void Generate1D(
+		NOISE_DATATYPE * a_Array,                        ///< Array to generate into
+		int a_SizeX,                                     ///< Count of the array
+		NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array
+		NOISE_DATATYPE * a_Workspace = NULL              ///< Workspace that this function can use and trash
+	) const;
+	
+	
+	void Generate2D(
+		NOISE_DATATYPE * a_Array,                        ///< Array to generate into [x + a_SizeX * y]
+		int a_SizeX, int a_SizeY,                        ///< Count of the array, in each direction
+		NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array in the X direction
+		NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY,  ///< Noise-space coords of the array in the Y direction
+		NOISE_DATATYPE * a_Workspace = NULL              ///< Workspace that this function can use and trash
+	) const;
+	
+	
+	void Generate3D(
+		NOISE_DATATYPE * a_Array,                        ///< Array to generate into [x + a_SizeX * y + a_SizeX * a_SizeY * z]
+		int a_SizeX, int a_SizeY, int a_SizeZ,           ///< Count of the array, in each direction
+		NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array in the X direction
+		NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY,  ///< Noise-space coords of the array in the Y direction
+		NOISE_DATATYPE a_StartZ, NOISE_DATATYPE a_EndZ,  ///< Noise-space coords of the array in the Z direction
+		NOISE_DATATYPE * a_Workspace = NULL              ///< Workspace that this function can use and trash
+	) const;
+	
+protected:
+	class cOctave
+	{
+	public:
+		cCubicNoise m_Noise;
+		
+		NOISE_DATATYPE m_Frequency;  // Coord multiplier
+		NOISE_DATATYPE m_Amplitude;  // Value multiplier
+		
+		cOctave(int a_Seed, NOISE_DATATYPE a_Frequency, NOISE_DATATYPE a_Amplitude) :
+			m_Noise(a_Seed),
+			m_Frequency(a_Frequency),
+			m_Amplitude(a_Amplitude)
+		{
+		}
+	} ;
+	
+	typedef std::vector<cOctave> cOctaves;
+	
+	int      m_Seed;
+	cOctaves m_Octaves;
+} ;
+
+
+
+
+
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 // Inline function definitions:
 // These need to be in the header, otherwise linker error occur in MSVC
diff --git a/src/OSSupport/IsThread.cpp b/src/OSSupport/IsThread.cpp
index 04fc818e4..67f336c97 100644
--- a/src/OSSupport/IsThread.cpp
+++ b/src/OSSupport/IsThread.cpp
@@ -60,6 +60,9 @@ static void SetThreadName(DWORD dwThreadID, const char * threadName)
 cIsThread::cIsThread(const AString & iThreadName) :
 	m_ShouldTerminate(false),
 	m_ThreadName(iThreadName),
+	#ifdef _WIN32
+		m_ThreadID(0),
+	#endif
 	m_Handle(NULL_HANDLE)
 {
 }
@@ -83,8 +86,8 @@ bool cIsThread::Start(void)
 	ASSERT(m_Handle == NULL_HANDLE);  // Has already started one thread?
 	#ifdef _WIN32
 		// Create the thread suspended, so that the mHandle variable is valid in the thread procedure
-		DWORD ThreadID = 0;
-		m_Handle = CreateThread(NULL, 0, thrExecute, this, CREATE_SUSPENDED, &ThreadID);
+		m_ThreadID = 0;
+		m_Handle = CreateThread(NULL, 0, thrExecute, this, CREATE_SUSPENDED, &m_ThreadID);
 		if (m_Handle == NULL)
 		{
 			LOGERROR("ERROR: Could not create thread \"%s\", GLE = %d!", m_ThreadName.c_str(), GetLastError());
@@ -96,7 +99,7 @@ bool cIsThread::Start(void)
 			// Thread naming is available only in MSVC
 			if (!m_ThreadName.empty())
 			{
-				SetThreadName(ThreadID, m_ThreadName.c_str());
+				SetThreadName(m_ThreadID, m_ThreadName.c_str());
 			}
 		#endif  // _DEBUG and _MSC_VER
 		
@@ -177,3 +180,15 @@ unsigned long cIsThread::GetCurrentID(void)
 
 
 
+bool cIsThread::IsCurrentThread(void) const
+{
+	#ifdef _WIN32
+		return (GetCurrentThreadId() == m_ThreadID);
+	#else
+		return (m_Handle == pthread_self());
+	#endif
+}
+
+
+
+
diff --git a/src/OSSupport/IsThread.h b/src/OSSupport/IsThread.h
index 57651a490..c20fc3e7e 100644
--- a/src/OSSupport/IsThread.h
+++ b/src/OSSupport/IsThread.h
@@ -48,6 +48,9 @@ public:
 	/// Returns the OS-dependent thread ID for the caller's thread
 	static unsigned long GetCurrentID(void);
 
+	/** Returns true if the thread calling this function is the thread contained within this object. */
+	bool IsCurrentThread(void) const;
+
 protected:
 	AString m_ThreadName;
 	
@@ -60,6 +63,7 @@ protected:
 
 	#ifdef _WIN32
 	
+		DWORD m_ThreadID;
 		HANDLE m_Handle;
 		
 		static DWORD __stdcall thrExecute(LPVOID a_Param)
diff --git a/src/Protocol/Protocol125.cpp b/src/Protocol/Protocol125.cpp
index 873295f62..5796ba271 100644
--- a/src/Protocol/Protocol125.cpp
+++ b/src/Protocol/Protocol125.cpp
@@ -133,7 +133,8 @@ typedef unsigned char Byte;
 
 cProtocol125::cProtocol125(cClientHandle * a_Client) :
 	super(a_Client),
-	m_ReceivedData(32 KiB)
+	m_ReceivedData(32 KiB),
+	m_LastSentDimension(dimNotSet)
 {
 }
 
@@ -591,6 +592,7 @@ void cProtocol125::SendLogin(const cPlayer & a_Player, const cWorld & a_World)
 	WriteByte  (0);  // Unused
 	WriteByte  (60);  // Client list width or something
 	Flush();
+	m_LastSentDimension = a_World.GetDimension();
 }
 
 
@@ -834,6 +836,11 @@ void cProtocol125::SendRemoveEntityEffect(const cEntity & a_Entity, int a_Effect
 void cProtocol125::SendRespawn(const cWorld & a_World)
 {
 	cCSLock Lock(m_CSPacket);
+	if (m_LastSentDimension == a_World.GetDimension())
+	{
+		// Must not send a respawn for the world with the same dimension, the client goes cuckoo if we do
+		return;
+	}
 	cPlayer * Player = m_Client->GetPlayer();
 	WriteByte  (PACKET_RESPAWN);
 	WriteInt   ((int)(a_World.GetDimension()));
@@ -841,6 +848,8 @@ void cProtocol125::SendRespawn(const cWorld & a_World)
 	WriteChar  ((char)Player->GetGameMode());
 	WriteShort (256);  // Current world height
 	WriteString("default");
+	Flush();
+	m_LastSentDimension = a_World.GetDimension();
 }
 
 
diff --git a/src/Protocol/Protocol125.h b/src/Protocol/Protocol125.h
index 3f39c8965..85418f71f 100644
--- a/src/Protocol/Protocol125.h
+++ b/src/Protocol/Protocol125.h
@@ -113,6 +113,10 @@ protected:
 	cByteBuffer m_ReceivedData;  ///< Buffer for the received data
 	
 	AString m_Username;  ///< Stored in ParseHandshake(), compared to Login username
+
+	/** The dimension that was last sent to a player in a Respawn or Login packet.
+	Used to avoid Respawning into the same dimension, which confuses the client. */
+	eDimension m_LastSentDimension;
 	
 	virtual void SendData(const char * a_Data, size_t a_Size) override;
 	
diff --git a/src/Protocol/Protocol132.cpp b/src/Protocol/Protocol132.cpp
index f4717f592..1e3fc8de8 100644
--- a/src/Protocol/Protocol132.cpp
+++ b/src/Protocol/Protocol132.cpp
@@ -253,7 +253,7 @@ void cProtocol132::SendLogin(const cPlayer & a_Player, const cWorld & a_World)
 	WriteByte  (0);  // Unused, used to be world height
 	WriteByte  (8);  // Client list width or something
 	Flush();
-	
+	m_LastSentDimension = a_World.GetDimension();
 	SendCompass(a_World);
 }
 
diff --git a/src/Protocol/Protocol17x.cpp b/src/Protocol/Protocol17x.cpp
index 9c5f5eaba..f5b176e54 100644
--- a/src/Protocol/Protocol17x.cpp
+++ b/src/Protocol/Protocol17x.cpp
@@ -92,7 +92,8 @@ cProtocol172::cProtocol172(cClientHandle * a_Client, const AString & a_ServerAdd
 	m_ReceivedData(32 KiB),
 	m_OutPacketBuffer(64 KiB),
 	m_OutPacketLenBuffer(20),  // 20 bytes is more than enough for one VarInt
-	m_IsEncrypted(false)
+	m_IsEncrypted(false),
+	m_LastSentDimension(dimNotSet)
 {
 	// Create the comm log file, if so requested:
 	if (g_ShouldLogCommIn || g_ShouldLogCommOut)
@@ -656,6 +657,7 @@ void cProtocol172::SendLogin(const cPlayer & a_Player, const cWorld & a_World)
 		Pkt.WriteByte(std::min(Server->GetMaxPlayers(), 60));
 		Pkt.WriteString("default");  // Level type - wtf?
 	}
+	m_LastSentDimension = a_World.GetDimension();
 	
 	// Send the spawn position:
 	{
@@ -986,12 +988,19 @@ void cProtocol172::SendRemoveEntityEffect(const cEntity & a_Entity, int a_Effect
 
 void cProtocol172::SendRespawn(const cWorld & a_World)
 {
+	if (m_LastSentDimension == a_World.GetDimension())
+	{
+		// Must not send a respawn for the world with the same dimension, the client goes cuckoo if we do
+		return;
+	}
+
 	cPacketizer Pkt(*this, 0x07);  // Respawn packet
 	cPlayer * Player = m_Client->GetPlayer();
 	Pkt.WriteInt((int)a_World.GetDimension());
 	Pkt.WriteByte(2);  // TODO: Difficulty (set to Normal)
 	Pkt.WriteByte((Byte)Player->GetEffectiveGameMode());
 	Pkt.WriteString("default");
+	m_LastSentDimension = a_World.GetDimension();
 }
 
 
diff --git a/src/Protocol/Protocol17x.h b/src/Protocol/Protocol17x.h
index cafdb50e4..8be1d9211 100644
--- a/src/Protocol/Protocol17x.h
+++ b/src/Protocol/Protocol17x.h
@@ -244,6 +244,10 @@ protected:
 	/** The logfile where the comm is logged, when g_ShouldLogComm is true */
 	cFile m_CommLogFile;
 	
+	/** The dimension that was last sent to a player in a Respawn or Login packet.
+	Used to avoid Respawning into the same dimension, which confuses the client. */
+	eDimension m_LastSentDimension;
+	
 	
 	/** Adds the received (unencrypted) data to m_ReceivedData, parses complete packets */
 	void AddReceivedData(const char * a_Data, size_t a_Size);
diff --git a/src/Server.cpp b/src/Server.cpp
index aa731cdd2..66bccd680 100644
--- a/src/Server.cpp
+++ b/src/Server.cpp
@@ -107,10 +107,16 @@ void cServer::cTickThread::Execute(void)
 cServer::cServer(void) :
 	m_ListenThreadIPv4(*this, cSocket::IPv4, "Client IPv4"),
 	m_ListenThreadIPv6(*this, cSocket::IPv6, "Client IPv6"),
+	m_PlayerCount(0),
+	m_PlayerCountDiff(0),
+	m_ClientViewDistance(0),
 	m_bIsConnected(false),
 	m_bRestarting(false),
 	m_RCONServer(*this),
-	m_TickThread(*this)
+	m_MaxPlayers(0),
+	m_bIsHardcore(false),
+	m_TickThread(*this),
+	m_ShouldAuthenticate(false)
 {
 }
 
diff --git a/src/Simulator/IncrementalRedstoneSimulator.cpp b/src/Simulator/IncrementalRedstoneSimulator.cpp
index 51a7c2886..b32a57165 100644
--- a/src/Simulator/IncrementalRedstoneSimulator.cpp
+++ b/src/Simulator/IncrementalRedstoneSimulator.cpp
@@ -17,8 +17,14 @@
 
 	
 
-cIncrementalRedstoneSimulator::cIncrementalRedstoneSimulator(cWorld & a_World)
-	: super(a_World)
+cIncrementalRedstoneSimulator::cIncrementalRedstoneSimulator(cWorld & a_World) :
+	super(a_World),
+	m_RedstoneSimulatorChunkData(),
+	m_PoweredBlocks(),
+	m_LinkedPoweredBlocks(),
+	m_SimulatedPlayerToggleableBlocks(),
+	m_RepeatersDelayList(),
+	m_Chunk()
 {
 }
 
@@ -83,6 +89,7 @@ void cIncrementalRedstoneSimulator::RedstoneAddBlock(int a_BlockX, int a_BlockY,
 		{
 			LOGD("cIncrementalRedstoneSimulator: Erased block @ {%i, %i, %i} from powered blocks list as it no longer connected to a source", itr->a_BlockPos.x, itr->a_BlockPos.y, itr->a_BlockPos.z);
 			itr = PoweredBlocks->erase(itr);
+			a_Chunk->SetIsRedstoneDirty(true);
 			continue;
 		}
 		else if (
@@ -97,6 +104,7 @@ void cIncrementalRedstoneSimulator::RedstoneAddBlock(int a_BlockX, int a_BlockY,
 		{
 			LOGD("cIncrementalRedstoneSimulator: Erased block @ {%i, %i, %i} from powered blocks list due to present/past metadata mismatch", itr->a_BlockPos.x, itr->a_BlockPos.y, itr->a_BlockPos.z);
 			itr = PoweredBlocks->erase(itr);
+			a_Chunk->SetIsRedstoneDirty(true);
 			continue;
 		}
 		++itr;
@@ -112,6 +120,7 @@ void cIncrementalRedstoneSimulator::RedstoneAddBlock(int a_BlockX, int a_BlockY,
 			{
 				LOGD("cIncrementalRedstoneSimulator: Erased block @ {%i, %i, %i} from linked powered blocks list as it is no longer connected to a source", itr->a_BlockPos.x, itr->a_BlockPos.y, itr->a_BlockPos.z);
 				itr = LinkedPoweredBlocks->erase(itr);
+				a_Chunk->SetIsRedstoneDirty(true);
 				continue;
 			}
 			else if (
@@ -125,6 +134,7 @@ void cIncrementalRedstoneSimulator::RedstoneAddBlock(int a_BlockX, int a_BlockY,
 			{
 				LOGD("cIncrementalRedstoneSimulator: Erased block @ {%i, %i, %i} from linked powered blocks list due to present/past metadata mismatch", itr->a_BlockPos.x, itr->a_BlockPos.y, itr->a_BlockPos.z);
 				itr = LinkedPoweredBlocks->erase(itr);
+				a_Chunk->SetIsRedstoneDirty(true);
 				continue;
 			}
 		}
@@ -134,6 +144,7 @@ void cIncrementalRedstoneSimulator::RedstoneAddBlock(int a_BlockX, int a_BlockY,
 			{
 				LOGD("cIncrementalRedstoneSimulator: Erased block @ {%i, %i, %i} from linked powered blocks list as it is no longer powered through a valid middle block", itr->a_BlockPos.x, itr->a_BlockPos.y, itr->a_BlockPos.z);
 				itr = LinkedPoweredBlocks->erase(itr);
+				a_Chunk->SetIsRedstoneDirty(true);
 				continue;
 			}
 		}
@@ -198,8 +209,16 @@ void cIncrementalRedstoneSimulator::RedstoneAddBlock(int a_BlockX, int a_BlockY,
 	{
 		return;
 	}
-
-	RedstoneSimulatorChunkData->push_back(cCoordWithBlockAndBool(RelX, a_BlockY, RelZ, Block, false));
+	
+	for (cRedstoneSimulatorChunkData::iterator itr = a_Chunk->GetRedstoneSimulatorQueuedData()->begin(); itr != a_Chunk->GetRedstoneSimulatorQueuedData()->end(); ++itr)
+	{
+		if ((itr->x == RelX) && (itr->y == a_BlockY) && (itr->z == RelZ))
+		{
+			// Can't have duplicates in here either, in case something adds the block again before the structure can written to the main chunk data
+			return;
+		}
+	}
+	a_Chunk->GetRedstoneSimulatorQueuedData()->push_back(cCoordWithBlockAndBool(RelX, a_BlockY, RelZ, Block, false));
 }
 
 
@@ -208,22 +227,29 @@ void cIncrementalRedstoneSimulator::RedstoneAddBlock(int a_BlockX, int a_BlockY,
 
 void cIncrementalRedstoneSimulator::SimulateChunk(float a_Dt, int a_ChunkX, int a_ChunkZ, cChunk * a_Chunk)
 {
-	// We still attempt to simulate all blocks in the chunk every tick, because of outside influence that needs to be taken into account
-	// For example, repeaters need to be ticked, pressure plates checked for entities, daylight sensor checked for light changes, etc.
-	// The easiest way to make this more efficient is probably just to reduce code within the handlers that put too much strain on server, like getting or setting blocks
-	// A marking dirty system might be a TODO for later on, perhaps
-
 	m_RedstoneSimulatorChunkData = a_Chunk->GetRedstoneSimulatorData();
-	if (m_RedstoneSimulatorChunkData->empty())
+	if (m_RedstoneSimulatorChunkData->empty() && a_Chunk->GetRedstoneSimulatorQueuedData()->empty())
 	{
 		return;
 	}
 
+	m_RedstoneSimulatorChunkData->insert(m_RedstoneSimulatorChunkData->end(), a_Chunk->GetRedstoneSimulatorQueuedData()->begin(), a_Chunk->GetRedstoneSimulatorQueuedData()->end());
+	a_Chunk->GetRedstoneSimulatorQueuedData()->clear();
+
 	m_PoweredBlocks = a_Chunk->GetRedstoneSimulatorPoweredBlocksList();
 	m_RepeatersDelayList = a_Chunk->GetRedstoneSimulatorRepeatersDelayList();
 	m_SimulatedPlayerToggleableBlocks = a_Chunk->GetRedstoneSimulatorSimulatedPlayerToggleableList();
 	m_LinkedPoweredBlocks = a_Chunk->GetRedstoneSimulatorLinkedBlocksList();
 	m_Chunk = a_Chunk;
+	bool ShouldUpdateSimulateOnceBlocks = false;
+
+	if (a_Chunk->IsRedstoneDirty())
+	{
+		// Simulate the majority of devices only if something (blockwise or power-wise) has changed
+		// Make sure to allow the chunk to resimulate after the initial run if there was a power change (ShouldUpdateSimulateOnceBlocks helps to do this)
+		a_Chunk->SetIsRedstoneDirty(false);
+		ShouldUpdateSimulateOnceBlocks = true;
+	}
 
 	for (cRedstoneSimulatorChunkData::iterator dataitr = m_RedstoneSimulatorChunkData->begin(); dataitr != m_RedstoneSimulatorChunkData->end();)
 	{
@@ -235,63 +261,25 @@ void cIncrementalRedstoneSimulator::SimulateChunk(float a_Dt, int a_ChunkX, int
 
 		switch (dataitr->Data)
 		{
-			case E_BLOCK_BLOCK_OF_REDSTONE:     HandleRedstoneBlock(dataitr->x, dataitr->y, dataitr->z);	break;
-			case E_BLOCK_LEVER:                 HandleRedstoneLever(dataitr->x, dataitr->y, dataitr->z);	break;
-			case E_BLOCK_FENCE_GATE:            HandleFenceGate(dataitr->x, dataitr->y, dataitr->z);      break;
-			case E_BLOCK_TNT:                   HandleTNT(dataitr->x, dataitr->y, dataitr->z);            break;
-			case E_BLOCK_TRAPDOOR:              HandleTrapdoor(dataitr->x, dataitr->y, dataitr->z);       break;
-			case E_BLOCK_REDSTONE_WIRE:         HandleRedstoneWire(dataitr->x, dataitr->y, dataitr->z);	break;
-			case E_BLOCK_NOTE_BLOCK:            HandleNoteBlock(dataitr->x, dataitr->y, dataitr->z);      break;
-			case E_BLOCK_DAYLIGHT_SENSOR:       HandleDaylightSensor(dataitr->x, dataitr->y, dataitr->z); break;
-			case E_BLOCK_COMMAND_BLOCK:         HandleCommandBlock(dataitr->x, dataitr->y, dataitr->z);   break;
+			case E_BLOCK_DAYLIGHT_SENSOR: HandleDaylightSensor(dataitr->x, dataitr->y, dataitr->z); break;
 
-			case E_BLOCK_REDSTONE_TORCH_OFF:
-			case E_BLOCK_REDSTONE_TORCH_ON:
-			{
-				HandleRedstoneTorch(dataitr->x, dataitr->y, dataitr->z, dataitr->Data);
-				break;
-			}
-			case E_BLOCK_STONE_BUTTON:
-			case E_BLOCK_WOODEN_BUTTON:
-			{
-				HandleRedstoneButton(dataitr->x, dataitr->y, dataitr->z);
-				break;
-			}
 			case E_BLOCK_REDSTONE_REPEATER_OFF:
 			case E_BLOCK_REDSTONE_REPEATER_ON:
 			{
-				HandleRedstoneRepeater(dataitr->x, dataitr->y, dataitr->z, dataitr->Data);
-				break;
-			}
-			case E_BLOCK_PISTON:
-			case E_BLOCK_STICKY_PISTON:
-			{
-				HandlePiston(dataitr->x, dataitr->y, dataitr->z);
-				break;
-			}
-			case E_BLOCK_REDSTONE_LAMP_OFF:
-			case E_BLOCK_REDSTONE_LAMP_ON:
-			{
-				HandleRedstoneLamp(dataitr->x, dataitr->y, dataitr->z, dataitr->Data);
-				break;
-			}
-			case E_BLOCK_DISPENSER:
-			case E_BLOCK_DROPPER:
-			{
-				HandleDropSpenser(dataitr->x, dataitr->y, dataitr->z);
-				break;
-			}
-			case E_BLOCK_WOODEN_DOOR:
-			case E_BLOCK_IRON_DOOR:
-			{
-				HandleDoor(dataitr->x, dataitr->y, dataitr->z);
-				break;
-			}
-			case E_BLOCK_ACTIVATOR_RAIL:
-			case E_BLOCK_DETECTOR_RAIL:
-			case E_BLOCK_POWERED_RAIL:
-			{
-				HandleRail(dataitr->x, dataitr->y, dataitr->z, dataitr->Data);
+				bool FoundItem = false;
+				for (RepeatersDelayList::iterator repeateritr = m_RepeatersDelayList->begin(); repeateritr != m_RepeatersDelayList->end(); ++repeateritr)
+				{
+					if (repeateritr->a_RelBlockPos == Vector3i(dataitr->x, dataitr->y, dataitr->z))
+					{
+						HandleRedstoneRepeater(dataitr->x, dataitr->y, dataitr->z, dataitr->Data, repeateritr);
+						FoundItem = true;
+						break;
+					}
+				}
+				if (!FoundItem && ShouldUpdateSimulateOnceBlocks)
+				{
+					HandleRedstoneRepeater(dataitr->x, dataitr->y, dataitr->z, dataitr->Data, m_RepeatersDelayList->end());
+				}
 				break;
 			}
 			case E_BLOCK_WOODEN_PRESSURE_PLATE:
@@ -302,7 +290,67 @@ void cIncrementalRedstoneSimulator::SimulateChunk(float a_Dt, int a_ChunkX, int
 				HandlePressurePlate(dataitr->x, dataitr->y, dataitr->z, dataitr->Data);
 				break;
 			}
-			default: LOGD("Unhandled block (!) or unimplemented redstone block: %s", ItemToString(dataitr->Data).c_str()); break;
+			default: break;
+		}
+
+		if (ShouldUpdateSimulateOnceBlocks)
+		{
+			switch (dataitr->Data)
+			{				
+				case E_BLOCK_REDSTONE_WIRE:         HandleRedstoneWire(dataitr->x, dataitr->y, dataitr->z);	  break;
+				case E_BLOCK_COMMAND_BLOCK:         HandleCommandBlock(dataitr->x, dataitr->y, dataitr->z);   break;
+				case E_BLOCK_NOTE_BLOCK:            HandleNoteBlock(dataitr->x, dataitr->y, dataitr->z);      break;
+				case E_BLOCK_BLOCK_OF_REDSTONE:     HandleRedstoneBlock(dataitr->x, dataitr->y, dataitr->z);  break;
+				case E_BLOCK_LEVER:                 HandleRedstoneLever(dataitr->x, dataitr->y, dataitr->z);  break;
+				case E_BLOCK_FENCE_GATE:            HandleFenceGate(dataitr->x, dataitr->y, dataitr->z);      break;
+				case E_BLOCK_TNT:                   HandleTNT(dataitr->x, dataitr->y, dataitr->z);            break;
+				case E_BLOCK_TRAPDOOR:              HandleTrapdoor(dataitr->x, dataitr->y, dataitr->z);       break;
+
+				case E_BLOCK_ACTIVATOR_RAIL:
+				case E_BLOCK_DETECTOR_RAIL:
+				case E_BLOCK_POWERED_RAIL:
+				{
+					HandleRail(dataitr->x, dataitr->y, dataitr->z, dataitr->Data);
+					break;
+				}
+				case E_BLOCK_WOODEN_DOOR:
+				case E_BLOCK_IRON_DOOR:
+				{
+					HandleDoor(dataitr->x, dataitr->y, dataitr->z);
+					break;
+				}
+				case E_BLOCK_REDSTONE_LAMP_OFF:
+				case E_BLOCK_REDSTONE_LAMP_ON:
+				{
+					HandleRedstoneLamp(dataitr->x, dataitr->y, dataitr->z, dataitr->Data);
+					break;
+				}
+				case E_BLOCK_DISPENSER:
+				case E_BLOCK_DROPPER:
+				{
+					HandleDropSpenser(dataitr->x, dataitr->y, dataitr->z);
+					break;
+				}
+				case E_BLOCK_PISTON:
+				case E_BLOCK_STICKY_PISTON:
+				{
+					HandlePiston(dataitr->x, dataitr->y, dataitr->z);
+					break;
+				}
+				case E_BLOCK_REDSTONE_TORCH_OFF:
+				case E_BLOCK_REDSTONE_TORCH_ON:
+				{
+					HandleRedstoneTorch(dataitr->x, dataitr->y, dataitr->z, dataitr->Data);
+					break;
+				}
+				case E_BLOCK_STONE_BUTTON:
+				case E_BLOCK_WOODEN_BUTTON:
+				{
+					HandleRedstoneButton(dataitr->x, dataitr->y, dataitr->z);
+					break;
+				}
+				default: break;
+			}
 		}
 		++dataitr;
 	}
@@ -699,7 +747,7 @@ void cIncrementalRedstoneSimulator::HandleRedstoneWire(int a_RelBlockX, int a_Re
 
 
 
-void cIncrementalRedstoneSimulator::HandleRedstoneRepeater(int a_RelBlockX, int a_RelBlockY, int a_RelBlockZ, BLOCKTYPE a_MyState)
+void cIncrementalRedstoneSimulator::HandleRedstoneRepeater(int a_RelBlockX, int a_RelBlockY, int a_RelBlockZ, BLOCKTYPE a_MyState, RepeatersDelayList::iterator a_Itr)
 {
 	/* Repeater Orientation Mini Guide:
 	===================================
@@ -725,87 +773,99 @@ void cIncrementalRedstoneSimulator::HandleRedstoneRepeater(int a_RelBlockX, int
 	// Create a variable holding my meta to avoid multiple lookups.
 	NIBBLETYPE a_Meta = m_Chunk->GetMeta(a_RelBlockX, a_RelBlockY, a_RelBlockZ);
 	bool IsOn = (a_MyState == E_BLOCK_REDSTONE_REPEATER_ON);
-    	
+    
+	bool WereItrsChanged = false;
 	if (!IsRepeaterLocked(a_RelBlockX, a_RelBlockY, a_RelBlockZ, a_Meta)) // If we're locked, change nothing. Otherwise:
 	{
 		bool IsSelfPowered = IsRepeaterPowered(a_RelBlockX, a_RelBlockY, a_RelBlockZ, a_Meta);
 		if (IsSelfPowered && !IsOn) // Queue a power change if powered, but not on and not locked.
 		{
-			QueueRepeaterPowerChange(a_RelBlockX, a_RelBlockY, a_RelBlockZ, a_Meta, true);
+			WereItrsChanged = QueueRepeaterPowerChange(a_RelBlockX, a_RelBlockY, a_RelBlockZ, a_Meta, true);
 		}
 		else if (!IsSelfPowered && IsOn) // Queue a power change if unpowered, on, and not locked.
 		{
-			QueueRepeaterPowerChange(a_RelBlockX, a_RelBlockY, a_RelBlockZ, a_Meta, false);
+			WereItrsChanged = QueueRepeaterPowerChange(a_RelBlockX, a_RelBlockY, a_RelBlockZ, a_Meta, false);
+		}
+		else
+		{
+			return;
 		}
 	}
+	else
+	{
+		return;
+	}
 
-	for (RepeatersDelayList::iterator itr = m_RepeatersDelayList->begin(); itr != m_RepeatersDelayList->end(); ++itr)
+	if (WereItrsChanged)
 	{
-		if (!itr->a_RelBlockPos.Equals(Vector3i(a_RelBlockX, a_RelBlockY, a_RelBlockZ)))
+		for (a_Itr = m_RepeatersDelayList->begin(); a_Itr != m_RepeatersDelayList->end(); ++a_Itr)
 		{
-			continue;
+			if (a_Itr->a_RelBlockPos == Vector3i(a_RelBlockX, a_RelBlockY, a_RelBlockZ))
+			{
+				break;
+			}
 		}
+	}
 
-		if (itr->a_ElapsedTicks >= itr->a_DelayTicks) // Has the elapsed ticks reached the target ticks?
+	if (a_Itr->a_ElapsedTicks >= a_Itr->a_DelayTicks) // Has the elapsed ticks reached the target ticks?
+	{
+		if (a_Itr->ShouldPowerOn)
 		{
-			if (itr->ShouldPowerOn)
+			if (!IsOn)
 			{
-				if (!IsOn)
+				m_Chunk->SetBlock(a_RelBlockX, a_RelBlockY, a_RelBlockZ, E_BLOCK_REDSTONE_REPEATER_ON, a_Meta); // For performance
+			}
+
+			switch (a_Meta & 0x3) // We only want the direction (bottom) bits
+			{
+				case 0x0:
 				{
-					m_Chunk->SetBlock(a_RelBlockX, a_RelBlockY, a_RelBlockZ, E_BLOCK_REDSTONE_REPEATER_ON, a_Meta); // For performance
+					SetBlockPowered(a_RelBlockX, a_RelBlockY, a_RelBlockZ - 1, a_RelBlockX, a_RelBlockY, a_RelBlockZ);
+					SetDirectionLinkedPowered(a_RelBlockX, a_RelBlockY, a_RelBlockZ, BLOCK_FACE_ZM);
+					break;
 				}
-
-				switch (a_Meta & 0x3) // We only want the direction (bottom) bits
+				case 0x1:
 				{
-					case 0x0:
-					{
-						SetBlockPowered(a_RelBlockX, a_RelBlockY, a_RelBlockZ - 1, a_RelBlockX, a_RelBlockY, a_RelBlockZ);
-						SetDirectionLinkedPowered(a_RelBlockX, a_RelBlockY, a_RelBlockZ, BLOCK_FACE_ZM);
-						break;
-					}
-					case 0x1:
-					{
-						SetBlockPowered(a_RelBlockX + 1, a_RelBlockY, a_RelBlockZ, a_RelBlockX, a_RelBlockY, a_RelBlockZ);
-						SetDirectionLinkedPowered(a_RelBlockX, a_RelBlockY, a_RelBlockZ, BLOCK_FACE_XP);
-						break;
-					}
-					case 0x2:
-					{
-						SetBlockPowered(a_RelBlockX, a_RelBlockY, a_RelBlockZ + 1, a_RelBlockX, a_RelBlockY, a_RelBlockZ);
-						SetDirectionLinkedPowered(a_RelBlockX, a_RelBlockY, a_RelBlockZ, BLOCK_FACE_ZP);
-						break;
-					}
-					case 0x3:
-					{
-						SetBlockPowered(a_RelBlockX - 1, a_RelBlockY, a_RelBlockZ, a_RelBlockX, a_RelBlockY, a_RelBlockZ);
-						SetDirectionLinkedPowered(a_RelBlockX, a_RelBlockY, a_RelBlockZ, BLOCK_FACE_XM);
-						break;
-					}
+					SetBlockPowered(a_RelBlockX + 1, a_RelBlockY, a_RelBlockZ, a_RelBlockX, a_RelBlockY, a_RelBlockZ);
+					SetDirectionLinkedPowered(a_RelBlockX, a_RelBlockY, a_RelBlockZ, BLOCK_FACE_XP);
+					break;
 				}
-
-				// Removal of the data entry will be handled in SimChunk - we still want to continue trying to power blocks, even if our delay time has reached
-				// Otherwise, the power state of blocks in front won't update after we have powered on
-				return;
-			}
-			else
-			{
-				if (IsOn)
+				case 0x2:
 				{
-					m_Chunk->SetBlock(a_RelBlockX, a_RelBlockY, a_RelBlockZ, E_BLOCK_REDSTONE_REPEATER_OFF, a_Meta);
+					SetBlockPowered(a_RelBlockX, a_RelBlockY, a_RelBlockZ + 1, a_RelBlockX, a_RelBlockY, a_RelBlockZ);
+					SetDirectionLinkedPowered(a_RelBlockX, a_RelBlockY, a_RelBlockZ, BLOCK_FACE_ZP);
+					break;
+				}
+				case 0x3:
+				{
+					SetBlockPowered(a_RelBlockX - 1, a_RelBlockY, a_RelBlockZ, a_RelBlockX, a_RelBlockY, a_RelBlockZ);
+					SetDirectionLinkedPowered(a_RelBlockX, a_RelBlockY, a_RelBlockZ, BLOCK_FACE_XM);
+					break;
 				}
-				m_RepeatersDelayList->erase(itr); // We can remove off repeaters which don't need further updating
-				return;
 			}
+
+			// Removal of the data entry will be handled in SimChunk - we still want to continue trying to power blocks, even if our delay time has reached
+			// Otherwise, the power state of blocks in front won't update after we have powered on
+			return;
 		}
 		else
 		{
-			// Apparently, incrementing ticks only works reliably here, and not in SimChunk;
-			// With a world with lots of redstone, the repeaters simply do not delay
-			// I am confounded to say why. Perhaps optimisation failure.
-			LOGD("Incremented a repeater @ {%i %i %i} | Elapsed ticks: %i | Target delay: %i", itr->a_RelBlockPos.x, itr->a_RelBlockPos.y, itr->a_RelBlockPos.z, itr->a_ElapsedTicks, itr->a_DelayTicks);
-			itr->a_ElapsedTicks++;
+			if (IsOn)
+			{
+				m_Chunk->SetBlock(a_RelBlockX, a_RelBlockY, a_RelBlockZ, E_BLOCK_REDSTONE_REPEATER_OFF, a_Meta);
+			}
+			m_RepeatersDelayList->erase(a_Itr); // We can remove off repeaters which don't need further updating
+			return;
 		}
 	}
+	else
+	{
+		// Apparently, incrementing ticks only works reliably here, and not in SimChunk;
+		// With a world with lots of redstone, the repeaters simply do not delay
+		// I am confounded to say why. Perhaps optimisation failure.
+		LOGD("Incremented a repeater @ {%i %i %i} | Elapsed ticks: %i | Target delay: %i", a_Itr->a_RelBlockPos.x, a_Itr->a_RelBlockPos.y, a_Itr->a_RelBlockPos.z, a_Itr->a_ElapsedTicks, a_Itr->a_DelayTicks);
+		a_Itr->a_ElapsedTicks++;
+	}
 }
 
 
@@ -905,8 +965,11 @@ void cIncrementalRedstoneSimulator::HandleDoor(int a_RelBlockX, int a_RelBlockY,
 		if (!AreCoordsSimulated(a_RelBlockX, a_RelBlockY, a_RelBlockZ, true))
 		{
 			cChunkInterface ChunkInterface(m_World.GetChunkMap());
-			cBlockDoorHandler::ChangeDoor(ChunkInterface, a_RelBlockX, a_RelBlockY, a_RelBlockZ);
-			m_Chunk->BroadcastSoundParticleEffect(1003, BlockX, a_RelBlockY, BlockZ, 0);
+			if (!cBlockDoorHandler::IsOpen(ChunkInterface, BlockX, a_RelBlockY, BlockZ))
+			{
+				cBlockDoorHandler::SetOpen(ChunkInterface, BlockX, a_RelBlockY, BlockZ, true);
+				m_Chunk->BroadcastSoundParticleEffect(1003, BlockX, a_RelBlockY, BlockZ, 0);
+			}
 			SetPlayerToggleableBlockAsSimulated(a_RelBlockX, a_RelBlockY, a_RelBlockZ, true);
 		}
 	}
@@ -915,8 +978,11 @@ void cIncrementalRedstoneSimulator::HandleDoor(int a_RelBlockX, int a_RelBlockY,
 		if (!AreCoordsSimulated(a_RelBlockX, a_RelBlockY, a_RelBlockZ, false))
 		{
 			cChunkInterface ChunkInterface(m_World.GetChunkMap());
-			cBlockDoorHandler::ChangeDoor(ChunkInterface, a_RelBlockX, a_RelBlockY, a_RelBlockZ);
-			m_Chunk->BroadcastSoundParticleEffect(1003, BlockX, a_RelBlockY, BlockZ, 0);
+			if (cBlockDoorHandler::IsOpen(ChunkInterface, BlockX, a_RelBlockY, BlockZ))
+			{
+				cBlockDoorHandler::SetOpen(ChunkInterface, BlockX, a_RelBlockY, BlockZ, false);
+				m_Chunk->BroadcastSoundParticleEffect(1003, BlockX, a_RelBlockY, BlockZ, 0);
+			}
 			SetPlayerToggleableBlockAsSimulated(a_RelBlockX, a_RelBlockY, a_RelBlockZ, false);
 		}
 	}
@@ -1730,7 +1796,8 @@ void cIncrementalRedstoneSimulator::SetBlockPowered(int a_RelBlockX, int a_RelBl
 		return;
 	}
 
-	PoweredBlocksList * Powered = m_Chunk->GetNeighborChunk(BlockX, BlockZ)->GetRedstoneSimulatorPoweredBlocksList();
+	cChunk * Neighbour = m_Chunk->GetNeighborChunk(BlockX, BlockZ);
+	PoweredBlocksList * Powered = Neighbour->GetRedstoneSimulatorPoweredBlocksList();
 	for (PoweredBlocksList::iterator itr = Powered->begin(); itr != Powered->end(); ++itr)  // Check powered list
 	{
 		if (
@@ -1762,6 +1829,8 @@ void cIncrementalRedstoneSimulator::SetBlockPowered(int a_RelBlockX, int a_RelBl
 	RC.a_SourcePos = Vector3i(SourceX, a_RelSourceY, SourceZ);
 	RC.a_PowerLevel = a_PowerLevel;
 	Powered->push_back(RC);
+	Neighbour->SetIsRedstoneDirty(true);
+	m_Chunk->SetIsRedstoneDirty(true);
 }
 
 
@@ -1801,7 +1870,8 @@ void cIncrementalRedstoneSimulator::SetBlockLinkedPowered(
 		return;
 	}
 
-	LinkedBlocksList * Linked = m_Chunk->GetNeighborChunk(BlockX, BlockZ)->GetRedstoneSimulatorLinkedBlocksList();
+	cChunk * Neighbour = m_Chunk->GetNeighborChunk(BlockX, BlockZ);
+	LinkedBlocksList * Linked = Neighbour->GetRedstoneSimulatorLinkedBlocksList();
 	for (LinkedBlocksList::iterator itr = Linked->begin(); itr != Linked->end(); ++itr)  // Check linked powered list
 	{
 		if (
@@ -1822,6 +1892,8 @@ void cIncrementalRedstoneSimulator::SetBlockLinkedPowered(
 	RC.a_SourcePos = Vector3i(SourceX, a_RelSourceY, SourceZ);
 	RC.a_PowerLevel = a_PowerLevel;
 	Linked->push_back(RC);
+	Neighbour->SetIsRedstoneDirty(true);
+	m_Chunk->SetIsRedstoneDirty(true);
 }
 
 
@@ -1861,7 +1933,7 @@ void cIncrementalRedstoneSimulator::SetPlayerToggleableBlockAsSimulated(int a_Re
 
 
 
-void cIncrementalRedstoneSimulator::QueueRepeaterPowerChange(int a_RelBlockX, int a_RelBlockY, int a_RelBlockZ, NIBBLETYPE a_Meta, bool ShouldPowerOn)
+bool cIncrementalRedstoneSimulator::QueueRepeaterPowerChange(int a_RelBlockX, int a_RelBlockY, int a_RelBlockZ, NIBBLETYPE a_Meta, bool ShouldPowerOn)
 {
 	for (RepeatersDelayList::iterator itr = m_RepeatersDelayList->begin(); itr != m_RepeatersDelayList->end(); ++itr)
 	{
@@ -1869,14 +1941,14 @@ void cIncrementalRedstoneSimulator::QueueRepeaterPowerChange(int a_RelBlockX, in
 		{
 			if (ShouldPowerOn == itr->ShouldPowerOn) // We are queued already for the same thing, don't replace entry
 			{
-				return;
+				return false;
 			}
 
 			// Already in here (normal to allow repeater to continue on powering and updating blocks in front) - just update info and quit
 			itr->a_DelayTicks = (((a_Meta & 0xC) >> 0x2) + 1) * 2; // See below for description
 			itr->a_ElapsedTicks = 0;
 			itr->ShouldPowerOn = ShouldPowerOn;
-			return;
+			return false;
 		}
 	}
 
@@ -1891,7 +1963,7 @@ void cIncrementalRedstoneSimulator::QueueRepeaterPowerChange(int a_RelBlockX, in
 	RC.a_ElapsedTicks = 0;
 	RC.ShouldPowerOn = ShouldPowerOn;
 	m_RepeatersDelayList->push_back(RC);
-	return;
+	return true;
 }
 
 
diff --git a/src/Simulator/IncrementalRedstoneSimulator.h b/src/Simulator/IncrementalRedstoneSimulator.h
index 233a3d408..83076311a 100644
--- a/src/Simulator/IncrementalRedstoneSimulator.h
+++ b/src/Simulator/IncrementalRedstoneSimulator.h
@@ -108,7 +108,7 @@ private:
 	/** Handles redstone wire */
 	void HandleRedstoneWire(int a_RelBlockX, int a_RelBlockY, int a_RelBlockZ);
 	/** Handles repeaters */
-	void HandleRedstoneRepeater(int a_RelBlockX, int a_RelBlockY, int a_RelBlockZ, BLOCKTYPE a_MyState);
+	void HandleRedstoneRepeater(int a_RelBlockX, int a_RelBlockY, int a_RelBlockZ, BLOCKTYPE a_MyState, RepeatersDelayList::iterator a_Itr);
 	/* ====================== */
 
 	/* ====== DEVICES ====== */
@@ -145,8 +145,8 @@ private:
 	void SetDirectionLinkedPowered(int a_RelBlockX, int a_RelBlockY, int a_RelBlockZ, char a_Direction, unsigned char a_PowerLevel = MAX_POWER_LEVEL);
 	/** Marks all blocks immediately surrounding a coordinate as powered */
 	void SetAllDirsAsPowered(int a_RelBlockX, int a_RelBlockY, int a_RelBlockZ, unsigned char a_PowerLevel = MAX_POWER_LEVEL);
-	/** Queues a repeater to be powered or unpowered */
-	void QueueRepeaterPowerChange(int a_RelBlockX, int a_RelBlockY, int a_RelBlockZ, NIBBLETYPE a_Meta, bool ShouldPowerOn);
+	/** Queues a repeater to be powered or unpowered and returns if the m_RepeatersDelayList iterators were invalidated */
+	bool QueueRepeaterPowerChange(int a_RelBlockX, int a_RelBlockY, int a_RelBlockZ, NIBBLETYPE a_Meta, bool ShouldPowerOn);
 
 	/** Returns if a coordinate is powered or linked powered */
 	bool AreCoordsPowered(int a_RelBlockX, int a_RelBlockY, int a_RelBlockZ) { return AreCoordsDirectlyPowered(a_RelBlockX, a_RelBlockY, a_RelBlockZ) || AreCoordsLinkedPowered(a_RelBlockX, a_RelBlockY, a_RelBlockZ); }
diff --git a/src/Simulator/SandSimulator.cpp b/src/Simulator/SandSimulator.cpp
index b8f34559f..1380f8841 100644
--- a/src/Simulator/SandSimulator.cpp
+++ b/src/Simulator/SandSimulator.cpp
@@ -60,7 +60,7 @@ void cSandSimulator::SimulateChunk(float a_Dt, int a_ChunkX, int a_ChunkZ, cChun
 			);
 			*/
 			cFallingBlock * FallingBlock = new cFallingBlock(Pos, BlockType, a_Chunk->GetMeta(itr->x, itr->y, itr->z));
-			FallingBlock->Initialize(&m_World);
+			FallingBlock->Initialize(m_World);
 			a_Chunk->SetBlock(itr->x, itr->y, itr->z, E_BLOCK_AIR, 0);
 		}
 	}
diff --git a/src/UI/Window.cpp b/src/UI/Window.cpp
index c0e2cef64..3922ac489 100644
--- a/src/UI/Window.cpp
+++ b/src/UI/Window.cpp
@@ -854,6 +854,7 @@ void cAnvilWindow::GetBlockPos(int & a_PosX, int & a_PosY, int & a_PosZ)
 
 cEnchantingWindow::cEnchantingWindow(int a_BlockX, int a_BlockY, int a_BlockZ) :
 	cWindow(wtEnchantment, "Enchant"),
+	m_SlotArea(),
 	m_BlockX(a_BlockX),
 	m_BlockY(a_BlockY),
 	m_BlockZ(a_BlockZ)
diff --git a/src/World.cpp b/src/World.cpp
index 1f4a88fa0..6904000ea 100644
--- a/src/World.cpp
+++ b/src/World.cpp
@@ -813,6 +813,20 @@ void cWorld::Tick(float a_Dt, int a_LastTickDurationMSec)
 		m_LastTimeUpdate = m_WorldAge;
 	}
 
+	// Add entities waiting in the queue to be added:
+	{
+		cCSLock Lock(m_CSEntitiesToAdd);
+		for (cEntityList::iterator itr = m_EntitiesToAdd.begin(), end = m_EntitiesToAdd.end(); itr != end; ++itr)
+		{
+			(*itr)->SetWorld(this);
+			m_ChunkMap->AddEntity(*itr);
+		}
+		m_EntitiesToAdd.clear();
+	}
+
+	// Add players waiting in the queue to be added:
+	AddQueuedPlayers();
+
 	m_ChunkMap->Tick(a_Dt);
 
 	TickClients(a_Dt);
@@ -1701,7 +1715,7 @@ void cWorld::SpawnItemPickups(const cItems & a_Pickups, double a_BlockX, double
 			a_BlockX, a_BlockY, a_BlockZ,
 			*itr, IsPlayerCreated, SpeedX, SpeedY, SpeedZ
 		);
-		Pickup->Initialize(this);
+		Pickup->Initialize(*this);
 	}
 }
 
@@ -1722,7 +1736,7 @@ void cWorld::SpawnItemPickups(const cItems & a_Pickups, double a_BlockX, double
 			a_BlockX, a_BlockY, a_BlockZ,
 			*itr, IsPlayerCreated, (float)a_SpeedX, (float)a_SpeedY, (float)a_SpeedZ
 		);
-		Pickup->Initialize(this);
+		Pickup->Initialize(*this);
 	}
 }
 
@@ -1733,7 +1747,7 @@ void cWorld::SpawnItemPickups(const cItems & a_Pickups, double a_BlockX, double
 int cWorld::SpawnFallingBlock(int a_X, int a_Y, int a_Z, BLOCKTYPE BlockType, NIBBLETYPE BlockMeta)
 {
 	cFallingBlock * FallingBlock = new cFallingBlock(Vector3i(a_X, a_Y, a_Z), BlockType, BlockMeta);
-	FallingBlock->Initialize(this);
+	FallingBlock->Initialize(*this);
 	return FallingBlock->GetUniqueID();
 }
 
@@ -1749,7 +1763,7 @@ int cWorld::SpawnExperienceOrb(double a_X, double a_Y, double a_Z, int a_Reward)
 	}
 
 	cExpOrb * ExpOrb = new cExpOrb(a_X, a_Y, a_Z, a_Reward);
-	ExpOrb->Initialize(this);
+	ExpOrb->Initialize(*this);
 	return ExpOrb->GetUniqueID();
 }
 
@@ -1772,7 +1786,7 @@ int cWorld::SpawnMinecart(double a_X, double a_Y, double a_Z, int a_MinecartType
 			return -1;
 		}
 	}  // switch (a_MinecartType)
-	Minecart->Initialize(this);
+	Minecart->Initialize(*this);
 	return Minecart->GetUniqueID();
 }
 
@@ -1783,7 +1797,7 @@ int cWorld::SpawnMinecart(double a_X, double a_Y, double a_Z, int a_MinecartType
 void cWorld::SpawnPrimedTNT(double a_X, double a_Y, double a_Z, int a_FuseTicks, double a_InitialVelocityCoeff)
 {
 	cTNTEntity * TNT = new cTNTEntity(a_X, a_Y, a_Z, a_FuseTicks);
-	TNT->Initialize(this);
+	TNT->Initialize(*this);
 	TNT->SetSpeed(
 		a_InitialVelocityCoeff * (GetTickRandomNumber(2) - 1), /** -1, 0, 1 */
 		a_InitialVelocityCoeff * 2,
@@ -2299,7 +2313,7 @@ void cWorld::SetChunkData(
 	// Initialize the entities (outside the m_ChunkMap's CS, to fix FS #347):
 	for (cEntityList::iterator itr = a_Entities.begin(), end = a_Entities.end(); itr != end; ++itr)
 	{
-		(*itr)->Initialize(this);
+		(*itr)->Initialize(*this);
 	}
 	
 	// If a client is requesting this chunk, send it to them:
@@ -2392,23 +2406,8 @@ void cWorld::CollectPickupsByPlayer(cPlayer * a_Player)
 
 void cWorld::AddPlayer(cPlayer * a_Player)
 {
-	{
-		cCSLock Lock(m_CSPlayers);
-		
-		ASSERT(std::find(m_Players.begin(), m_Players.end(), a_Player) == m_Players.end());  // Is it already in the list? HOW?
-		
-		m_Players.remove(a_Player);  // Make sure the player is registered only once
-		m_Players.push_back(a_Player);
-	}
-	
-	// Add the player's client to the list of clients to be ticked:
-	if (a_Player->GetClientHandle() != NULL)
-	{
-		cCSLock Lock(m_CSClients);
-		m_ClientsToAdd.push_back(a_Player->GetClientHandle());
-	}
-
-	// The player has already been added to the chunkmap as the entity, do NOT add again!
+	cCSLock Lock(m_CSPlayersToAdd);
+	m_PlayersToAdd.push_back(a_Player);
 }
 
 
@@ -2417,17 +2416,26 @@ void cWorld::AddPlayer(cPlayer * a_Player)
 
 void cWorld::RemovePlayer(cPlayer * a_Player)
 {
+
 	m_ChunkMap->RemoveEntity(a_Player);
 	{
+		cCSLock Lock(m_CSPlayersToAdd);
+		m_PlayersToAdd.remove(a_Player);
+	}
+	{
 		cCSLock Lock(m_CSPlayers);
+		LOGD("Removing player \"%s\" from world \"%s\".", a_Player->GetName().c_str(), m_WorldName.c_str());
 		m_Players.remove(a_Player);
 	}
 	
 	// Remove the player's client from the list of clients to be ticked:
-	if (a_Player->GetClientHandle() != NULL)
+	cClientHandle * Client = a_Player->GetClientHandle();
+	if (Client != NULL)
 	{
+		Client->RemoveFromWorld();
+		m_ChunkMap->RemoveClientFromChunks(Client);
 		cCSLock Lock(m_CSClients);
-		m_ClientsToRemove.push_back(a_Player->GetClientHandle());
+		m_ClientsToRemove.push_back(Client);
 	}
 }
 
@@ -2878,9 +2886,11 @@ void cWorld::ScheduleTask(int a_DelayTicks, cTask * a_Task)
 
 
 
+
 void cWorld::AddEntity(cEntity * a_Entity)
 {
-	m_ChunkMap->AddEntity(a_Entity);
+	cCSLock Lock(m_CSEntitiesToAdd);
+	m_EntitiesToAdd.push_back(a_Entity);
 }
 
 
@@ -2889,6 +2899,19 @@ void cWorld::AddEntity(cEntity * a_Entity)
 
 bool cWorld::HasEntity(int a_UniqueID)
 {
+	// Check if the entity is in the queue to be added to the world:
+	{
+		cCSLock Lock(m_CSEntitiesToAdd);
+		for (cEntityList::const_iterator itr = m_EntitiesToAdd.begin(), end = m_EntitiesToAdd.end(); itr != end; ++itr)
+		{
+			if ((*itr)->GetUniqueID() == a_UniqueID)
+			{
+				return true;
+			}
+		}  // for itr - m_EntitiesToAdd[]
+	}
+
+	// Check if the entity is in the chunkmap:
 	return m_ChunkMap->HasEntity(a_UniqueID);
 }
 
@@ -3021,7 +3044,7 @@ int cWorld::SpawnMobFinalize(cMonster * a_Monster)
 		delete a_Monster;
 		return -1;
 	}
-	if (!a_Monster->Initialize(this))
+	if (!a_Monster->Initialize(*this))
 	{
 		delete a_Monster;
 		return -1;
@@ -3043,7 +3066,7 @@ int cWorld::CreateProjectile(double a_PosX, double a_PosY, double a_PosZ, cProje
 	{
 		return -1;
 	}
-	if (!Projectile->Initialize(this))
+	if (!Projectile->Initialize(*this))
 	{
 		delete Projectile;
 		return -1;
@@ -3173,6 +3196,60 @@ cFluidSimulator * cWorld::InitializeFluidSimulator(cIniFile & a_IniFile, const c
 
 
 
+void cWorld::AddQueuedPlayers(void)
+{
+	ASSERT(m_TickThread.IsCurrentThread());
+
+	// Grab the list of players to add, it has to be locked to access it:
+	cPlayerList PlayersToAdd;
+	{
+		cCSLock Lock(m_CSPlayersToAdd);
+		std::swap(PlayersToAdd, m_PlayersToAdd);
+	}
+	
+	// Add all the players in the grabbed list:
+	{
+		cCSLock Lock(m_CSPlayers);
+		for (cPlayerList::iterator itr = PlayersToAdd.begin(), end = PlayersToAdd.end(); itr != end; ++itr)
+		{
+			ASSERT(std::find(m_Players.begin(), m_Players.end(), *itr) == m_Players.end());  // Is it already in the list? HOW?
+
+			m_Players.push_back(*itr);
+			(*itr)->SetWorld(this);
+
+			// Add to chunkmap, if not already there (Spawn vs MoveToWorld):
+			m_ChunkMap->AddEntityIfNotPresent(*itr);
+		}  // for itr - PlayersToAdd[]
+	}  // Lock(m_CSPlayers)
+
+	// Add all the players' clienthandles:
+	{
+		cCSLock Lock(m_CSClients);
+		for (cPlayerList::iterator itr = PlayersToAdd.begin(), end = PlayersToAdd.end(); itr != end; ++itr)
+		{
+			cClientHandle * Client = (*itr)->GetClientHandle();
+			if (Client != NULL)
+			{
+				m_Clients.push_back(Client);
+			}
+		}  // for itr - PlayersToAdd[]
+	}  // Lock(m_CSClients)
+
+	// Stream chunks to all eligible clients:
+	for (cPlayerList::iterator itr = PlayersToAdd.begin(), end = PlayersToAdd.end(); itr != end; ++itr)
+	{
+		cClientHandle * Client = (*itr)->GetClientHandle();
+		if (Client != NULL)
+		{
+			Client->StreamChunks();
+		}
+	}  // for itr - PlayersToAdd[]
+}
+
+
+
+
+
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 // cWorld::cTaskSaveAllChunks:
 
@@ -3313,4 +3390,3 @@ void cWorld::cChunkGeneratorCallbacks::CallHookChunkGenerated (cChunkDesc & a_Ch
 
 
 
-
diff --git a/src/World.h b/src/World.h
index 676c5d69a..6ac58b09e 100644
--- a/src/World.h
+++ b/src/World.h
@@ -284,8 +284,15 @@ public:
 	
 	void CollectPickupsByPlayer(cPlayer * a_Player);
 
-	void AddPlayer( cPlayer* a_Player );
-	void RemovePlayer( cPlayer* a_Player );
+	/** Adds the player to the world.
+	Uses a queue to store the player object until the Tick thread processes the addition event.
+	Also adds the player as an entity in the chunkmap, and the player's ClientHandle, if any, for ticking. */
+	void AddPlayer(cPlayer * a_Player);
+
+	/** Removes the player from the world.
+	Removes the player from the addition queue, too, if appropriate.
+	If the player has a ClientHandle, the ClientHandle is removed from all chunks in the world and will not be ticked by this world anymore. */
+	void RemovePlayer(cPlayer * a_Player);
 
 	/** Calls the callback for each player in the list; returns true if all players processed, false if the callback aborted by returning true */
 	virtual bool ForEachPlayer(cPlayerListCallback & a_Callback) override;  // >> EXPORTED IN MANUALBINDINGS <<
@@ -301,7 +308,8 @@ public:
 	
 	void SendPlayerList(cPlayer * a_DestPlayer);  // Sends playerlist to the player
 
-	/** Adds the entity into its appropriate chunk; takes ownership of the entity ptr */
+	/** Adds the entity into its appropriate chunk; takes ownership of the entity ptr.
+	The entity is added lazily - this function only puts it in a queue that is then processed by the Tick thread. */
 	void AddEntity(cEntity * a_Entity);
 	
 	bool HasEntity(int a_UniqueID);
@@ -961,6 +969,18 @@ private:
 	/** Clients that are scheduled for adding, waiting for TickClients to add them */
 	cClientHandleList m_ClientsToAdd;
 
+	/** Guards m_EntitiesToAdd */
+	cCriticalSection m_CSEntitiesToAdd;
+
+	/** List of entities that are scheduled for adding, waiting for the Tick thread to add them. */
+	cEntityList m_EntitiesToAdd;
+
+	/** Guards m_PlayersToAdd */
+	cCriticalSection m_CSPlayersToAdd;
+
+	/** List of players that are scheduled for adding, waiting for the Tick thread to add them. */
+	cPlayerList m_PlayersToAdd;
+
 
 	cWorld(const AString & a_WorldName, eDimension a_Dimension = dimOverworld, const AString & a_OverworldName = "");
 	virtual ~cWorld();
@@ -998,6 +1018,10 @@ private:
 
 	/** Creates a new redstone simulator.*/
 	cRedstoneSimulator * InitializeRedstoneSimulator(cIniFile & a_IniFile);
+
+	/** Adds the players queued in the m_PlayersToAdd queue into the m_Players list.
+	Assumes it is called from the Tick thread. */
+	void AddQueuedPlayers(void);
 }; // tolua_export