48 files changed, 1489 insertions, 786 deletions

diff --git a/MCServer/Plugins/APIDump/APIDesc.lua b/MCServer/Plugins/APIDump/APIDesc.lua
index ba3763724..b2c7108e9 100644
--- a/MCServer/Plugins/APIDump/APIDesc.lua
+++ b/MCServer/Plugins/APIDump/APIDesc.lua
@@ -1840,7 +1840,9 @@ a_Player:OpenWindow(Window);
 				MoveToWorld = { Params = "WorldName", Return = "bool", Return = "Moves the player to the specified world. Returns true if successful." },
 				OpenWindow = { Params = "{{cWindow|Window}}", Return = "", Notes = "Opens the specified UI window for the player." },
 				PermissionMatches = { Params = "Permission, Template", Return = "bool", Notes = "(STATIC) Returns true if the specified permission matches the specified template. The template may contain wildcards." },
+				PlaceBlock = { Params = "BlockX, BlockY, BlockZ, BlockType, BlockMeta", Return = "bool", Notes = "Places a block while impersonating the player. The {{OnPlayerPlacingBlock|HOOK_PLAYER_PLACING_BLOCK}} hook is called before the placement, and if it succeeds, the block is placed and the {{OnPlayerPlacedBlock|HOOK_PLAYER_PLACED_BLOCK}} hook is called. Returns true iff the block is successfully placed. Assumes that the block is in a currently loaded chunk." },
 				Respawn = { Params = "", Return = "", Notes = "Restores the health, extinguishes fire, makes visible and sends the Respawn packet." },
+				SendBlocksAround = { Params = "BlockX, BlockY, BlockZ, [Range]", Return = "", Notes = "Sends all the world's blocks in Range from the specified coords to the player, as a BlockChange packet. Range defaults to 1 (only one block sent)." },
 				SendMessage = { Params = "Message", Return = "", Notes = "Sends the specified message to the player." },
 				SendMessageFailure = { Params = "Message", Return = "", Notes = "Prepends Rose [INFO] / colours entire text (depending on ShouldUseChatPrefixes()) and sends message to player. For a command that failed to run because of insufficient permissions, etc." },
 				SendMessageFatal = { Params = "Message", Return = "", Notes = "Prepends Red [FATAL] / colours entire text (depending on ShouldUseChatPrefixes()) and sends message to player. For something serious, such as a plugin crash, etc." },
diff --git a/MCServer/Plugins/APIDump/Hooks/OnPlayerPlacedBlock.lua b/MCServer/Plugins/APIDump/Hooks/OnPlayerPlacedBlock.lua
index 54888a6db..6445a76b4 100644
--- a/MCServer/Plugins/APIDump/Hooks/OnPlayerPlacedBlock.lua
+++ b/MCServer/Plugins/APIDump/Hooks/OnPlayerPlacedBlock.lua
@@ -12,7 +12,11 @@ return
 			Use the {{cPlayer}}:GetWorld() function to get the world to which the block belongs.</p>
 			<p>
 			See also the {{OnPlayerPlacingBlock|HOOK_PLAYER_PLACING_BLOCK}} hook for a similar hook called
-			before the placement.
+			before the placement.</p>
+			<p>
+			If the client action results in multiple blocks being placed (such as a bed or a door), each separate
+			block is reported through this hook. All the blocks are already present in the world before the first
+			instance of this hook is called.
 		]],
 		Params =
 		{
@@ -20,10 +24,6 @@ return
 			{ Name = "BlockX", Type = "number", Notes = "X-coord of the block" },
 			{ Name = "BlockY", Type = "number", Notes = "Y-coord of the block" },
 			{ Name = "BlockZ", Type = "number", Notes = "Z-coord of the block" },
-			{ Name = "BlockFace", Type = "number", Notes = "Face of the existing block upon which the player interacted. One of the BLOCK_FACE_ constants" },
-			{ Name = "CursorX", Type = "number", Notes = "X-coord of the cursor within the block face (0 .. 15)" },
-			{ Name = "CursorY", Type = "number", Notes = "Y-coord of the cursor within the block face (0 .. 15)" },
-			{ Name = "CursorZ", Type = "number", Notes = "Z-coord of the cursor within the block face (0 .. 15)" },
 			{ Name = "BlockType", Type = "BLOCKTYPE", Notes = "The block type of the block" },
 			{ Name = "BlockMeta", Type = "NIBBLETYPE", Notes = "The block meta of the block" },
 		},
diff --git a/MCServer/Plugins/APIDump/Hooks/OnPlayerPlacingBlock.lua b/MCServer/Plugins/APIDump/Hooks/OnPlayerPlacingBlock.lua
index 2a928390b..4241a09aa 100644
--- a/MCServer/Plugins/APIDump/Hooks/OnPlayerPlacingBlock.lua
+++ b/MCServer/Plugins/APIDump/Hooks/OnPlayerPlacingBlock.lua
@@ -15,7 +15,11 @@ return
 			Use the {{cPlayer}}:GetWorld() function to get the world to which the block belongs.</p>
 			<p>
 			See also the {{OnPlayerPlacedBlock|HOOK_PLAYER_PLACED_BLOCK}} hook for a similar hook called after
-			the placement.
+			the placement.</p>
+			<p>
+			If the client action results in multiple blocks being placed (such as a bed or a door), each separate
+			block is reported through this hook and only if all of them succeed, all the blocks are placed. If
+			any one of the calls are refused by the plugin, all the blocks are refused and reverted on the client.
 		]],
 		Params =
 		{
@@ -23,10 +27,6 @@ return
 			{ Name = "BlockX", Type = "number", Notes = "X-coord of the block" },
 			{ Name = "BlockY", Type = "number", Notes = "Y-coord of the block" },
 			{ Name = "BlockZ", Type = "number", Notes = "Z-coord of the block" },
-			{ Name = "BlockFace", Type = "number", Notes = "Face of the existing block upon which the player is interacting. One of the BLOCK_FACE_ constants" },
-			{ Name = "CursorX", Type = "number", Notes = "X-coord of the cursor within the block face (0 .. 15)" },
-			{ Name = "CursorY", Type = "number", Notes = "Y-coord of the cursor within the block face (0 .. 15)" },
-			{ Name = "CursorZ", Type = "number", Notes = "Z-coord of the cursor within the block face (0 .. 15)" },
 			{ Name = "BlockType", Type = "BLOCKTYPE", Notes = "The block type of the block" },
 			{ Name = "BlockMeta", Type = "NIBBLETYPE", Notes = "The block meta of the block" },
 		},
diff --git a/src/Bindings/Plugin.h b/src/Bindings/Plugin.h
index 08677553c..b5944e9cb 100644
--- a/src/Bindings/Plugin.h
+++ b/src/Bindings/Plugin.h
@@ -76,8 +76,8 @@ public:
 	virtual bool OnPlayerJoined             (cPlayer & a_Player) = 0;
 	virtual bool OnPlayerLeftClick          (cPlayer & a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, char a_Status) = 0;
 	virtual bool OnPlayerMoving             (cPlayer & a_Player, const Vector3d & a_OldPosition, const Vector3d & a_NewPosition) = 0;
-	virtual bool OnPlayerPlacedBlock        (cPlayer & a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, int a_CursorX, int a_CursorY, int a_CursorZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta) = 0;
-	virtual bool OnPlayerPlacingBlock       (cPlayer & a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, int a_CursorX, int a_CursorY, int a_CursorZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta) = 0;
+	virtual bool OnPlayerPlacedBlock        (cPlayer & a_Player, const sSetBlock & a_BlockChange) = 0;
+	virtual bool OnPlayerPlacingBlock       (cPlayer & a_Player, const sSetBlock & a_BlockChange) = 0;
 	virtual bool OnPlayerRightClick         (cPlayer & a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, int a_CursorX, int a_CursorY, int a_CursorZ) = 0;
 	virtual bool OnPlayerRightClickingEntity(cPlayer & a_Player, cEntity & a_Entity) = 0;
 	virtual bool OnPlayerShooting           (cPlayer & a_Player) = 0;
diff --git a/src/Bindings/PluginLua.cpp b/src/Bindings/PluginLua.cpp
index ea782ea3f..cc3146610 100644
--- a/src/Bindings/PluginLua.cpp
+++ b/src/Bindings/PluginLua.cpp
@@ -857,14 +857,19 @@ bool cPluginLua::OnPlayerMoving(cPlayer & a_Player, const Vector3d & a_OldPositi
 
 
 
-bool cPluginLua::OnPlayerPlacedBlock(cPlayer & a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, int a_CursorX, int a_CursorY, int a_CursorZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)
+bool cPluginLua::OnPlayerPlacedBlock(cPlayer & a_Player, const sSetBlock & a_BlockChange)
 {
 	cCSLock Lock(m_CriticalSection);
 	bool res = false;
 	cLuaRefs & Refs = m_HookMap[cPluginManager::HOOK_PLAYER_PLACED_BLOCK];
 	for (cLuaRefs::iterator itr = Refs.begin(), end = Refs.end(); itr != end; ++itr)
 	{
-		m_LuaState.Call((int)(**itr), &a_Player, a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, a_CursorX, a_CursorY, a_CursorZ, a_BlockType, a_BlockMeta, cLuaState::Return, res);
+		m_LuaState.Call((int)(**itr), &a_Player,
+			a_BlockChange.GetX(), a_BlockChange.GetY(), a_BlockChange.GetZ(),
+			a_BlockChange.m_BlockType, a_BlockChange.m_BlockMeta,
+			cLuaState::Return,
+			res
+		);
 		if (res)
 		{
 			return true;
@@ -877,14 +882,19 @@ bool cPluginLua::OnPlayerPlacedBlock(cPlayer & a_Player, int a_BlockX, int a_Blo
 
 
 
-bool cPluginLua::OnPlayerPlacingBlock(cPlayer & a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, int a_CursorX, int a_CursorY, int a_CursorZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)
+bool cPluginLua::OnPlayerPlacingBlock(cPlayer & a_Player, const sSetBlock & a_BlockChange)
 {
 	cCSLock Lock(m_CriticalSection);
 	bool res = false;
 	cLuaRefs & Refs = m_HookMap[cPluginManager::HOOK_PLAYER_PLACING_BLOCK];
 	for (cLuaRefs::iterator itr = Refs.begin(), end = Refs.end(); itr != end; ++itr)
 	{
-		m_LuaState.Call((int)(**itr), &a_Player, a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, a_CursorX, a_CursorY, a_CursorZ, a_BlockType, a_BlockMeta, cLuaState::Return, res);
+		m_LuaState.Call((int)(**itr), &a_Player,
+			a_BlockChange.GetX(), a_BlockChange.GetY(), a_BlockChange.GetZ(),
+			a_BlockChange.m_BlockType, a_BlockChange.m_BlockMeta,
+			cLuaState::Return,
+			res
+		);
 		if (res)
 		{
 			return true;
diff --git a/src/Bindings/PluginLua.h b/src/Bindings/PluginLua.h
index 7de5ffec4..ad3f82b42 100644
--- a/src/Bindings/PluginLua.h
+++ b/src/Bindings/PluginLua.h
@@ -100,8 +100,8 @@ public:
 	virtual bool OnPlayerJoined             (cPlayer & a_Player) override;
 	virtual bool OnPlayerLeftClick          (cPlayer & a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, char a_Status) override;
 	virtual bool OnPlayerMoving             (cPlayer & a_Player, const Vector3d & a_OldPosition, const Vector3d & a_NewPosition) override;
-	virtual bool OnPlayerPlacedBlock        (cPlayer & a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, int a_CursorX, int a_CursorY, int a_CursorZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta) override;
-	virtual bool OnPlayerPlacingBlock       (cPlayer & a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, int a_CursorX, int a_CursorY, int a_CursorZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta) override;
+	virtual bool OnPlayerPlacedBlock        (cPlayer & a_Player, const sSetBlock & a_BlockChange) override;
+	virtual bool OnPlayerPlacingBlock       (cPlayer & a_Player, const sSetBlock & a_BlockChange) override;
 	virtual bool OnPlayerRightClick         (cPlayer & a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, int a_CursorX, int a_CursorY, int a_CursorZ) override;
 	virtual bool OnPlayerRightClickingEntity(cPlayer & a_Player, cEntity & a_Entity) override;
 	virtual bool OnPlayerShooting           (cPlayer & a_Player) override;
diff --git a/src/Bindings/PluginManager.cpp b/src/Bindings/PluginManager.cpp
index 406a540f4..fad0a36d2 100644
--- a/src/Bindings/PluginManager.cpp
+++ b/src/Bindings/PluginManager.cpp
@@ -866,14 +866,14 @@ bool cPluginManager::CallHookPlayerMoving(cPlayer & a_Player, const Vector3d a_O
 
 
 
-bool cPluginManager::CallHookPlayerPlacedBlock(cPlayer & a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, int a_CursorX, int a_CursorY, int a_CursorZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)
+bool cPluginManager::CallHookPlayerPlacedBlock(cPlayer & a_Player, const sSetBlock & a_BlockChange)
 {
 	FIND_HOOK(HOOK_PLAYER_PLACED_BLOCK);
 	VERIFY_HOOK;
 
 	for (PluginList::iterator itr = Plugins->second.begin(); itr != Plugins->second.end(); ++itr)
 	{
-		if ((*itr)->OnPlayerPlacedBlock(a_Player, a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, a_CursorX, a_CursorY, a_CursorZ, a_BlockType, a_BlockMeta))
+		if ((*itr)->OnPlayerPlacedBlock(a_Player, a_BlockChange))
 		{
 			return true;
 		}
@@ -885,14 +885,14 @@ bool cPluginManager::CallHookPlayerPlacedBlock(cPlayer & a_Player, int a_BlockX,
 
 
 
-bool cPluginManager::CallHookPlayerPlacingBlock(cPlayer & a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, int a_CursorX, int a_CursorY, int a_CursorZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)
+bool cPluginManager::CallHookPlayerPlacingBlock(cPlayer & a_Player, const sSetBlock & a_BlockChange)
 {
 	FIND_HOOK(HOOK_PLAYER_PLACING_BLOCK);
 	VERIFY_HOOK;
 
 	for (PluginList::iterator itr = Plugins->second.begin(); itr != Plugins->second.end(); ++itr)
 	{
-		if ((*itr)->OnPlayerPlacingBlock(a_Player, a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, a_CursorX, a_CursorY, a_CursorZ, a_BlockType, a_BlockMeta))
+		if ((*itr)->OnPlayerPlacingBlock(a_Player, a_BlockChange))
 		{
 			return true;
 		}
diff --git a/src/Bindings/PluginManager.h b/src/Bindings/PluginManager.h
index 3a2aecc92..d4b82376a 100644
--- a/src/Bindings/PluginManager.h
+++ b/src/Bindings/PluginManager.h
@@ -207,10 +207,10 @@ public:
 	bool CallHookPlayerFishing            (cPlayer & a_Player, cItems a_Reward);
 	bool CallHookPlayerFoodLevelChange    (cPlayer & a_Player, int a_NewFoodLevel);
 	bool CallHookPlayerJoined             (cPlayer & a_Player);
-	bool CallHookPlayerMoving             (cPlayer & a_Player, const Vector3d a_OldPosition, const Vector3d a_NewPosition);
 	bool CallHookPlayerLeftClick          (cPlayer & a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, char a_Status);
-	bool CallHookPlayerPlacedBlock        (cPlayer & a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, int a_CursorX, int a_CursorY, int a_CursorZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta);
-	bool CallHookPlayerPlacingBlock       (cPlayer & a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, int a_CursorX, int a_CursorY, int a_CursorZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta);
+	bool CallHookPlayerMoving             (cPlayer & a_Player, const Vector3d a_OldPosition, const Vector3d a_NewPosition);
+	bool CallHookPlayerPlacedBlock        (cPlayer & a_Player, const sSetBlock & a_BlockChange);
+	bool CallHookPlayerPlacingBlock       (cPlayer & a_Player, const sSetBlock & a_BlockChange);
 	bool CallHookPlayerRightClick         (cPlayer & a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, int a_CursorX, int a_CursorY, int a_CursorZ);
 	bool CallHookPlayerRightClickingEntity(cPlayer & a_Player, cEntity & a_Entity);
 	bool CallHookPlayerShooting           (cPlayer & a_Player);
diff --git a/src/Blocks/BlockBed.cpp b/src/Blocks/BlockBed.cpp
index 3b6328b38..57b9855d0 100644
--- a/src/Blocks/BlockBed.cpp
+++ b/src/Blocks/BlockBed.cpp
@@ -14,24 +14,6 @@
 
 
 
-void cBlockBedHandler::OnPlacedByPlayer(
-	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,
-	BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta
-)
-{
-	if (a_BlockMeta < 8)
-	{
-		Vector3i Direction = MetaDataToDirection(a_BlockMeta);
-		a_ChunkInterface.SetBlock(a_BlockX + Direction.x, a_BlockY, a_BlockZ + Direction.z, E_BLOCK_BED, a_BlockMeta | 0x8);
-	}
-}
-
-
-
-
-
 void cBlockBedHandler::OnDestroyed(cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface, int a_BlockX, int a_BlockY, int a_BlockZ)
 {
 	NIBBLETYPE OldMeta = a_ChunkInterface.GetBlockMeta(a_BlockX, a_BlockY, a_BlockZ);
@@ -151,7 +133,7 @@ void cBlockBedHandler::OnUse(cChunkInterface & a_ChunkInterface, cWorldInterface
 					cPlayerBedStateUnsetter Unsetter(Vector3i(a_BlockX + PillowDirection.x, a_BlockY, a_BlockZ + PillowDirection.z), a_WorldInterface);
 					a_WorldInterface.ForEachPlayer(Unsetter);
 					a_WorldInterface.SetTimeOfDay(0);
-					a_ChunkInterface.SetBlockMeta(a_BlockX, a_BlockY, a_BlockZ, Meta & 0xB);  // Where 0xB = 1011, and zero is to make sure 'occupied' bit is always unset
+					a_ChunkInterface.SetBlockMeta(a_BlockX, a_BlockY, a_BlockZ, Meta & 0x0b);  // Clear the "occupied" bit of the bed's block
 				}
 			}
 		}
diff --git a/src/Blocks/BlockBed.h b/src/Blocks/BlockBed.h
index a8b5be899..5b746110a 100644
--- a/src/Blocks/BlockBed.h
+++ b/src/Blocks/BlockBed.h
@@ -23,7 +23,6 @@ public:
 	}
 
 
-	virtual void OnPlacedByPlayer(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, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta) override;
 	virtual void OnDestroyed(cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface, int a_BlockX, int a_BlockY, int a_BlockZ) override;
 	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;
 
diff --git a/src/Blocks/BlockBigFlower.h b/src/Blocks/BlockBigFlower.h
index 3577bdd40..5240ddf53 100644
--- a/src/Blocks/BlockBigFlower.h
+++ b/src/Blocks/BlockBigFlower.h
@@ -85,18 +85,6 @@ public:
 	}
 
 
-	virtual void OnPlacedByPlayer(
-		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,
-		BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta
-	) override
-	{
-		int Meta = (((int)floor(a_Player->GetYaw() * 4.0 / 360.0 + 0.5) & 0x3) + 2) % 4;
-		a_ChunkInterface.FastSetBlock(a_BlockX, a_BlockY + 1, a_BlockZ, m_BlockType, 0x8 | Meta);
-	}
-
-
 	virtual void OnDestroyed(cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface, int a_BlockX, int a_BlockY, int a_BlockZ) override
 	{
 		NIBBLETYPE OldMeta = a_ChunkInterface.GetBlockMeta(a_BlockX, a_BlockY, a_BlockZ);
diff --git a/src/Blocks/BlockChest.h b/src/Blocks/BlockChest.h
index 201f2309b..01fec7f8b 100644
--- a/src/Blocks/BlockChest.h
+++ b/src/Blocks/BlockChest.h
@@ -62,50 +62,11 @@ public:
 		}
 		
 		// Single chest, get meta from rotation only
-		a_BlockMeta = RotationToMetaData(yaw);
+		a_BlockMeta = PlayerYawToMetaData(yaw);
 		return true;
 	}
 	
 
-	virtual void OnPlacedByPlayer(
-		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,
-		BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta
-	) override
-	{
-		// Check if this forms a doublechest, if so, need to adjust the meta:
-		cBlockArea Area;
-		if (!Area.Read(&a_ChunkInterface, a_BlockX - 1, a_BlockX + 1, a_BlockY, a_BlockY, a_BlockZ - 1, a_BlockZ + 1))
-		{
-			return;
-		}
-		
-		double rot = a_Player->GetYaw();  // FIXME: Rename rot to yaw
-		// Choose meta from player rotation, choose only between 2 or 3
-		NIBBLETYPE NewMeta = ((rot >= -90) && (rot < 90)) ? 2 : 3;
-		if (
-			CheckAndAdjustNeighbor(a_ChunkInterface, Area, 0, 1, NewMeta) ||
-			CheckAndAdjustNeighbor(a_ChunkInterface, Area, 2, 1, NewMeta)
-		)
-		{
-			// Forming a double chest in the X direction
-			return;
-		}
-		// Choose meta from player rotation, choose only between 4 or 5
-		NewMeta = (rot < 0) ? 4 : 5;
-		if (
-			CheckAndAdjustNeighbor(a_ChunkInterface, Area, 1, 0, NewMeta) ||
-			CheckAndAdjustNeighbor(a_ChunkInterface, Area, 2, 2, NewMeta)
-		)
-		{
-			// Forming a double chest in the Z direction
-			return;
-		}
-		
-		// Single chest, no further processing needed
-	}
-	
 	virtual bool CanBeAt(cChunkInterface & a_ChunkInterface, int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override
 	{
 		int BlockX = a_RelX + a_Chunk.GetPosX() * cChunkDef::Width;
@@ -180,30 +141,30 @@ public:
 	}
 	
 	
-	/// Translates player rotation when placing a chest into the chest block metadata. Valid for single chests only
-	static NIBBLETYPE RotationToMetaData(double a_Rotation)
+	/** Translates player yaw when placing a chest into the chest block metadata. Valid for single chests only */
+	static NIBBLETYPE PlayerYawToMetaData(double a_Yaw)
 	{
-		a_Rotation += 90 + 45;  // So its not aligned with axis
+		a_Yaw += 90 + 45;  // So its not aligned with axis
 
-		if (a_Rotation > 360.f)
+		if (a_Yaw > 360.f)
 		{
-			a_Rotation -= 360.f;
+			a_Yaw -= 360.f;
 		}
-		if ((a_Rotation >= 0.f) && (a_Rotation < 90.f))
+		if ((a_Yaw >= 0.f) && (a_Yaw < 90.f))
 		{
-			return 0x4;
+			return 0x04;
 		}
-		else if ((a_Rotation >= 180) && (a_Rotation < 270))
+		else if ((a_Yaw >= 180) && (a_Yaw < 270))
 		{
-			return 0x5;
+			return 0x05;
 		}
-		else if ((a_Rotation >= 90) && (a_Rotation < 180))
+		else if ((a_Yaw >= 90) && (a_Yaw < 180))
 		{
-			return 0x2;
+			return 0x02;
 		}
 		else
 		{
-			return 0x3;
+			return 0x03;
 		}
 	}
 	
diff --git a/src/Blocks/BlockDoor.cpp b/src/Blocks/BlockDoor.cpp
index 90b7b15c2..d2bf180be 100644
--- a/src/Blocks/BlockDoor.cpp
+++ b/src/Blocks/BlockDoor.cpp
@@ -23,7 +23,7 @@ void cBlockDoorHandler::OnDestroyed(cChunkInterface & a_ChunkInterface, cWorldIn
 	if (OldMeta & 8)
 	{
 		// Was upper part of door
-		if (IsDoor(a_ChunkInterface.GetBlock(a_BlockX, a_BlockY - 1, a_BlockZ)))
+		if (IsDoorBlockType(a_ChunkInterface.GetBlock(a_BlockX, a_BlockY - 1, a_BlockZ)))
 		{
 			a_ChunkInterface.FastSetBlock(a_BlockX, a_BlockY - 1, a_BlockZ, E_BLOCK_AIR, 0);
 		}
@@ -31,7 +31,7 @@ void cBlockDoorHandler::OnDestroyed(cChunkInterface & a_ChunkInterface, cWorldIn
 	else
 	{
 		// Was lower part
-		if (IsDoor(a_ChunkInterface.GetBlock(a_BlockX, a_BlockY + 1, a_BlockZ)))
+		if (IsDoorBlockType(a_ChunkInterface.GetBlock(a_BlockX, a_BlockY + 1, a_BlockZ)))
 		{
 			a_ChunkInterface.FastSetBlock(a_BlockX, a_BlockY + 1, a_BlockZ, E_BLOCK_AIR, 0);
 		}
@@ -84,52 +84,34 @@ void cBlockDoorHandler::OnCancelRightClick(cChunkInterface & a_ChunkInterface, c
 
 
 
-void cBlockDoorHandler::OnPlacedByPlayer(
-	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,
-	BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta
-)
-{
-	NIBBLETYPE a_TopBlockMeta = 8;
-	if (
-		((a_BlockMeta == 0) && (a_ChunkInterface.GetBlock(a_BlockX, a_BlockY, a_BlockZ - 1) == m_BlockType)) ||
-		((a_BlockMeta == 1) && (a_ChunkInterface.GetBlock(a_BlockX + 1, a_BlockY, a_BlockZ) == m_BlockType)) ||
-		((a_BlockMeta == 2) && (a_ChunkInterface.GetBlock(a_BlockX, a_BlockY, a_BlockZ + 1) == m_BlockType)) ||
-		((a_BlockMeta == 3) && (a_ChunkInterface.GetBlock(a_BlockX - 1, a_BlockY, a_BlockZ) == m_BlockType))
-	)
-	{
-		a_TopBlockMeta = 9;
-	}
-	a_ChunkInterface.SetBlock(a_BlockX, a_BlockY + 1, a_BlockZ, m_BlockType, a_TopBlockMeta);
-}
-
-
-
-
-
 NIBBLETYPE cBlockDoorHandler::MetaRotateCCW(NIBBLETYPE a_Meta)
 {
 	if (a_Meta & 0x08)
 	{
+		// The meta doesn't change for the top block
 		return a_Meta;
 	}
 	else
 	{
+		// Rotate the bottom block
 		return super::MetaRotateCCW(a_Meta);
 	}
 }
 
 
 
+
+
 NIBBLETYPE cBlockDoorHandler::MetaRotateCW(NIBBLETYPE a_Meta)
 {
 	if (a_Meta & 0x08)
 	{
+		// The meta doesn't change for the top block
 		return a_Meta;
 	}
 	else
 	{
+		// Rotate the bottom block
 		return super::MetaRotateCW(a_Meta);
 	}
 }
@@ -138,8 +120,10 @@ NIBBLETYPE cBlockDoorHandler::MetaRotateCW(NIBBLETYPE a_Meta)
 
 NIBBLETYPE cBlockDoorHandler::MetaMirrorXY(NIBBLETYPE a_Meta)
 {
-	// Top bit (0x08) contains door panel type (Top/Bottom panel)  Only Bottom panels contain position data
-	// Return a_Meta if panel is a top panel (0x08 bit is set to 1)
+	/*
+	Top bit (0x08) contains door block position (Top / Bottom). Only Bottom blocks contain position data
+	Return a_Meta if panel is a top panel (0x08 bit is set to 1)
+	*/
 
 	// Note: Currently, you can not properly mirror the hinges on a double door.  The orientation of the door is stored
 	// in only the bottom tile while the hinge position is in the top tile.  This function only operates on one tile at a time,
diff --git a/src/Blocks/BlockDoor.h b/src/Blocks/BlockDoor.h
index 92ad8da12..334519077 100644
--- a/src/Blocks/BlockDoor.h
+++ b/src/Blocks/BlockDoor.h
@@ -101,14 +101,6 @@ public:
 	}
 
 
-	virtual void OnPlacedByPlayer(
-		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,
-		BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta
-	) override;
-
-
 	virtual bool IsUseable(void) override
 	{
 		return true;
@@ -117,11 +109,19 @@ public:
 
 	virtual bool CanBeAt(cChunkInterface & a_ChunkInterface, int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override
 	{
-		return ((a_RelY > 0) && (a_Chunk.GetBlock(a_RelX, a_RelY - 1, a_RelZ) != E_BLOCK_AIR));
+		return ((a_RelY > 0) && CanBeOn(a_Chunk.GetBlock(a_RelX, a_RelY - 1, a_RelZ)));
+	}
+
+
+	/** Returns true if door can be placed on the specified block type. */
+	static bool CanBeOn(BLOCKTYPE a_BlockType)
+	{
+		// Vanilla refuses to place doors on transparent blocks
+		return !cBlockInfo::IsTransparent(a_BlockType);
 	}
 
 
-	bool CanReplaceBlock(BLOCKTYPE a_BlockType)
+	static bool CanReplaceBlock(BLOCKTYPE a_BlockType)
 	{
 		switch (a_BlockType)
 		{
@@ -170,8 +170,21 @@ public:
 	}
 
 
+	/** Returns a vector pointing one block in the direction the door is facing (where the outside is). */
+	inline static Vector3i GetRelativeDirectionToOutside(NIBBLETYPE a_BlockMeta)
+	{
+		switch (a_BlockMeta & 0x03)
+		{
+			case 0:  return Vector3i(-1, 0,  0);  // Facing West  / XM
+			case 1:  return Vector3i( 0, 0, -1);  // Facing North / ZM
+			case 2:  return Vector3i( 1, 0,  0);  // Facing East  / XP
+			default: return Vector3i( 0, 0,  1);  // Facing South / ZP
+		}
+	}
+
+
 	/** Returns true if the specified blocktype is any kind of door */
-	inline static bool IsDoor(BLOCKTYPE a_Block)
+	inline static bool IsDoorBlockType(BLOCKTYPE a_Block)
 	{
 		switch (a_Block)
 		{
@@ -193,6 +206,8 @@ public:
 	}
 
 
+	/** Returns true iff the door at the specified coords is open.
+	The coords may point to either the top part or the bottom part of the door. */
 	static NIBBLETYPE IsOpen(cChunkInterface & a_ChunkInterface, int a_BlockX, int a_BlockY, int a_BlockZ)
 	{
 		NIBBLETYPE Meta = GetCompleteDoorMeta(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ);
@@ -237,7 +252,7 @@ public:
 	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))
+		if (!IsDoorBlockType(Block))
 		{
 			return;
 		}
diff --git a/src/Blocks/BlockHandler.cpp b/src/Blocks/BlockHandler.cpp
index d532aa1dc..2de4a3e4c 100644
--- a/src/Blocks/BlockHandler.cpp
+++ b/src/Blocks/BlockHandler.cpp
@@ -369,7 +369,7 @@ void cBlockHandler::OnUpdate(cChunkInterface & cChunkInterface, cWorldInterface
 
 
 
-void cBlockHandler::OnPlacedByPlayer(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, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)
+void cBlockHandler::OnPlacedByPlayer(cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface, cPlayer * a_Player, const sSetBlock & a_BlockChange)
 {
 }
 
diff --git a/src/Blocks/BlockHandler.h b/src/Blocks/BlockHandler.h
index f2298afb5..4dec0dc95 100644
--- a/src/Blocks/BlockHandler.h
+++ b/src/Blocks/BlockHandler.h
@@ -42,15 +42,12 @@ public:
 		BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
 	);
 
-	/// Called by cWorld::SetBlock() after the block has been set
+	/** Called by cWorld::SetBlock() after the block has been set */
 	virtual void OnPlaced(cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface, int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta);
 	
-	/// Called by cClientHandle::HandlePlaceBlock() after the player has placed a new block. Called after OnPlaced().
+	/** Called by cPlayer::PlaceBlocks() for each block after it has been set to the world. Called after OnPlaced(). */
 	virtual void OnPlacedByPlayer(
-		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,
-		BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta
+		cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface, cPlayer * a_Player, const sSetBlock & a_BlockChange
 	);
 	
 	/// Called before the player has destroyed a block
@@ -96,7 +93,8 @@ public:
 	*/
 	// virtual bool CanBePlacedAt(cWorld * a_World, int a_BlockX, int a_BlockY, int a_BlockZ, char a_Dir);
 		
-	/// Called to check whether this block supports a rclk action. If it returns true, OnUse() is called
+	/** Called to check whether this block supports a rclk action.
+	If it returns true, OnUse() is called */
 	virtual bool IsUseable(void);
 	
 	/** Indicates whether the client will click through this block.
@@ -109,20 +107,21 @@ public:
 	*/
 	virtual bool DoesIgnoreBuildCollision(void);
 
-	/// <summary>Similar to DoesIgnoreBuildCollision(void), but is used for cases where block meta/player item-in-hand is needed to determine collision (thin snow)</summary>
+	/** Similar to DoesIgnoreBuildCollision(void), but is used for cases where block's meta or
+	player's item-in-hand is needed to determine collision (thin snow) */
 	virtual bool DoesIgnoreBuildCollision(cPlayer *, NIBBLETYPE a_Meta)
 	{
 		UNUSED(a_Meta);
 		return DoesIgnoreBuildCollision();
 	}
 
-	/// <summary>Returns if this block drops if it gets destroyed by an unsuitable situation. Default: true</summary>
+	/** Returns if this block drops if it gets destroyed by an unsuitable situation.
+	Default: true */
 	virtual bool DoesDropOnUnsuitable(void);
 	
 	/** Called when one of the neighbors gets set; equivalent to MC block update.
 	By default drops if position no more suitable (CanBeAt(), DoesDropOnUnsuitable(), Drop()),
-	and wakes up all simulators on the block.
-	*/
+	and wakes up all simulators on the block. */
 	virtual void Check(cChunkInterface & ChunkInterface, cBlockPluginInterface & a_PluginInterface, int a_RelX, int a_RelY, int a_RelZ, cChunk & a_Chunk);
 	
 	/// <summary>Rotates a given block meta counter-clockwise. Default: no change</summary>
diff --git a/src/Blocks/BlockMobHead.h b/src/Blocks/BlockMobHead.h
index e21e42334..cb8143749 100644
--- a/src/Blocks/BlockMobHead.h
+++ b/src/Blocks/BlockMobHead.h
@@ -12,16 +12,18 @@ class cBlockMobHeadHandler :
 	public cBlockEntityHandler
 {
 public:
-	cBlockMobHeadHandler(BLOCKTYPE a_BlockType)
-		: cBlockEntityHandler(a_BlockType)
+	cBlockMobHeadHandler(BLOCKTYPE a_BlockType):
+		cBlockEntityHandler(a_BlockType)
 	{
 	}
 	
+
 	virtual void ConvertToPickups(cItems & a_Pickups, NIBBLETYPE a_BlockMeta) override
 	{
-		// The drop spawn is in OnDestroyed method
+		// The drop spawn is in the OnDestroyedByPlayer method
 	}
 	
+
 	virtual void OnDestroyedByPlayer(cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface, cPlayer * a_Player, int a_BlockX, int a_BlockY, int a_BlockZ) override
 	{
 		if (a_Player->IsGameModeCreative())
@@ -61,202 +63,6 @@ public:
 		
 		a_WorldInterface.DoWithBlockEntityAt(a_BlockX, a_BlockY, a_BlockZ, Callback);
 	}
-
-	bool TrySpawnWither(cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface, int a_BlockX, int a_BlockY, int a_BlockZ)
-	{
-		if (a_BlockY < 2)
-		{
-			return false;
-		}
-
-		class cCallback : public cBlockEntityCallback
-		{
-			bool m_IsWither;
-			
-			virtual bool Item(cBlockEntity * a_BlockEntity)
-			{
-				if (a_BlockEntity->GetBlockType() != E_BLOCK_HEAD)
-				{
-					return false;
-				}
-				cMobHeadEntity * MobHeadEntity = static_cast<cMobHeadEntity*>(a_BlockEntity);
-
-				m_IsWither = (MobHeadEntity->GetType() == SKULL_TYPE_WITHER);
-				return false;
-			}
-		
-		public:
-			cCallback () : m_IsWither(false) {}
-
-			bool IsWither(void) const { return m_IsWither; }
-
-			void Reset(void) { m_IsWither = false; }
-
-		} CallbackA, CallbackB;
-
-		class cPlayerCallback : public cPlayerListCallback
-		{
-			Vector3f m_Pos;
-
-			virtual bool Item(cPlayer * a_Player)
-			{
-				// TODO 2014-05-21 xdot: Vanilla minecraft uses an AABB check instead of a radius one
-				double Dist = (a_Player->GetPosition() - m_Pos).Length();
-				if (Dist < 50.0)
-				{
-					// If player is close, award achievement
-					a_Player->AwardAchievement(achSpawnWither);
-				}
-				return false;
-			}
-
-		public:
-			cPlayerCallback(const Vector3f & a_Pos) : m_Pos(a_Pos) {}
-
-		} PlayerCallback(Vector3f((float)a_BlockX, (float)a_BlockY, (float)a_BlockZ));
-
-		a_WorldInterface.DoWithBlockEntityAt(a_BlockX, a_BlockY, a_BlockZ, CallbackA);
-
-		if (!CallbackA.IsWither())
-		{
-			return false;
-		}
-
-		CallbackA.Reset();
-		
-		BLOCKTYPE BlockY1 = a_ChunkInterface.GetBlock(a_BlockX, a_BlockY - 1, a_BlockZ);
-		BLOCKTYPE BlockY2 = a_ChunkInterface.GetBlock(a_BlockX, a_BlockY - 2, a_BlockZ);
-
-		if ((BlockY1 != E_BLOCK_SOULSAND) || (BlockY2 != E_BLOCK_SOULSAND))
-		{
-			return false;
-		}
-		
-		a_WorldInterface.DoWithBlockEntityAt(a_BlockX - 1, a_BlockY, a_BlockZ, CallbackA);
-		a_WorldInterface.DoWithBlockEntityAt(a_BlockX + 1, a_BlockY, a_BlockZ, CallbackB);
-
-		BLOCKTYPE Block1 = a_ChunkInterface.GetBlock(a_BlockX - 1, a_BlockY - 1, a_BlockZ);
-		BLOCKTYPE Block2 = a_ChunkInterface.GetBlock(a_BlockX + 1, a_BlockY - 1, a_BlockZ);
-
-		if ((Block1 == E_BLOCK_SOULSAND) && (Block2 == E_BLOCK_SOULSAND) && CallbackA.IsWither() && CallbackB.IsWither())
-		{
-			a_ChunkInterface.FastSetBlock(a_BlockX,     a_BlockY - 1, a_BlockZ, E_BLOCK_AIR, 0);
-			a_ChunkInterface.FastSetBlock(a_BlockX + 1, a_BlockY - 1, a_BlockZ, E_BLOCK_AIR, 0);
-			a_ChunkInterface.FastSetBlock(a_BlockX - 1, a_BlockY - 1, a_BlockZ, E_BLOCK_AIR, 0);
-			a_ChunkInterface.FastSetBlock(a_BlockX,     a_BlockY - 2, a_BlockZ, E_BLOCK_AIR, 0);
-
-			// Block entities
-			a_ChunkInterface.SetBlock(a_BlockX + 1, a_BlockY, a_BlockZ, E_BLOCK_AIR, 0);
-			a_ChunkInterface.SetBlock(a_BlockX,     a_BlockY, a_BlockZ, E_BLOCK_AIR, 0);
-			a_ChunkInterface.SetBlock(a_BlockX - 1, a_BlockY, a_BlockZ, E_BLOCK_AIR, 0);
-
-			// Spawn the wither:
-			a_WorldInterface.SpawnMob(a_BlockX + 0.5, a_BlockY - 2, a_BlockZ + 0.5, mtWither);
-
-			// Award Achievement
-			a_WorldInterface.ForEachPlayer(PlayerCallback);
-
-			return true;
-		}
-
-		CallbackA.Reset();
-		CallbackB.Reset();
-		
-		a_WorldInterface.DoWithBlockEntityAt(a_BlockX, a_BlockY, a_BlockZ - 1, CallbackA);
-		a_WorldInterface.DoWithBlockEntityAt(a_BlockX, a_BlockY, a_BlockZ + 1, CallbackB);
-
-		Block1 = a_ChunkInterface.GetBlock(a_BlockX, a_BlockY - 1, a_BlockZ - 1);
-		Block2 = a_ChunkInterface.GetBlock(a_BlockX, a_BlockY - 1, a_BlockZ + 1);
-
-		if ((Block1 == E_BLOCK_SOULSAND) && (Block2 == E_BLOCK_SOULSAND) && CallbackA.IsWither() && CallbackB.IsWither())
-		{
-			a_ChunkInterface.FastSetBlock(a_BlockX, a_BlockY - 1, a_BlockZ,     E_BLOCK_AIR, 0);
-			a_ChunkInterface.FastSetBlock(a_BlockX, a_BlockY - 1, a_BlockZ + 1, E_BLOCK_AIR, 0);
-			a_ChunkInterface.FastSetBlock(a_BlockX, a_BlockY - 1, a_BlockZ - 1, E_BLOCK_AIR, 0);
-			a_ChunkInterface.FastSetBlock(a_BlockX, a_BlockY - 2, a_BlockZ,     E_BLOCK_AIR, 0);
-
-			// Block entities
-			a_ChunkInterface.SetBlock(a_BlockX, a_BlockY, a_BlockZ + 1, E_BLOCK_AIR, 0);
-			a_ChunkInterface.SetBlock(a_BlockX, a_BlockY, a_BlockZ,     E_BLOCK_AIR, 0);
-			a_ChunkInterface.SetBlock(a_BlockX, a_BlockY, a_BlockZ - 1, E_BLOCK_AIR, 0);
-
-			// Spawn the wither:
-			a_WorldInterface.SpawnMob(a_BlockX + 0.5, a_BlockY - 2, a_BlockZ + 0.5, mtWither);
-
-			// Award Achievement
-			a_WorldInterface.ForEachPlayer(PlayerCallback);
-
-			return true;
-		}
-
-		return false;
-	}
-	
-	virtual void OnPlacedByPlayer(
-		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,
-		BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta
-	) override
-	{
-		class cCallback : public cBlockEntityCallback
-		{
-			cPlayer * m_Player;
-			NIBBLETYPE m_OldBlockMeta;
-			NIBBLETYPE m_NewBlockMeta;
-			
-			virtual bool Item(cBlockEntity * a_BlockEntity)
-			{
-				if (a_BlockEntity->GetBlockType() != E_BLOCK_HEAD)
-				{
-					return false;
-				}
-				cMobHeadEntity * MobHeadEntity = static_cast<cMobHeadEntity*>(a_BlockEntity);
-
-				int Rotation = 0;
-				if (m_NewBlockMeta == 1)
-				{
-					Rotation = (int) floor(m_Player->GetYaw() * 16.0F / 360.0F + 0.5) & 0xF;
-				}
-
-				MobHeadEntity->SetType(static_cast<eMobHeadType>(m_OldBlockMeta));
-				MobHeadEntity->SetRotation(static_cast<eMobHeadRotation>(Rotation));
-				MobHeadEntity->GetWorld()->BroadcastBlockEntity(MobHeadEntity->GetPosX(), MobHeadEntity->GetPosY(), MobHeadEntity->GetPosZ());
-				return false;
-			}
-		
-		public:
-			cCallback (cPlayer * a_CBPlayer, NIBBLETYPE a_OldBlockMeta, NIBBLETYPE a_NewBlockMeta) :
-				m_Player(a_CBPlayer),
-				m_OldBlockMeta(a_OldBlockMeta),
-				m_NewBlockMeta(a_NewBlockMeta)
-			{}
-		};
-		cCallback Callback(a_Player, a_BlockMeta, static_cast<NIBBLETYPE>(a_BlockFace));
-		
-		a_BlockMeta = (NIBBLETYPE)a_BlockFace;
-		a_WorldInterface.DoWithBlockEntityAt(a_BlockX, a_BlockY, a_BlockZ, Callback);
-		a_ChunkInterface.SetBlockMeta(a_BlockX, a_BlockY, a_BlockZ, a_BlockMeta);
-
-		if (a_BlockMeta == SKULL_TYPE_WITHER)
-		{
-			static const Vector3i Coords[] =
-			{
-				Vector3i( 0, 0,  0),
-				Vector3i( 1, 0,  0),
-				Vector3i(-1, 0,  0),
-				Vector3i( 0, 0,  1),
-				Vector3i( 0, 0, -1),
-			};
-			for (size_t i = 0; i < ARRAYCOUNT(Coords); ++i)
-			{
-				if (TrySpawnWither(a_ChunkInterface, a_WorldInterface, a_BlockX + Coords[i].x, a_BlockY, a_BlockZ + Coords[i].z))
-				{
-					break;
-				}
-			}  // for i - Coords[]
-		}
-	}
 } ;
 
 
diff --git a/src/Blocks/BlockPumpkin.h b/src/Blocks/BlockPumpkin.h
index 275d1422a..af00fbe8e 100644
--- a/src/Blocks/BlockPumpkin.h
+++ b/src/Blocks/BlockPumpkin.h
@@ -17,70 +17,6 @@ public:
 	}
 
 	
-	virtual void OnPlacedByPlayer(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, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta) override
-	{
-		// Check whether the pumpkin is a part of a golem or a snowman
-		
-		if (a_BlockY < 2)
-		{
-			// The pumpkin is too low for a golem / snowman
-			return;
-		}
-		
-		BLOCKTYPE BlockY1 = a_ChunkInterface.GetBlock(a_BlockX, a_BlockY - 1, a_BlockZ);
-		BLOCKTYPE BlockY2 = a_ChunkInterface.GetBlock(a_BlockX, a_BlockY - 2, a_BlockZ);
-		
-		// Check for a snow golem:
-		if ((BlockY1 == E_BLOCK_SNOW_BLOCK) && (BlockY2 == E_BLOCK_SNOW_BLOCK))
-		{
-			a_ChunkInterface.FastSetBlock(a_BlockX, a_BlockY,     a_BlockZ, E_BLOCK_AIR, 0);
-			a_ChunkInterface.FastSetBlock(a_BlockX, a_BlockY - 1, a_BlockZ, E_BLOCK_AIR, 0);
-			a_ChunkInterface.FastSetBlock(a_BlockX, a_BlockY - 2, a_BlockZ, E_BLOCK_AIR, 0);
-			a_WorldInterface.SpawnMob(a_BlockX + 0.5, a_BlockY - 2, a_BlockZ + 0.5, mtSnowGolem);
-			return;
-		}
-		
-		// Check for an iron golem. First check only the body and legs, since those are the same for both orientations:
-		if ((BlockY1 != E_BLOCK_IRON_BLOCK) || (BlockY2 != E_BLOCK_IRON_BLOCK))
-		{
-			// One of the blocks is not an iron, no chance of a golem here
-			return;
-		}
-		
-		// Now check both orientations for hands:
-		if (
-			(a_ChunkInterface.GetBlock(a_BlockX + 1, a_BlockY - 1, a_BlockZ) == E_BLOCK_IRON_BLOCK) &&
-			(a_ChunkInterface.GetBlock(a_BlockX - 1, a_BlockY - 1, a_BlockZ) == E_BLOCK_IRON_BLOCK)
-		)
-		{
-			// Remove the iron blocks:
-			a_ChunkInterface.FastSetBlock(a_BlockX,     a_BlockY,     a_BlockZ, E_BLOCK_AIR, 0);
-			a_ChunkInterface.FastSetBlock(a_BlockX,     a_BlockY - 1, a_BlockZ, E_BLOCK_AIR, 0);
-			a_ChunkInterface.FastSetBlock(a_BlockX + 1, a_BlockY - 1, a_BlockZ, E_BLOCK_AIR, 0);
-			a_ChunkInterface.FastSetBlock(a_BlockX - 1, a_BlockY - 1, a_BlockZ, E_BLOCK_AIR, 0);
-			a_ChunkInterface.FastSetBlock(a_BlockX,     a_BlockY - 2, a_BlockZ, E_BLOCK_AIR, 0);
-			
-			// Spawn the golem:
-			a_WorldInterface.SpawnMob(a_BlockX + 0.5, a_BlockY - 2, a_BlockZ + 0.5, mtIronGolem);
-		}
-		else if (
-			(a_ChunkInterface.GetBlock(a_BlockX, a_BlockY - 1, a_BlockZ + 1) == E_BLOCK_IRON_BLOCK) &&
-			(a_ChunkInterface.GetBlock(a_BlockX, a_BlockY - 1, a_BlockZ - 1) == E_BLOCK_IRON_BLOCK)
-		)
-		{
-			// Remove the iron blocks:
-			a_ChunkInterface.FastSetBlock(a_BlockX, a_BlockY,     a_BlockZ,     E_BLOCK_AIR, 0);
-			a_ChunkInterface.FastSetBlock(a_BlockX, a_BlockY - 1, a_BlockZ,     E_BLOCK_AIR, 0);
-			a_ChunkInterface.FastSetBlock(a_BlockX, a_BlockY - 1, a_BlockZ + 1, E_BLOCK_AIR, 0);
-			a_ChunkInterface.FastSetBlock(a_BlockX, a_BlockY - 1, a_BlockZ - 1, E_BLOCK_AIR, 0);
-			a_ChunkInterface.FastSetBlock(a_BlockX, a_BlockY - 2, a_BlockZ,     E_BLOCK_AIR, 0);
-			
-			// Spawn the golem:
-			a_WorldInterface.SpawnMob(a_BlockX + 0.5, a_BlockY - 2, a_BlockZ + 0.5, mtIronGolem);
-		}
-	}
-
-
 	virtual bool GetPlacementBlockTypeMeta(
 		cChunkInterface & a_ChunkInterface, cPlayer * a_Player,
 		int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace,
diff --git a/src/Blocks/BlockSignPost.h b/src/Blocks/BlockSignPost.h
index d97501651..99c000633 100644
--- a/src/Blocks/BlockSignPost.h
+++ b/src/Blocks/BlockSignPost.h
@@ -53,17 +53,6 @@ public:
 	}
 
 
-	virtual void OnPlacedByPlayer(
-		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,
-		BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta
-	) override
-	{
-		a_Player->GetClientHandle()->SendEditSign(a_BlockX, a_BlockY, a_BlockZ);
-	}
-
-
 	virtual NIBBLETYPE MetaRotateCW(NIBBLETYPE a_Meta) override
 	{
 		return (a_Meta + 4) & 0x0f;
diff --git a/src/Blocks/BlockWallSign.h b/src/Blocks/BlockWallSign.h
index 0abe9c52c..b6599d033 100644
--- a/src/Blocks/BlockWallSign.h
+++ b/src/Blocks/BlockWallSign.h
@@ -27,17 +27,6 @@ public:
 	}
 
 
-	virtual void OnPlacedByPlayer(
-		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,
-		BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta
-	) override
-	{
-		a_Player->GetClientHandle()->SendEditSign(a_BlockX, a_BlockY, a_BlockZ);
-	}
-
-
 	virtual bool CanBeAt(cChunkInterface & a_ChunkInterface, int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override
 	{
 		int BlockX = (a_Chunk.GetPosX() * cChunkDef::Width) + a_RelX;
diff --git a/src/Chunk.cpp b/src/Chunk.cpp
index 555e85015..b06eed316 100644
--- a/src/Chunk.cpp
+++ b/src/Chunk.cpp
@@ -49,14 +49,14 @@
 ////////////////////////////////////////////////////////////////////////////////
 // sSetBlock:
 
-sSetBlock::sSetBlock( int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)  // absolute block position
-	: x( a_BlockX)
-	, y( a_BlockY)
-	, z( a_BlockZ)
-	, BlockType( a_BlockType)
-	, BlockMeta( a_BlockMeta)
-{
-	cChunkDef::AbsoluteToRelative(x, y, z, ChunkX, ChunkZ);
+sSetBlock::sSetBlock(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta):
+	m_RelX(a_BlockX),
+	m_RelY(a_BlockY),
+	m_RelZ(a_BlockZ),
+	m_BlockType(a_BlockType),
+	m_BlockMeta(a_BlockMeta)
+{
+	cChunkDef::AbsoluteToRelative(m_RelX, m_RelY, m_RelZ, m_ChunkX, m_ChunkZ);
 }
 
 
diff --git a/src/ChunkDef.h b/src/ChunkDef.h
index 8f1d416ad..2bfa2949c 100644
--- a/src/ChunkDef.h
+++ b/src/ChunkDef.h
@@ -347,18 +347,32 @@ public:
 
 struct sSetBlock
 {
-	int x, y, z;
-	int ChunkX, ChunkZ;
-	BLOCKTYPE BlockType;
-	NIBBLETYPE BlockMeta;
-
-	sSetBlock( int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta);  // absolute block position
-	sSetBlock(int a_ChunkX, int a_ChunkZ, int a_X, int a_Y, int a_Z, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta) :
-		x(a_X), y(a_Y), z(a_Z),
-		ChunkX(a_ChunkX), ChunkZ(a_ChunkZ),
-		BlockType(a_BlockType),
-		BlockMeta(a_BlockMeta)
-	{}
+	int m_RelX, m_RelY, m_RelZ;
+	int m_ChunkX, m_ChunkZ;
+	BLOCKTYPE m_BlockType;
+	NIBBLETYPE m_BlockMeta;
+
+	sSetBlock(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta);
+
+	sSetBlock(int a_ChunkX, int a_ChunkZ, int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta) :
+		m_RelX(a_RelX), m_RelY(a_RelY), m_RelZ(a_RelZ),
+		m_ChunkX(a_ChunkX), m_ChunkZ(a_ChunkZ),
+		m_BlockType(a_BlockType),
+		m_BlockMeta(a_BlockMeta)
+	{
+		ASSERT((a_RelX >= 0) && (a_RelX < cChunkDef::Width));
+		ASSERT((a_RelZ >= 0) && (a_RelZ < cChunkDef::Width));
+	}
+
+	/** Returns the absolute X coord of the stored block. */
+	int GetX(void) const { return m_RelX + cChunkDef::Width * m_ChunkX; }
+
+	/** Returns the absolute Y coord of the stored block.
+	Is the same as relative Y coords, because there's no Y relativization. */
+	int GetY(void) const { return m_RelY; }
+
+	/** Returns the absolute Z coord of the stored block. */
+	int GetZ(void) const { return m_RelZ + cChunkDef::Width * m_ChunkZ; }
 };
 
 typedef std::list<sSetBlock> sSetBlockList;
@@ -385,6 +399,17 @@ public:
 typedef std::list<cChunkCoords> cChunkCoordsList;
 typedef std::vector<cChunkCoords> cChunkCoordsVector;
 
+/** A simple hash function for chunk coords, we assume that chunk coords won't use more than 16 bits, so the hash is almost an identity.
+Used for std::unordered_map<cChunkCoords, ...> */
+class cChunkCoordsHash
+{
+public:
+	size_t operator () (const cChunkCoords & a_Coords) const
+	{
+		return (static_cast<size_t>(a_Coords.m_ChunkX) << 16) ^ static_cast<size_t>(a_Coords.m_ChunkZ);
+	}
+};
+
 
 
 
diff --git a/src/ChunkMap.cpp b/src/ChunkMap.cpp
index 6aff3a754..c8f5aa673 100644
--- a/src/ChunkMap.cpp
+++ b/src/ChunkMap.cpp
@@ -1101,17 +1101,17 @@ void cChunkMap::FastSetBlocks(sSetBlockList & a_BlockList)
 	// Process all items from a_BlockList, either successfully or by placing into Failed
 	while (!a_BlockList.empty())
 	{
-		int ChunkX = a_BlockList.front().ChunkX;
-		int ChunkZ = a_BlockList.front().ChunkZ;
+		int ChunkX = a_BlockList.front().m_ChunkX;
+		int ChunkZ = a_BlockList.front().m_ChunkZ;
 		cCSLock Lock(m_CSLayers);
 		cChunkPtr Chunk = GetChunkNoGen(ChunkX, ChunkZ);
 		if ((Chunk != nullptr) && Chunk->IsValid())
 		{
 			for (sSetBlockList::iterator itr = a_BlockList.begin(); itr != a_BlockList.end();)
 			{
-				if ((itr->ChunkX == ChunkX) && (itr->ChunkZ == ChunkZ))
+				if ((itr->m_ChunkX == ChunkX) && (itr->m_ChunkZ == ChunkZ))
 				{
-					Chunk->FastSetBlock(itr->x, itr->y, itr->z, itr->BlockType, itr->BlockMeta);
+					Chunk->FastSetBlock(itr->m_RelX, itr->m_RelY, itr->m_RelZ, itr->m_BlockType, itr->m_BlockMeta);
 					itr = a_BlockList.erase(itr);
 				}
 				else
@@ -1125,7 +1125,7 @@ void cChunkMap::FastSetBlocks(sSetBlockList & a_BlockList)
 			// The chunk is not valid, move all blocks within this chunk to Failed
 			for (sSetBlockList::iterator itr = a_BlockList.begin(); itr != a_BlockList.end();)
 			{
-				if ((itr->ChunkX == ChunkX) && (itr->ChunkZ == ChunkZ))
+				if ((itr->m_ChunkX == ChunkX) && (itr->m_ChunkZ == ChunkZ))
 				{
 					Failed.push_back(*itr);
 					itr = a_BlockList.erase(itr);
@@ -1146,6 +1146,34 @@ void cChunkMap::FastSetBlocks(sSetBlockList & a_BlockList)
 
 
 
+void cChunkMap::SetBlocks(const sSetBlockVector & a_Blocks)
+{
+	cCSLock lock(m_CSLayers);
+	cChunkPtr chunk = nullptr;
+	int lastChunkX = 0x7fffffff;  // Bogus coords so that chunk is updated on first pass
+	int lastChunkZ = 0x7fffffff;
+	for (auto block: a_Blocks)
+	{
+		// Update the chunk, if different from last time:
+		if ((block.m_ChunkX != lastChunkX) || (block.m_ChunkZ != lastChunkZ))
+		{
+			lastChunkX = block.m_ChunkX;
+			lastChunkZ = block.m_ChunkZ;
+			chunk = GetChunk(lastChunkX, lastChunkZ);
+		}
+
+		// If the chunk is valid, set the block:
+		if (chunk != nullptr)
+		{
+			chunk->SetBlock(block.m_RelX, block.m_RelY, block.m_RelZ, block.m_BlockType, block.m_BlockMeta);
+		}
+	}  // for block - a_Blocks[]
+}
+
+
+
+
+
 void cChunkMap::CollectPickupsByPlayer(cPlayer & a_Player)
 {
 	int BlockX = (int)(a_Player.GetPosX());  // Truncating doesn't matter much; we're scanning entire chunks anyway
@@ -1175,28 +1203,28 @@ void cChunkMap::CollectPickupsByPlayer(cPlayer & a_Player)
 
 BLOCKTYPE cChunkMap::GetBlock(int a_BlockX, int a_BlockY, int a_BlockZ)
 {
+	int X = a_BlockX, Y = a_BlockY, Z = a_BlockZ;
+	int ChunkX, ChunkZ;
+	cChunkDef::AbsoluteToRelative(X, Y, Z, ChunkX, ChunkZ);
+
 	// First check if it isn't queued in the m_FastSetBlockQueue:
 	{
-		int X = a_BlockX, Y = a_BlockY, Z = a_BlockZ;
-		int ChunkX, ChunkZ;
-		cChunkDef::AbsoluteToRelative(X, Y, Z, ChunkX, ChunkZ);
 		cCSLock Lock(m_CSFastSetBlock);
 		for (sSetBlockList::iterator itr = m_FastSetBlockQueue.begin(); itr != m_FastSetBlockQueue.end(); ++itr)
 		{
-			if ((itr->x == X) && (itr->y == Y) && (itr->z == Z) && (itr->ChunkX == ChunkX) && (itr->ChunkZ == ChunkZ))
+			if ((itr->m_RelX == X) && (itr->m_RelY == Y) && (itr->m_RelZ == Z) && (itr->m_ChunkX == ChunkX) && (itr->m_ChunkZ == ChunkZ))
 			{
-				return itr->BlockType;
+				return itr->m_BlockType;
 			}
 		}  // for itr - m_FastSetBlockQueue[]
 	}
-	int ChunkX, ChunkZ;
-	cChunkDef::AbsoluteToRelative(a_BlockX, a_BlockY, a_BlockZ, ChunkX, ChunkZ);
-	
+
+	// Not in the queue, query the chunk, if loaded:
 	cCSLock Lock(m_CSLayers);
 	cChunkPtr Chunk = GetChunk(ChunkX, ChunkZ);
 	if ((Chunk != nullptr) && Chunk->IsValid())
 	{
-		return Chunk->GetBlock(a_BlockX, a_BlockY, a_BlockZ);
+		return Chunk->GetBlock(X, Y, Z);
 	}
 	return 0;
 }
@@ -1207,25 +1235,28 @@ BLOCKTYPE cChunkMap::GetBlock(int a_BlockX, int a_BlockY, int a_BlockZ)
 
 NIBBLETYPE cChunkMap::GetBlockMeta(int a_BlockX, int a_BlockY, int a_BlockZ)
 {
+	int X = a_BlockX, Y = a_BlockY, Z = a_BlockZ;
+	int ChunkX, ChunkZ;
+	cChunkDef::AbsoluteToRelative(X, Y, Z, ChunkX, ChunkZ);
+
 	// First check if it isn't queued in the m_FastSetBlockQueue:
 	{
 		cCSLock Lock(m_CSFastSetBlock);
 		for (sSetBlockList::iterator itr = m_FastSetBlockQueue.begin(); itr != m_FastSetBlockQueue.end(); ++itr)
 		{
-			if ((itr->x == a_BlockX) && (itr->y == a_BlockY) && (itr->z == a_BlockZ))
+			if ((itr->m_RelX == X) && (itr->m_RelY == Y) && (itr->m_RelZ == Z) && (itr->m_ChunkX == ChunkX) && (itr->m_ChunkZ == ChunkZ))
 			{
-				return itr->BlockMeta;
+				return itr->m_BlockMeta;
 			}
 		}  // for itr - m_FastSetBlockQueue[]
 	}
-	int ChunkX, ChunkZ;
-	cChunkDef::AbsoluteToRelative(a_BlockX, a_BlockY, a_BlockZ, ChunkX, ChunkZ);
-	
+
+	// Not in the queue, query the chunk, if loaded:
 	cCSLock Lock(m_CSLayers);
-	cChunkPtr Chunk = GetChunk( ChunkX, ChunkZ);
+	cChunkPtr Chunk = GetChunk(ChunkX, ChunkZ);
 	if ((Chunk != nullptr) && Chunk->IsValid())
 	{
-		return Chunk->GetMeta(a_BlockX, a_BlockY, a_BlockZ);
+		return Chunk->GetMeta(X, Y, Z);
 	}
 	return 0;
 }
@@ -1373,14 +1404,14 @@ void cChunkMap::ReplaceBlocks(const sSetBlockVector & a_Blocks, BLOCKTYPE a_Filt
 	cCSLock Lock(m_CSLayers);
 	for (sSetBlockVector::const_iterator itr = a_Blocks.begin(); itr != a_Blocks.end(); ++itr)
 	{
-		cChunkPtr Chunk = GetChunk(itr->ChunkX, itr->ChunkZ);
+		cChunkPtr Chunk = GetChunk(itr->m_ChunkX, itr->m_ChunkZ);
 		if ((Chunk == nullptr) || !Chunk->IsValid())
 		{
 			continue;
 		}
-		if (Chunk->GetBlock(itr->x, itr->y, itr->z) == a_FilterBlockType)
+		if (Chunk->GetBlock(itr->m_RelX, itr->m_RelY, itr->m_RelZ) == a_FilterBlockType)
 		{
-			Chunk->SetBlock(itr->x, itr->y, itr->z, itr->BlockType, itr->BlockMeta);
+			Chunk->SetBlock(itr->m_RelX, itr->m_RelY, itr->m_RelZ, itr->m_BlockType, itr->m_BlockMeta);
 		}
 	}
 }
@@ -1394,24 +1425,24 @@ void cChunkMap::ReplaceTreeBlocks(const sSetBlockVector & a_Blocks)
 	cCSLock Lock(m_CSLayers);
 	for (sSetBlockVector::const_iterator itr = a_Blocks.begin(); itr != a_Blocks.end(); ++itr)
 	{
-		cChunkPtr Chunk = GetChunk(itr->ChunkX, itr->ChunkZ);
+		cChunkPtr Chunk = GetChunk(itr->m_ChunkX, itr->m_ChunkZ);
 		if ((Chunk == nullptr) || !Chunk->IsValid())
 		{
 			continue;
 		}
-		switch (Chunk->GetBlock(itr->x, itr->y, itr->z))
+		switch (Chunk->GetBlock(itr->m_RelX, itr->m_RelY, itr->m_RelZ))
 		{
 			CASE_TREE_OVERWRITTEN_BLOCKS:
 			{
-				Chunk->SetBlock(itr->x, itr->y, itr->z, itr->BlockType, itr->BlockMeta);
+				Chunk->SetBlock(itr->m_RelX, itr->m_RelY, itr->m_RelZ, itr->m_BlockType, itr->m_BlockMeta);
 				break;
 			}
 			case E_BLOCK_LEAVES:
 			case E_BLOCK_NEW_LEAVES:
 			{
-				if ((itr->BlockType == E_BLOCK_LOG) || (itr->BlockType == E_BLOCK_NEW_LOG))
+				if ((itr->m_BlockType == E_BLOCK_LOG) || (itr->m_BlockType == E_BLOCK_NEW_LOG))
 				{
-					Chunk->SetBlock(itr->x, itr->y, itr->z, itr->BlockType, itr->BlockMeta);
+					Chunk->SetBlock(itr->m_RelX, itr->m_RelY, itr->m_RelZ, itr->m_BlockType, itr->m_BlockMeta);
 				}
 				break;
 			}
@@ -1507,7 +1538,7 @@ bool cChunkMap::GetBlocks(sSetBlockVector & a_Blocks, bool a_ContinueOnFailure)
 	cCSLock Lock(m_CSLayers);
 	for (sSetBlockVector::iterator itr = a_Blocks.begin(); itr != a_Blocks.end(); ++itr)
 	{
-		cChunkPtr Chunk = GetChunk(itr->ChunkX, itr->ChunkZ);
+		cChunkPtr Chunk = GetChunk(itr->m_ChunkX, itr->m_ChunkZ);
 		if ((Chunk == nullptr) || !Chunk->IsValid())
 		{
 			if (!a_ContinueOnFailure)
@@ -1517,8 +1548,8 @@ bool cChunkMap::GetBlocks(sSetBlockVector & a_Blocks, bool a_ContinueOnFailure)
 			res = false;
 			continue;
 		}
-		itr->BlockType = Chunk->GetBlock(itr->x, itr->y, itr->z);
-		itr->BlockMeta = Chunk->GetMeta(itr->x, itr->y, itr->z);
+		itr->m_BlockType = Chunk->GetBlock(itr->m_RelX, itr->m_RelY, itr->m_RelZ);
+		itr->m_BlockMeta = Chunk->GetMeta(itr->m_RelX, itr->m_RelY, itr->m_RelZ);
 	}
 	return res;
 }
@@ -1527,11 +1558,11 @@ bool cChunkMap::GetBlocks(sSetBlockVector & a_Blocks, bool a_ContinueOnFailure)
 
 
 
-bool cChunkMap::DigBlock(int a_X, int a_Y, int a_Z)
+bool cChunkMap::DigBlock(int a_BlockX, int a_BlockY, int a_BlockZ)
 {
-	int PosX = a_X, PosY = a_Y, PosZ = a_Z, ChunkX, ChunkZ;
+	int PosX = a_BlockX, PosY = a_BlockY, PosZ = a_BlockZ, ChunkX, ChunkZ;
 
-	cChunkDef::AbsoluteToRelative( PosX, PosY, PosZ, ChunkX, ChunkZ);
+	cChunkDef::AbsoluteToRelative(PosX, PosY, PosZ, ChunkX, ChunkZ);
 
 	{
 		cCSLock Lock(m_CSLayers);
@@ -1542,7 +1573,7 @@ bool cChunkMap::DigBlock(int a_X, int a_Y, int a_Z)
 		}
 		
 		DestChunk->SetBlock(PosX, PosY, PosZ, E_BLOCK_AIR, 0);
-		m_World->GetSimulatorManager()->WakeUp(a_X, a_Y, a_Z, DestChunk);
+		m_World->GetSimulatorManager()->WakeUp(a_BlockX, a_BlockY, a_BlockZ, DestChunk);
 	}
 
 	return true;
diff --git a/src/ChunkMap.h b/src/ChunkMap.h
index 6a858b06d..fe0bb3733 100644
--- a/src/ChunkMap.h
+++ b/src/ChunkMap.h
@@ -143,7 +143,13 @@ public:
 	void FastSetBlock(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta);
 	
 	void FastSetQueuedBlocks();
-	void      FastSetBlocks      (sSetBlockList & a_BlockList);
+	void FastSetBlocks(sSetBlockList & a_BlockList);
+
+	/** Performs the specified single-block set operations simultaneously, as if SetBlock() was called for each item.
+	Is more efficient than calling SetBlock() multiple times.
+	If the chunk for any of the blocks is not loaded, the set operation is ignored silently. */
+	void SetBlocks(const sSetBlockVector & a_Blocks);
+
 	void      CollectPickupsByPlayer(cPlayer & a_Player);
 	
 	BLOCKTYPE  GetBlock          (int a_BlockX, int a_BlockY, int a_BlockZ);
@@ -173,11 +179,20 @@ public:
 	(Re)sends the chunks to their relevant clients if successful. */
 	bool SetAreaBiome(int a_MinX, int a_MaxX, int a_MinZ, int a_MaxZ, EMCSBiome a_Biome);
 	
-	/** Retrieves block types of the specified blocks. If a chunk is not loaded, doesn't modify the block. Returns true if all blocks were read. */
+	/** Retrieves block types and metas of the specified blocks.
+	If a chunk is not loaded, doesn't modify the block and consults a_ContinueOnFailure whether to process the rest of the array.
+	Returns true if all blocks were read, false if any one failed. */
 	bool GetBlocks(sSetBlockVector & a_Blocks, bool a_ContinueOnFailure);
 
-	bool DigBlock   (int a_X, int a_Y, int a_Z);
-	void SendBlockTo(int a_X, int a_Y, int a_Z, cPlayer * a_Player);
+	/** Removes the block at the specified coords and wakes up simulators.
+	Returns false if the chunk is not loaded (and the block is not dug).
+	Returns true if successful. */
+	bool DigBlock(int a_BlockX, int a_BlockY, int a_BlockZ);
+
+	/** Sends the block at the specified coords to the specified player.
+	Uses a blockchange packet to send the block.
+	If the relevant chunk isn't loaded, doesn't do anything. */
+	void SendBlockTo(int a_BlockX, int a_BlockY, int a_BlockZ, cPlayer * a_Player);
 	
 	/** Compares clients of two chunks, calls the callback accordingly */
 	void CompareChunkClients(int a_ChunkX1, int a_ChunkZ1, int a_ChunkX2, int a_ChunkZ2, cClientDiffCallback & a_Callback);
diff --git a/src/ClientHandle.cpp b/src/ClientHandle.cpp
index cb9d34c84..6fe6e99fa 100644
--- a/src/ClientHandle.cpp
+++ b/src/ClientHandle.cpp
@@ -1346,12 +1346,19 @@ void cClientHandle::HandleRightClick(int a_BlockX, int a_BlockY, int a_BlockZ, e
 	
 	if (ItemHandler->IsPlaceable() && (a_BlockFace != BLOCK_FACE_NONE))
 	{
-		HandlePlaceBlock(a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, a_CursorX, a_CursorY, a_CursorZ, *ItemHandler);
+		if (!ItemHandler->OnPlayerPlace(*World, *m_Player, Equipped, a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, a_CursorX, a_CursorY, a_CursorZ))
+		{
+			// Placement failed, bail out
+			return;
+		}
 	}
 	else if ((ItemHandler->IsFood() || ItemHandler->IsDrinkable(EquippedDamage)))
 	{
-		if ((m_Player->IsSatiated() || m_Player->IsGameModeCreative()) &&
-			ItemHandler->IsFood() && (Equipped.m_ItemType != E_ITEM_GOLDEN_APPLE))
+		if (
+			(m_Player->IsSatiated() || m_Player->IsGameModeCreative()) &&  // Only creative or hungry players can eat
+			ItemHandler->IsFood() &&
+			(Equipped.m_ItemType != E_ITEM_GOLDEN_APPLE)  // Golden apple is a special case, it is used instead of eaten
+		)
 		{
 			// The player is satiated or in creative, and trying to eat
 			return;
@@ -1379,151 +1386,6 @@ void cClientHandle::HandleRightClick(int a_BlockX, int a_BlockY, int a_BlockZ, e
 
 
 
-void cClientHandle::HandlePlaceBlock(int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace, int a_CursorX, int a_CursorY, int a_CursorZ, cItemHandler & a_ItemHandler)
-{
-	BLOCKTYPE EquippedBlock = (BLOCKTYPE)(m_Player->GetEquippedItem().m_ItemType);
-	if (a_BlockFace < 0)
-	{
-		// Clicked in air
-		return;
-	}
-	
-	cWorld * World = m_Player->GetWorld();
-
-	BLOCKTYPE ClickedBlock;
-	NIBBLETYPE ClickedBlockMeta;
-	NIBBLETYPE EquippedBlockDamage = (NIBBLETYPE)(m_Player->GetEquippedItem().m_ItemDamage);
-
-	if ((a_BlockY < 0) || (a_BlockY >= cChunkDef::Height))
-	{
-		// The block is being placed outside the world, ignore this packet altogether (#128)
-		return;
-	}
-	
-	World->GetBlockTypeMeta(a_BlockX, a_BlockY, a_BlockZ, ClickedBlock, ClickedBlockMeta);
-
-	// Special slab handling - placing a slab onto another slab produces a dblslab instead:
-	if (
-		cBlockSlabHandler::IsAnySlabType(ClickedBlock) &&               // Is there a slab already?
-		cBlockSlabHandler::IsAnySlabType(EquippedBlock) &&              // Is the player placing another slab?
-		((ClickedBlockMeta & 0x07) == EquippedBlockDamage) &&           // Is it the same slab type?
-		(
-			(a_BlockFace == BLOCK_FACE_TOP) ||                          // Clicking the top of a bottom slab
-			(a_BlockFace == BLOCK_FACE_BOTTOM)                          // Clicking the bottom of a top slab
-		)
-	)
-	{
-		// Coordinates at clicked block, which was an eligible slab, and either top or bottom faces were clicked
-		// If clicked top face and slab occupies the top voxel, we want a slab to be placed above it (therefore increment Y)
-		// Else if clicked bottom face and slab occupies the bottom voxel, decrement Y for the same reason
-		// Don't touch coordinates if anything else because a dblslab opportunity is present
-		if ((ClickedBlockMeta & 0x08) && (a_BlockFace == BLOCK_FACE_TOP))
-		{
-			++a_BlockY;
-		}
-		else if (!(ClickedBlockMeta & 0x08) && (a_BlockFace == BLOCK_FACE_BOTTOM))
-		{
-			--a_BlockY;
-		}
-		World->GetBlockTypeMeta(a_BlockX, a_BlockY, a_BlockZ, ClickedBlock, ClickedBlockMeta);
-	}
-	else
-	{
-		// Check if the block ignores build collision (water, grass etc.):
-		if (
-			BlockHandler(ClickedBlock)->DoesIgnoreBuildCollision() ||
-			BlockHandler(ClickedBlock)->DoesIgnoreBuildCollision(m_Player, ClickedBlockMeta)
-			)
-		{
-			cChunkInterface ChunkInterface(World->GetChunkMap());
-			BlockHandler(ClickedBlock)->OnDestroyedByPlayer(ChunkInterface, *World, m_Player, a_BlockX, a_BlockY, a_BlockZ);
-		}
-		else
-		{
-			AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, a_BlockFace);
-			
-			if ((a_BlockY < 0) || (a_BlockY >= cChunkDef::Height))
-			{
-				// The block is being placed outside the world, ignore this packet altogether (#128)
-				return;
-			}
-			
-			NIBBLETYPE PlaceMeta;
-			BLOCKTYPE PlaceBlock;
-			World->GetBlockTypeMeta(a_BlockX, a_BlockY, a_BlockZ, PlaceBlock, PlaceMeta);
-
-			// Clicked on side of block, make sure that placement won't be cancelled if there is a slab able to be double slabbed.
-			// No need to do combinability (dblslab) checks, client will do that here.
-			if (cBlockSlabHandler::IsAnySlabType(PlaceBlock))
-			{
-				// It's a slab, don't do checks and proceed to double-slabbing
-			}
-			else
-			{
-				if (
-					!BlockHandler(PlaceBlock)->DoesIgnoreBuildCollision() &&
-					!BlockHandler(PlaceBlock)->DoesIgnoreBuildCollision(m_Player, PlaceMeta)
-					)
-				{
-					// Tried to place a block *into* another?
-					// Happens when you place a block aiming at side of block with a torch on it or stem beside it
-					return;
-				}
-			}
-		}
-	}
-	
-	BLOCKTYPE BlockType;
-	NIBBLETYPE BlockMeta;
-	if (!a_ItemHandler.GetPlacementBlockTypeMeta(World, m_Player, a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, a_CursorX, a_CursorY, a_CursorZ, BlockType, BlockMeta))
-	{
-		// Handler refused the placement, send that information back to the client:
-		World->SendBlockTo(a_BlockX, a_BlockY, a_BlockZ, m_Player);
-		m_Player->GetInventory().SendEquippedSlot();
-		return;
-	}
-	
-	cBlockHandler * NewBlock = BlockHandler(BlockType);
-
-	if (cRoot::Get()->GetPluginManager()->CallHookPlayerPlacingBlock(*m_Player, a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, a_CursorX, a_CursorY, a_CursorZ, BlockType, BlockMeta))
-	{
-		// A plugin doesn't agree with placing the block, revert the block on the client:
-		World->SendBlockTo(a_BlockX, a_BlockY, a_BlockZ, m_Player);
-		m_Player->GetInventory().SendEquippedSlot();
-		return;
-	}
-	
-	// The actual block placement:
-	World->SetBlock(a_BlockX, a_BlockY, a_BlockZ, BlockType, BlockMeta);
-	if (!m_Player->IsGameModeCreative())
-	{
-		m_Player->GetInventory().RemoveOneEquippedItem();
-	}
-
-	cChunkInterface ChunkInterface(World->GetChunkMap());
-	NewBlock->OnPlacedByPlayer(ChunkInterface, *World, m_Player, a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, a_CursorX, a_CursorY, a_CursorZ, BlockType, BlockMeta);
-	
-	AString PlaceSound = cBlockInfo::GetPlaceSound(BlockType);
-	float Volume = 1.0f, Pitch = 0.8f;
-	if (PlaceSound == "dig.metal")
-	{
-		Pitch = 1.2f;
-		PlaceSound = "dig.stone";
-	}
-	else if (PlaceSound == "random.anvil_land")
-	{
-		Volume = 0.65f;
-	}
-
-	World->BroadcastSoundEffect(PlaceSound, a_BlockX + 0.5, a_BlockY + 0.5, a_BlockZ + 0.5, Volume, Pitch);
-
-	cRoot::Get()->GetPluginManager()->CallHookPlayerPlacedBlock(*m_Player, a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, a_CursorX, a_CursorY, a_CursorZ, BlockType, BlockMeta);
-}
-
-
-
-
-
 void cClientHandle::HandleChat(const AString & a_Message)
 {
 	// We no longer need to postpone message processing, because the messages already arrive in the Tick thread
diff --git a/src/ClientHandle.h b/src/ClientHandle.h
index 25dd250d9..5e10bb52f 100644
--- a/src/ClientHandle.h
+++ b/src/ClientHandle.h
@@ -459,9 +459,6 @@ private:
 	UInt32 m_ProtocolVersion;
 
 
-	/** Handles the block placing packet when it is a real block placement (not block-using, item-using or eating) */
-	void HandlePlaceBlock(int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace, int a_CursorX, int a_CursorY, int a_CursorZ, cItemHandler & a_ItemHandler);
-
 	/** Returns true if the rate block interactions is within a reasonable limit (bot protection) */
 	bool CheckBlockInteractionsRate(void);
 	
diff --git a/src/Entities/Player.cpp b/src/Entities/Player.cpp
index 15920d6cf..1d5cc6554 100644
--- a/src/Entities/Player.cpp
+++ b/src/Entities/Player.cpp
@@ -2,6 +2,7 @@
 #include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules
 
 #include "Player.h"
+#include <unordered_map>
 #include "../ChatColor.h"
 #include "../Server.h"
 #include "../UI/Window.h"
@@ -19,6 +20,10 @@
 #include "../WorldStorage/StatSerializer.h"
 #include "../CompositeChat.h"
 
+#include "../Blocks/BlockHandler.h"
+#include "../Blocks/BlockSlab.h"
+#include "../Blocks/ChunkInterface.h"
+
 #include "../IniFile.h"
 #include "json/json.h"
 
@@ -2168,6 +2173,97 @@ void cPlayer::LoadRank(void)
 
 
 
+bool cPlayer::PlaceBlock(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)
+{
+	sSetBlockVector blk{{a_BlockX, a_BlockY, a_BlockZ, a_BlockType, a_BlockMeta}};
+	return PlaceBlocks(blk);
+}
+
+
+
+
+
+void cPlayer::SendBlocksAround(int a_BlockX, int a_BlockY, int a_BlockZ, int a_Range)
+{
+	// Collect the coords of all the blocks to send:
+	sSetBlockVector blks;
+	for (int y = a_BlockY - a_Range + 1; y < a_BlockY + a_Range; y++)
+	{
+		for (int z = a_BlockZ - a_Range + 1; z < a_BlockZ + a_Range; z++)
+		{
+			for (int x = a_BlockX - a_Range + 1; x < a_BlockX + a_Range; x++)
+			{
+				blks.emplace_back(x, y, z, E_BLOCK_AIR, 0);  // Use fake blocktype, it will get set later on.
+			};
+		};
+	}  // for y
+
+	// Get the values of all the blocks:
+	if (!m_World->GetBlocks(blks, false))
+	{
+		LOGD("%s: Cannot query all blocks, not sending an update", __FUNCTION__);
+		return;
+	}
+
+	// Divide the block changes by their respective chunks:
+	std::unordered_map<cChunkCoords, sSetBlockVector, cChunkCoordsHash> Changes;
+	for (const auto & blk: blks)
+	{
+		Changes[cChunkCoords(blk.m_ChunkX, blk.m_ChunkZ)].push_back(blk);
+	}  // for blk - blks[]
+	blks.clear();
+
+	// Send the blocks for each affected chunk:
+	for (auto itr = Changes.cbegin(), end = Changes.cend(); itr != end; ++itr)
+	{
+		m_ClientHandle->SendBlockChanges(itr->first.m_ChunkX, itr->first.m_ChunkZ, itr->second);
+	}
+}
+
+
+
+
+
+bool cPlayer::PlaceBlocks(const sSetBlockVector & a_Blocks)
+{
+	// Call the "placing" hooks; if any fail, abort:
+	cPluginManager * pm = cPluginManager::Get();
+	for (auto blk: a_Blocks)
+	{
+		if (pm->CallHookPlayerPlacingBlock(*this, blk))
+		{
+			// Abort - re-send all the current blocks in the a_Blocks' coords to the client:
+			for (auto blk2: a_Blocks)
+			{
+				m_World->SendBlockTo(blk2.GetX(), blk2.GetY(), blk2.GetZ(), this);
+			}
+			return false;
+		}
+	}  // for blk - a_Blocks[]
+
+	// Set the blocks:
+	m_World->SetBlocks(a_Blocks);
+
+	// Notify the blockhandlers:
+	cChunkInterface ChunkInterface(m_World->GetChunkMap());
+	for (auto blk: a_Blocks)
+	{
+		cBlockHandler * newBlock = BlockHandler(blk.m_BlockType);
+		newBlock->OnPlacedByPlayer(ChunkInterface, *m_World, this, blk);
+	}
+
+	// Call the "placed" hooks:
+	for (auto blk: a_Blocks)
+	{
+		pm->CallHookPlayerPlacedBlock(*this, blk);
+	}
+	return true;
+}
+
+
+
+
+
 void cPlayer::Detach()
 {
 	super::Detach();
diff --git a/src/Entities/Player.h b/src/Entities/Player.h
index c643aaa8e..b94d2659e 100644
--- a/src/Entities/Player.h
+++ b/src/Entities/Player.h
@@ -440,8 +440,27 @@ public:
 	Loads the m_Rank, m_Permissions, m_MsgPrefix, m_MsgSuffix and m_MsgNameColorCode members. */
 	void LoadRank(void);
 
+	/** Calls the block-placement hook and places the block in the world, unless refused by the hook.
+	If the hook prevents the placement, sends the current block at the specified coords back to the client.
+	Assumes that the block is in a currently loaded chunk.
+	Returns true if the block is successfully placed. */
+	bool PlaceBlock(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta);
+
+	/** Sends the block in the specified range around the specified coord to the client
+	as a block change packet.
+	The blocks in range (a_BlockX - a_Range, a_BlockX + a_Range) are sent (NY-metric). */
+	void SendBlocksAround(int a_BlockX, int a_BlockY, int a_BlockZ, int a_Range = 1);
+
 	// tolua_end
 
+	/** Calls the block placement hooks and places the blocks in the world.
+	First the "placing" hooks for all the blocks are called, then the blocks are placed, and finally
+	the "placed" hooks are called.
+	If the any of the "placing" hooks aborts, none of the blocks are placed and the function returns false.
+	Returns true if all the blocks are placed.
+	Assumes that all the blocks are in currently loaded chunks. */
+	bool PlaceBlocks(const sSetBlockVector & a_Blocks);
+
 	// cEntity overrides:
 	virtual bool IsCrouched (void) const { return m_IsCrouched; }
 	virtual bool IsSprinting(void) const { return m_IsSprinting; }
diff --git a/src/Generating/StructGen.cpp b/src/Generating/StructGen.cpp
index 2f685c808..2d5a73739 100644
--- a/src/Generating/StructGen.cpp
+++ b/src/Generating/StructGen.cpp
@@ -123,18 +123,18 @@ void cStructGenTrees::GenerateSingleTree(
 	// Check if the generated image fits the terrain. Only the logs are checked:
 	for (sSetBlockVector::const_iterator itr = TreeLogs.begin(); itr != TreeLogs.end(); ++itr)
 	{
-		if ((itr->ChunkX != a_ChunkX) || (itr->ChunkZ != a_ChunkZ))
+		if ((itr->m_ChunkX != a_ChunkX) || (itr->m_ChunkZ != a_ChunkZ))
 		{
 			// Outside the chunk
 			continue;
 		}
-		if (itr->y >= cChunkDef::Height)
+		if (itr->m_RelY >= cChunkDef::Height)
 		{
 			// Above the chunk, cut off (this shouldn't happen too often, we're limiting trees to y < 230)
 			continue;
 		}
 
-		BLOCKTYPE Block = a_ChunkDesc.GetBlockType(itr->x, itr->y, itr->z);
+		BLOCKTYPE Block = a_ChunkDesc.GetBlockType(itr->m_RelX, itr->m_RelY, itr->m_RelZ);
 		switch (Block)
 		{
 			CASE_TREE_ALLOWED_BLOCKS:
@@ -167,14 +167,14 @@ void cStructGenTrees::ApplyTreeImage(
 	// Put the generated image into a_BlockTypes, push things outside this chunk into a_Blocks
 	for (sSetBlockVector::const_iterator itr = a_Image.begin(), end = a_Image.end(); itr != end; ++itr)
 	{
-		if ((itr->ChunkX == a_ChunkX) && (itr->ChunkZ == a_ChunkZ) && (itr->y < cChunkDef::Height))
+		if ((itr->m_ChunkX == a_ChunkX) && (itr->m_ChunkZ == a_ChunkZ) && (itr->m_RelY < cChunkDef::Height))
 		{
 			// Inside this chunk, integrate into a_ChunkDesc:
-			switch (a_ChunkDesc.GetBlockType(itr->x, itr->y, itr->z))
+			switch (a_ChunkDesc.GetBlockType(itr->m_RelX, itr->m_RelY, itr->m_RelZ))
 			{
 				case E_BLOCK_LEAVES:
 				{
-					if (itr->BlockType != E_BLOCK_LOG)
+					if (itr->m_BlockType != E_BLOCK_LOG)
 					{
 						break;
 					}
@@ -182,7 +182,7 @@ void cStructGenTrees::ApplyTreeImage(
 				}
 				CASE_TREE_OVERWRITTEN_BLOCKS:
 				{
-					a_ChunkDesc.SetBlockTypeMeta(itr->x, itr->y, itr->z, itr->BlockType, itr->BlockMeta);
+					a_ChunkDesc.SetBlockTypeMeta(itr->m_RelX, itr->m_RelY, itr->m_RelZ, itr->m_BlockType, itr->m_BlockMeta);
 					break;
 				}
 				
diff --git a/src/Generating/Trees.cpp b/src/Generating/Trees.cpp
index be8b0cd6b..a10e0f4f1 100644
--- a/src/Generating/Trees.cpp
+++ b/src/Generating/Trees.cpp
@@ -403,17 +403,17 @@ void GetLargeAppleTreeImage(int a_BlockX, int a_BlockY, int a_BlockZ, cNoise & a
 	for (auto itr : a_LogBlocks)
 	{
 		// Get the log's X and Z coordinates
-		int X = itr.ChunkX * 16 + itr.x;
-		int Z = itr.ChunkZ * 16 + itr.z;
+		int X = itr.GetX();
+		int Z = itr.GetZ();
 
-		a_OtherBlocks.push_back(sSetBlock(X, itr.y - 2, Z, E_BLOCK_LEAVES, E_META_LEAVES_APPLE));
-		PushCoordBlocks(X, itr.y - 2, Z, a_OtherBlocks, BigO1, ARRAYCOUNT(BigO1), E_BLOCK_LEAVES, E_META_LEAVES_APPLE);
+		a_OtherBlocks.push_back(sSetBlock(X, itr.m_RelY - 2, Z, E_BLOCK_LEAVES, E_META_LEAVES_APPLE));
+		PushCoordBlocks(X, itr.m_RelY - 2, Z, a_OtherBlocks, BigO1, ARRAYCOUNT(BigO1), E_BLOCK_LEAVES, E_META_LEAVES_APPLE);
 		for (int y = -1; y <= 1; y++)
 		{
-			PushCoordBlocks (X, itr.y + y, Z, a_OtherBlocks, BigO2, ARRAYCOUNT(BigO2), E_BLOCK_LEAVES, E_META_LEAVES_APPLE);
+			PushCoordBlocks (X, itr.m_RelY + y, Z, a_OtherBlocks, BigO2, ARRAYCOUNT(BigO2), E_BLOCK_LEAVES, E_META_LEAVES_APPLE);
 		}
-		PushCoordBlocks(X, itr.y + 2, Z, a_OtherBlocks, BigO1, ARRAYCOUNT(BigO1), E_BLOCK_LEAVES, E_META_LEAVES_APPLE);
-		a_OtherBlocks.push_back(sSetBlock(X, itr.y + 2, Z, E_BLOCK_LEAVES, E_META_LEAVES_APPLE));
+		PushCoordBlocks(X, itr.m_RelY + 2, Z, a_OtherBlocks, BigO1, ARRAYCOUNT(BigO1), E_BLOCK_LEAVES, E_META_LEAVES_APPLE);
+		a_OtherBlocks.push_back(sSetBlock(X, itr.m_RelY + 2, Z, E_BLOCK_LEAVES, E_META_LEAVES_APPLE));
 	}
 
 	// Trunk:
diff --git a/src/Items/CMakeLists.txt b/src/Items/CMakeLists.txt
index 12a467672..c50ddb372 100644
--- a/src/Items/CMakeLists.txt
+++ b/src/Items/CMakeLists.txt
@@ -10,12 +10,14 @@ SET (SRCS
 SET (HDRS
 	ItemArmor.h
 	ItemBed.h
+	ItemBigFlower.h
 	ItemBoat.h
 	ItemBow.h
 	ItemBrewingStand.h
 	ItemBucket.h
 	ItemCake.h
 	ItemCauldron.h
+	ItemChest.h
 	ItemCloth.h
 	ItemComparator.h
 	ItemDoor.h
@@ -38,18 +40,21 @@ SET (HDRS
 	ItemPainting.h
 	ItemPickaxe.h
 	ItemPotion.h
+	ItemPumpkin.h
 	ItemRedstoneDust.h
 	ItemRedstoneRepeater.h
 	ItemSapling.h
 	ItemSeeds.h
 	ItemShears.h
 	ItemShovel.h
+	ItemSlab.h
 	ItemSign.h
 	ItemSpawnEgg.h
 	ItemString.h
 	ItemSugarcane.h
 	ItemSword.h
-	ItemThrowable.h)
+	ItemThrowable.h
+)
 
 if(NOT MSVC)
 	add_library(Items ${SRCS} ${HDRS})
diff --git a/src/Items/ItemBed.h b/src/Items/ItemBed.h
index 94a14cf16..77d51d744 100644
--- a/src/Items/ItemBed.h
+++ b/src/Items/ItemBed.h
@@ -24,30 +24,36 @@ public:
 		return true;
 	}
 
-	virtual bool GetPlacementBlockTypeMeta(
-		cWorld * a_World, cPlayer * a_Player,
+
+	virtual bool OnPlayerPlace(
+		cWorld & a_World, cPlayer & a_Player, const cItem & a_EquippedItem,
 		int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace,
-		int a_CursorX, int a_CursorY, int a_CursorZ,
-		BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
+		int a_CursorX, int a_CursorY, int a_CursorZ
 	) override
 	{
+		// Can only be placed on the floor:
 		if (a_BlockFace != BLOCK_FACE_TOP)
 		{
-			// Can only be placed on the floor
 			return false;
 		}
+		AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, a_BlockFace);
 
-		a_BlockMeta = cBlockBedHandler::RotationToMetaData(a_Player->GetYaw());
+		// The "foot" block:
+		sSetBlockVector blks;
+		NIBBLETYPE BlockMeta = cBlockBedHandler::RotationToMetaData(a_Player.GetYaw());
+		blks.emplace_back(a_BlockX, a_BlockY, a_BlockZ, E_BLOCK_BED, BlockMeta);
 		
-		// Check if there is empty space for the foot section:
-		Vector3i Direction = cBlockBedHandler::MetaDataToDirection(a_BlockMeta);
-		if (a_World->GetBlock(a_BlockX + Direction.x, a_BlockY, a_BlockZ + Direction.z) != E_BLOCK_AIR)
+		// Check if there is empty space for the "head" block:
+		// (Vanilla only allows beds to be placed into air)
+		Vector3i Direction = cBlockBedHandler::MetaDataToDirection(BlockMeta);
+		if (a_World.GetBlock(a_BlockX + Direction.x, a_BlockY, a_BlockZ + Direction.z) != E_BLOCK_AIR)
 		{
 			return false;
 		}
+		blks.emplace_back(a_BlockX + Direction.x, a_BlockY, a_BlockZ + Direction.z, E_BLOCK_BED, BlockMeta | 0x08);
 
-		a_BlockType = E_BLOCK_BED;
-		return true;
+		// Place both bed blocks:
+		return a_Player.PlaceBlocks(blks);
 	}
 } ;
 
diff --git a/src/Items/ItemBigFlower.h b/src/Items/ItemBigFlower.h
new file mode 100644
index 000000000..4341a1a17
--- /dev/null
+++ b/src/Items/ItemBigFlower.h
@@ -0,0 +1,56 @@
+
+// ItemBigFlower.h
+
+// Declares the cItemBigFlower class representing the cItemHandler for big flowers
+
+
+
+
+
+#pragma once
+
+#include "ItemHandler.h"
+
+
+
+
+
+class cItemBigFlowerHandler:
+	public cItemHandler
+{
+	typedef cItemHandler super;
+
+public:
+	cItemBigFlowerHandler(void):
+		super(E_BLOCK_BIG_FLOWER)
+	{
+	}
+
+
+	virtual bool OnPlayerPlace(
+		cWorld & a_World, cPlayer & a_Player, const cItem & a_EquippedItem,
+		int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace,
+		int a_CursorX, int a_CursorY, int a_CursorZ
+	) override
+	{
+		// Can only be placed on the floor:
+		if (a_BlockFace != BLOCK_FACE_TOP)
+		{
+			return false;
+		}
+		AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, a_BlockFace);
+
+		// Place both blocks atomically:
+		sSetBlockVector blks;
+		blks.emplace_back(a_BlockX, a_BlockY, a_BlockZ, E_BLOCK_BIG_FLOWER, a_EquippedItem.m_ItemDamage & 0x07);
+		if (a_BlockY < cChunkDef::Height - 1)
+		{
+			blks.emplace_back(a_BlockX, a_BlockY + 1, a_BlockZ, E_BLOCK_BIG_FLOWER, (a_EquippedItem.m_ItemDamage & 0x07) | 0x08);
+		}
+		return a_Player.PlaceBlocks(blks);
+	}
+};
+
+
+
+
diff --git a/src/Items/ItemChest.h b/src/Items/ItemChest.h
new file mode 100644
index 000000000..b6579c423
--- /dev/null
+++ b/src/Items/ItemChest.h
@@ -0,0 +1,167 @@
+
+// ItemChest.h
+
+// Declares the cItemChestHandler class representing the cItemHandler descendant responsible for chests
+
+
+
+
+
+#pragma once
+
+#include "ItemHandler.h"
+#include "../Blocks/BlockChest.h"
+
+
+
+
+
+class cItemChestHandler:
+	public cItemHandler
+{
+	typedef cItemHandler super;
+public:
+	cItemChestHandler(int a_ItemType):
+		super(a_ItemType)
+	{
+	}
+
+
+	virtual bool OnPlayerPlace(
+		cWorld & a_World, cPlayer & a_Player, const cItem & a_EquippedItem,
+		int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace,
+		int a_CursorX, int a_CursorY, int a_CursorZ
+	) override
+	{
+		if (a_BlockFace < 0)
+		{
+			// Clicked in air
+			return false;
+		}
+	
+		if ((a_BlockY < 0) || (a_BlockY >= cChunkDef::Height))
+		{
+			// The clicked block is outside the world, ignore this call altogether (#128)
+			return false;
+		}
+
+		// Check if the block ignores build collision (water, grass etc.):
+		BLOCKTYPE ClickedBlock;
+		NIBBLETYPE ClickedBlockMeta;
+		a_World.GetBlockTypeMeta(a_BlockX, a_BlockY, a_BlockZ, ClickedBlock, ClickedBlockMeta);
+		if (
+			BlockHandler(ClickedBlock)->DoesIgnoreBuildCollision() ||
+			BlockHandler(ClickedBlock)->DoesIgnoreBuildCollision(&a_Player, ClickedBlockMeta)
+		)
+		{
+			cChunkInterface ChunkInterface(a_World.GetChunkMap());
+			BlockHandler(ClickedBlock)->OnDestroyedByPlayer(ChunkInterface, a_World, &a_Player, a_BlockX, a_BlockY, a_BlockZ);
+		}
+		else
+		{
+			AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, a_BlockFace);
+			
+			if ((a_BlockY < 0) || (a_BlockY >= cChunkDef::Height))
+			{
+				// The block is being placed outside the world, ignore this packet altogether (#128)
+				return false;
+			}
+			
+			NIBBLETYPE PlaceMeta;
+			BLOCKTYPE PlaceBlock;
+			a_World.GetBlockTypeMeta(a_BlockX, a_BlockY, a_BlockZ, PlaceBlock, PlaceMeta);
+
+			// Clicked on side of block, make sure that placement won't be cancelled if there is a slab able to be double slabbed.
+			// No need to do combinability (dblslab) checks, client will do that here.
+			if (
+				!BlockHandler(PlaceBlock)->DoesIgnoreBuildCollision() &&
+				!BlockHandler(PlaceBlock)->DoesIgnoreBuildCollision(&a_Player, PlaceMeta)
+			)
+			{
+				// Tried to place a block *into* another?
+				// Happens when you place a block aiming at side of block with a torch on it or stem beside it
+				return false;
+			}
+		}
+
+		// Check that there is at most one single neighbor of the same chest type:
+		static const Vector3i CrossCoords[] =
+		{
+			{-1, 0,  0},
+			{ 0, 0, -1},
+			{ 1, 0,  0},
+			{ 0, 0,  1},
+		};
+		int NeighborIdx = -1;
+		for (size_t i = 0; i < ARRAYCOUNT(CrossCoords); i++)
+		{
+			if (a_World.GetBlock(a_BlockX + CrossCoords[i].x, a_BlockY, a_BlockZ + CrossCoords[i].z) != m_ItemType)
+			{
+				continue;
+			}
+			if (NeighborIdx >= 0)
+			{
+				// Can't place here, there are already two neighbors, this would form a 3-block chest
+				return false;
+			}
+			NeighborIdx = static_cast<int>(i);
+
+			// Check that this neighbor is a single chest:
+			int bx = a_BlockX + CrossCoords[i].x;
+			int bz = a_BlockZ + CrossCoords[i].z;
+			for (size_t j = 0; j < ARRAYCOUNT(CrossCoords); j++)
+			{
+				if (a_World.GetBlock(bx + CrossCoords[j].x, a_BlockY, bz + CrossCoords[j].z) == m_ItemType)
+				{
+					return false;
+				}
+			}  // for j
+		}  // for i
+
+		// If there's no chest neighbor, place the single block chest and bail out:
+		BLOCKTYPE ChestBlockType = static_cast<BLOCKTYPE>(m_ItemType);
+		if (NeighborIdx < 0)
+		{
+			NIBBLETYPE Meta = cBlockChestHandler::PlayerYawToMetaData(a_Player.GetYaw());
+			return a_Player.PlaceBlock(a_BlockX, a_BlockY, a_BlockZ, ChestBlockType, Meta);
+		}
+
+		// There is a neighbor to which we need to adjust
+		double yaw = a_Player.GetYaw();
+		if ((NeighborIdx == 0) || (NeighborIdx == 2))
+		{
+			// The neighbor is in the X axis, form a X-axis-aligned dblchest:
+			NIBBLETYPE Meta = ((yaw >= -90) && (yaw < 90)) ? E_META_CHEST_FACING_ZM : E_META_CHEST_FACING_ZP;
+
+			// Place the new chest:
+			if (!a_Player.PlaceBlock(a_BlockX, a_BlockY, a_BlockZ, ChestBlockType, Meta))
+			{
+				return false;
+			}
+
+			// Adjust the existing chest:
+			a_World.FastSetBlock(a_BlockX + CrossCoords[NeighborIdx].x, a_BlockY, a_BlockZ + CrossCoords[NeighborIdx].z, ChestBlockType, Meta);
+			return true;
+		}
+
+		// The neighbor is in the Z axis, form a Z-axis-aligned dblchest:
+		NIBBLETYPE Meta = (yaw < 0) ? E_META_CHEST_FACING_XM : E_META_CHEST_FACING_XP;
+
+		// Place the new chest:
+		if (!a_Player.PlaceBlock(a_BlockX, a_BlockY, a_BlockZ, ChestBlockType, Meta))
+		{
+			return false;
+		}
+
+		// Adjust the existing chest:
+		a_World.FastSetBlock(a_BlockX + CrossCoords[NeighborIdx].x, a_BlockY, a_BlockZ + CrossCoords[NeighborIdx].z, ChestBlockType, Meta);
+		return true;
+	}
+
+private:
+	cItemChestHandler(const cItemChestHandler &) = delete;
+};
+
+
+
+
diff --git a/src/Items/ItemDoor.h b/src/Items/ItemDoor.h
index cd5baf44f..dbba26728 100644
--- a/src/Items/ItemDoor.h
+++ b/src/Items/ItemDoor.h
@@ -3,6 +3,7 @@
 
 #include "ItemHandler.h"
 #include "../World.h"
+#include "../Blocks/BlockDoor.h"
 
 
 
@@ -18,27 +19,43 @@ public:
 
 	}
 
-	virtual bool IsPlaceable(void) override
-	{
-		return true;
-	}
 
-	virtual bool GetPlacementBlockTypeMeta(
-		cWorld * a_World, cPlayer * a_Player,
+	virtual bool OnPlayerPlace(
+		cWorld & a_World, cPlayer & a_Player, const cItem & a_EquippedItem,
 		int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace,
-		int a_CursorX, int a_CursorY, int a_CursorZ,
-		BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
+		int a_CursorX, int a_CursorY, int a_CursorZ
 	) override
 	{
+		// Vanilla only allows door placement while clicking on the top face of the block below the door:
+		if (a_BlockFace != BLOCK_FACE_NONE)
+		{
+			return false;
+		}
+		AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, a_BlockFace);
+
+		// Door (bottom block) can be placed in Y range of [1, 254]:
+		if ((a_BlockY < 1) || (a_BlockY + 2 >= cChunkDef::Height))
+		{
+			return false;
+		}
+
+		// The door needs a compatible block below it:
+		if ((a_BlockY > 0) && cBlockDoorHandler::CanBeOn(a_World.GetBlock(a_BlockX, a_BlockY - 1, a_BlockZ)))
+		{
+			return false;
+		}
+
+		// Get the block type of the door to place:
+		BLOCKTYPE BlockType;
 		switch (m_ItemType)
 		{
-			case E_ITEM_WOODEN_DOOR:   a_BlockType = E_BLOCK_WOODEN_DOOR; break;
-			case E_ITEM_IRON_DOOR:     a_BlockType = E_BLOCK_IRON_DOOR; break;
-			case E_ITEM_SPRUCE_DOOR:   a_BlockType = E_BLOCK_SPRUCE_DOOR; break;
-			case E_ITEM_BIRCH_DOOR:    a_BlockType = E_BLOCK_BIRCH_DOOR; break;
-			case E_ITEM_JUNGLE_DOOR:   a_BlockType = E_BLOCK_JUNGLE_DOOR; break;
-			case E_ITEM_DARK_OAK_DOOR: a_BlockType = E_BLOCK_DARK_OAK_DOOR; break;
-			case E_ITEM_ACACIA_DOOR:   a_BlockType = E_BLOCK_ACACIA_DOOR; break;
+			case E_ITEM_WOODEN_DOOR:   BlockType = E_BLOCK_WOODEN_DOOR;   break;
+			case E_ITEM_IRON_DOOR:     BlockType = E_BLOCK_IRON_DOOR;     break;
+			case E_ITEM_SPRUCE_DOOR:   BlockType = E_BLOCK_SPRUCE_DOOR;   break;
+			case E_ITEM_BIRCH_DOOR:    BlockType = E_BLOCK_BIRCH_DOOR;    break;
+			case E_ITEM_JUNGLE_DOOR:   BlockType = E_BLOCK_JUNGLE_DOOR;   break;
+			case E_ITEM_DARK_OAK_DOOR: BlockType = E_BLOCK_DARK_OAK_DOOR; break;
+			case E_ITEM_ACACIA_DOOR:   BlockType = E_BLOCK_ACACIA_DOOR;   break;
 			default:
 			{
 				ASSERT(!"Unhandled door type");
@@ -46,14 +63,47 @@ public:
 			}
 		}
 		
-		cChunkInterface ChunkInterface(a_World->GetChunkMap());
-		bool Meta = BlockHandler(a_BlockType)->GetPlacementBlockTypeMeta(
-			ChunkInterface, a_Player,
-			a_BlockX, a_BlockY, a_BlockZ, a_BlockFace,
-			a_CursorX, a_CursorY, a_CursorZ,
-			a_BlockType, a_BlockMeta
-		);
-		return Meta;
+		// Check the two blocks that will get replaced by the door:
+		BLOCKTYPE LowerBlockType = a_World.GetBlock(a_BlockX, a_BlockY + 1, a_BlockZ);
+		BLOCKTYPE UpperBlockType = a_World.GetBlock(a_BlockX, a_BlockY + 2, a_BlockZ);
+		if (
+			!cBlockDoorHandler::CanReplaceBlock(LowerBlockType) ||
+			!cBlockDoorHandler::CanReplaceBlock(UpperBlockType))
+		{
+			return false;
+		}
+
+		// Get the coords of the neighboring blocks:
+		NIBBLETYPE LowerBlockMeta = cBlockDoorHandler::PlayerYawToMetaData(a_Player.GetYaw());
+		Vector3i RelDirToOutside = cBlockDoorHandler::GetRelativeDirectionToOutside(LowerBlockMeta);
+		Vector3i LeftNeighborPos = RelDirToOutside;
+		LeftNeighborPos.TurnCCW();
+		LeftNeighborPos.Move(a_BlockX, a_BlockY, a_BlockZ);
+		Vector3i RightNeighborPos = RelDirToOutside;
+		RightNeighborPos.TurnCW();
+		RightNeighborPos.Move(a_BlockX, a_BlockY, a_BlockZ);
+
+		// Decide whether the hinge is on the left (default) or on the right:
+		NIBBLETYPE UpperBlockMeta = 0x08;
+		if (
+			cBlockDoorHandler::IsDoorBlockType(a_World.GetBlock(LeftNeighborPos)) ||  // The block to the left is a door block
+			cBlockInfo::IsSolid(a_World.GetBlock(RightNeighborPos))                   // The block to the right is solid
+		)
+		{
+			UpperBlockMeta = 0x09;  // Upper block | hinge on right
+		}
+
+		// Set the blocks:
+		sSetBlockVector blks;
+		blks.emplace_back(a_BlockX, a_BlockY, a_BlockZ, BlockType, LowerBlockMeta);
+		blks.emplace_back(a_BlockX, a_BlockY + 1, a_BlockZ, BlockType, UpperBlockMeta);
+		return a_Player.PlaceBlocks(blks);
+	}
+
+
+	virtual bool IsPlaceable(void) override
+	{
+		return true;
 	}
 } ;
 
diff --git a/src/Items/ItemDye.h b/src/Items/ItemDye.h
index da978040d..bfcd0bac4 100644
--- a/src/Items/ItemDye.h
+++ b/src/Items/ItemDye.h
@@ -55,25 +55,16 @@ public:
 				return false;
 			}
 
-			// Check plugins
-			if (cRoot::Get()->GetPluginManager()->CallHookPlayerPlacingBlock(*a_Player, a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, 0, 0, 0, E_BLOCK_COCOA_POD, BlockMeta))
+			// Place the cocoa pod:
+			if (a_Player->PlaceBlock(a_BlockX, a_BlockY, a_BlockZ, E_BLOCK_COCOA_POD, BlockMeta))
 			{
-				a_World->SendBlockTo(a_BlockX, a_BlockY, a_BlockZ, a_Player);
-				a_Player->GetInventory().SendEquippedSlot();
-				return false;
-			}
-
-			// Set block and broadcast place sound
-			a_World->SetBlock(a_BlockX, a_BlockY, a_BlockZ, E_BLOCK_COCOA_POD, BlockMeta);
-			a_World->BroadcastSoundEffect("dig.stone", a_BlockX + 0.5, a_BlockY + 0.5, a_BlockZ + 0.5, 1.0f, 0.8f);
-
-			// Remove one cocoa pod from the inventory
-			if (!a_Player->IsGameModeCreative())
-			{
-				a_Player->GetInventory().RemoveOneEquippedItem();
+				a_World->BroadcastSoundEffect("dig.stone", a_BlockX + 0.5, a_BlockY + 0.5, a_BlockZ + 0.5, 1.0f, 0.8f);
+				if (a_Player->IsGameModeSurvival())
+				{
+					a_Player->GetInventory().RemoveOneEquippedItem();
+				}
+				return true;
 			}
-			cRoot::Get()->GetPluginManager()->CallHookPlayerPlacedBlock(*a_Player, a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, 0, 0, 0, E_BLOCK_COCOA_POD, BlockMeta);
-			return true;
 		}
 		return false;
 	}
diff --git a/src/Items/ItemHandler.cpp b/src/Items/ItemHandler.cpp
index 9272a723d..92c55ec62 100644
--- a/src/Items/ItemHandler.cpp
+++ b/src/Items/ItemHandler.cpp
@@ -6,39 +6,43 @@
 #include "../Entities/Player.h"
 #include "../FastRandom.h"
 #include "../BlockInServerPluginInterface.h"
+#include "../Chunk.h"
 
 // Handlers:
 #include "ItemArmor.h"
 #include "ItemBed.h"
+#include "ItemBigFlower.h"
 #include "ItemBoat.h"
 #include "ItemBow.h"
 #include "ItemBrewingStand.h"
 #include "ItemBucket.h"
 #include "ItemCake.h"
 #include "ItemCauldron.h"
+#include "ItemChest.h"
 #include "ItemCloth.h"
 #include "ItemComparator.h"
 #include "ItemDoor.h"
-#include "ItemMilk.h"
 #include "ItemDye.h"
 #include "ItemEmptyMap.h"
 #include "ItemFishingRod.h"
 #include "ItemFlowerPot.h"
 #include "ItemFood.h"
 #include "ItemGoldenApple.h"
-#include "ItemItemFrame.h"
 #include "ItemHoe.h"
+#include "ItemItemFrame.h"
 #include "ItemLeaves.h"
 #include "ItemLighter.h"
 #include "ItemLilypad.h"
 #include "ItemMap.h"
+#include "ItemMilk.h"
 #include "ItemMinecart.h"
+#include "ItemMobHead.h"
 #include "ItemMushroomSoup.h"
 #include "ItemNetherWart.h"
 #include "ItemPainting.h"
 #include "ItemPickaxe.h"
 #include "ItemPotion.h"
-#include "ItemThrowable.h"
+#include "ItemPumpkin.h"
 #include "ItemRedstoneDust.h"
 #include "ItemRedstoneRepeater.h"
 #include "ItemSapling.h"
@@ -46,11 +50,12 @@
 #include "ItemShears.h"
 #include "ItemShovel.h"
 #include "ItemSign.h"
-#include "ItemMobHead.h"
+#include "ItemSlab.h"
 #include "ItemSpawnEgg.h"
 #include "ItemString.h"
 #include "ItemSugarcane.h"
 #include "ItemSword.h"
+#include "ItemThrowable.h"
 
 #include "../Blocks/BlockHandler.h"
 
@@ -94,52 +99,58 @@ cItemHandler * cItemHandler::GetItemHandler(int a_ItemType)
 
 
 
-cItemHandler *cItemHandler::CreateItemHandler(int a_ItemType)
+cItemHandler * cItemHandler::CreateItemHandler(int a_ItemType)
 {
 	switch (a_ItemType)
 	{
 		default:                       return new cItemHandler(a_ItemType);
 		
 		// Single item per handler, alphabetically sorted:
-		case E_BLOCK_LEAVES:           return new cItemLeavesHandler(a_ItemType);
-		case E_BLOCK_NEW_LEAVES:       return new cItemLeavesHandler(a_ItemType);
-		case E_BLOCK_SAPLING:          return new cItemSaplingHandler(a_ItemType);
-		case E_BLOCK_WOOL:             return new cItemClothHandler(a_ItemType);
-		case E_ITEM_BED:               return new cItemBedHandler(a_ItemType);
-		case E_ITEM_BOAT:              return new cItemBoatHandler(a_ItemType);
+		case E_BLOCK_CHEST:              return new cItemChestHandler(a_ItemType);
+		case E_BLOCK_LEAVES:             return new cItemLeavesHandler(a_ItemType);
+		case E_BLOCK_HEAD:               return new cItemMobHeadHandler(a_ItemType);
+		case E_BLOCK_NEW_LEAVES:         return new cItemLeavesHandler(a_ItemType);
+		case E_BLOCK_PUMPKIN:            return new cItemPumpkinHandler;
+		case E_BLOCK_SAPLING:            return new cItemSaplingHandler(a_ItemType);
+		case E_BLOCK_STONE_SLAB:         return new cItemSlabHandler(E_BLOCK_STONE_SLAB,  E_BLOCK_DOUBLE_STONE_SLAB);
+		case E_BLOCK_TRAPPED_CHEST:      return new cItemChestHandler(a_ItemType);
+		case E_BLOCK_WOODEN_SLAB:        return new cItemSlabHandler(E_BLOCK_WOODEN_SLAB, E_BLOCK_DOUBLE_WOODEN_SLAB);
+		case E_BLOCK_WOOL:               return new cItemClothHandler(a_ItemType);
+		case E_ITEM_BED:                 return new cItemBedHandler(a_ItemType);
+		case E_ITEM_BOAT:                return new cItemBoatHandler(a_ItemType);
 		case E_ITEM_BOTTLE_O_ENCHANTING: return new cItemBottleOEnchantingHandler();
-		case E_ITEM_BOW:               return new cItemBowHandler();
-		case E_ITEM_BREWING_STAND:     return new cItemBrewingStandHandler(a_ItemType);
-		case E_ITEM_CAKE:              return new cItemCakeHandler(a_ItemType);
-		case E_ITEM_CAULDRON:          return new cItemCauldronHandler(a_ItemType);
-		case E_ITEM_COMPARATOR:        return new cItemComparatorHandler(a_ItemType);
-		case E_ITEM_DYE:               return new cItemDyeHandler(a_ItemType);
-		case E_ITEM_EGG:               return new cItemEggHandler();
-		case E_ITEM_EMPTY_MAP:         return new cItemEmptyMapHandler();
-		case E_ITEM_ENDER_PEARL:       return new cItemEnderPearlHandler();
-		case E_ITEM_FIRE_CHARGE:       return new cItemLighterHandler(a_ItemType);
-		case E_ITEM_FIREWORK_ROCKET:   return new cItemFireworkHandler();
-		case E_ITEM_FISHING_ROD:       return new cItemFishingRodHandler(a_ItemType);
-		case E_ITEM_FLINT_AND_STEEL:   return new cItemLighterHandler(a_ItemType);
-		case E_ITEM_FLOWER_POT:        return new cItemFlowerPotHandler(a_ItemType);
-		case E_ITEM_GOLDEN_APPLE:      return new cItemGoldenAppleHandler();
-		case E_BLOCK_LILY_PAD:         return new cItemLilypadHandler(a_ItemType);
-		case E_ITEM_MAP:               return new cItemMapHandler();
-		case E_ITEM_MILK:              return new cItemMilkHandler();
-		case E_ITEM_MUSHROOM_SOUP:     return new cItemMushroomSoupHandler(a_ItemType);
-		case E_ITEM_ITEM_FRAME:        return new cItemItemFrameHandler(a_ItemType);
-		case E_ITEM_NETHER_WART:       return new cItemNetherWartHandler(a_ItemType);
-		case E_ITEM_PAINTING:          return new cItemPaintingHandler(a_ItemType);
-		case E_ITEM_POTIONS:           return new cItemPotionHandler();
-		case E_ITEM_REDSTONE_DUST:     return new cItemRedstoneDustHandler(a_ItemType);
-		case E_ITEM_REDSTONE_REPEATER: return new cItemRedstoneRepeaterHandler(a_ItemType);
-		case E_ITEM_SHEARS:            return new cItemShearsHandler(a_ItemType);
-		case E_ITEM_SIGN:              return new cItemSignHandler(a_ItemType);
-		case E_ITEM_HEAD:              return new cItemMobHeadHandler(a_ItemType);
-		case E_ITEM_SNOWBALL:          return new cItemSnowballHandler();
-		case E_ITEM_SPAWN_EGG:         return new cItemSpawnEggHandler(a_ItemType);
-		case E_ITEM_STRING:            return new cItemStringHandler(a_ItemType);
-		case E_ITEM_SUGARCANE:         return new cItemSugarcaneHandler(a_ItemType);
+		case E_ITEM_BOW:                 return new cItemBowHandler();
+		case E_ITEM_BREWING_STAND:       return new cItemBrewingStandHandler(a_ItemType);
+		case E_ITEM_CAKE:                return new cItemCakeHandler(a_ItemType);
+		case E_ITEM_CAULDRON:            return new cItemCauldronHandler(a_ItemType);
+		case E_ITEM_COMPARATOR:          return new cItemComparatorHandler(a_ItemType);
+		case E_ITEM_DYE:                 return new cItemDyeHandler(a_ItemType);
+		case E_ITEM_EGG:                 return new cItemEggHandler();
+		case E_ITEM_EMPTY_MAP:           return new cItemEmptyMapHandler();
+		case E_ITEM_ENDER_PEARL:         return new cItemEnderPearlHandler();
+		case E_ITEM_FIRE_CHARGE:         return new cItemLighterHandler(a_ItemType);
+		case E_ITEM_FIREWORK_ROCKET:     return new cItemFireworkHandler();
+		case E_ITEM_FISHING_ROD:         return new cItemFishingRodHandler(a_ItemType);
+		case E_ITEM_FLINT_AND_STEEL:     return new cItemLighterHandler(a_ItemType);
+		case E_ITEM_FLOWER_POT:          return new cItemFlowerPotHandler(a_ItemType);
+		case E_ITEM_GOLDEN_APPLE:        return new cItemGoldenAppleHandler();
+		case E_BLOCK_LILY_PAD:           return new cItemLilypadHandler(a_ItemType);
+		case E_ITEM_MAP:                 return new cItemMapHandler();
+		case E_ITEM_MILK:                return new cItemMilkHandler();
+		case E_ITEM_MUSHROOM_SOUP:       return new cItemMushroomSoupHandler(a_ItemType);
+		case E_ITEM_ITEM_FRAME:          return new cItemItemFrameHandler(a_ItemType);
+		case E_ITEM_NETHER_WART:         return new cItemNetherWartHandler(a_ItemType);
+		case E_ITEM_PAINTING:            return new cItemPaintingHandler(a_ItemType);
+		case E_ITEM_POTIONS:             return new cItemPotionHandler();
+		case E_ITEM_REDSTONE_DUST:       return new cItemRedstoneDustHandler(a_ItemType);
+		case E_ITEM_REDSTONE_REPEATER:   return new cItemRedstoneRepeaterHandler(a_ItemType);
+		case E_ITEM_SHEARS:              return new cItemShearsHandler(a_ItemType);
+		case E_ITEM_SIGN:                return new cItemSignHandler(a_ItemType);
+		case E_ITEM_HEAD:                return new cItemMobHeadHandler(a_ItemType);
+		case E_ITEM_SNOWBALL:            return new cItemSnowballHandler();
+		case E_ITEM_SPAWN_EGG:           return new cItemSpawnEggHandler(a_ItemType);
+		case E_ITEM_STRING:              return new cItemStringHandler(a_ItemType);
+		case E_ITEM_SUGARCANE:           return new cItemSugarcaneHandler(a_ItemType);
 		
 		case E_ITEM_WOODEN_HOE:
 		case E_ITEM_STONE_HOE:
@@ -297,6 +308,108 @@ cItemHandler::cItemHandler(int a_ItemType)
 
 
 
+bool cItemHandler::OnPlayerPlace(
+	cWorld & a_World, cPlayer & a_Player, const cItem & a_EquippedItem,
+	int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace,
+	int a_CursorX, int a_CursorY, int a_CursorZ
+)
+{
+	if (a_BlockFace < 0)
+	{
+		// Clicked in air
+		return false;
+	}
+	
+	if ((a_BlockY < 0) || (a_BlockY >= cChunkDef::Height))
+	{
+		// The clicked block is outside the world, ignore this call altogether (#128)
+		return false;
+	}
+	
+	BLOCKTYPE ClickedBlock;
+	NIBBLETYPE ClickedBlockMeta;
+
+	a_World.GetBlockTypeMeta(a_BlockX, a_BlockY, a_BlockZ, ClickedBlock, ClickedBlockMeta);
+
+	// Check if the block ignores build collision (water, grass etc.):
+	if (
+		BlockHandler(ClickedBlock)->DoesIgnoreBuildCollision() ||
+		BlockHandler(ClickedBlock)->DoesIgnoreBuildCollision(&a_Player, ClickedBlockMeta)
+		)
+	{
+		cChunkInterface ChunkInterface(a_World.GetChunkMap());
+		BlockHandler(ClickedBlock)->OnDestroyedByPlayer(ChunkInterface, a_World, &a_Player, a_BlockX, a_BlockY, a_BlockZ);
+	}
+	else
+	{
+		AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, a_BlockFace);
+			
+		if ((a_BlockY < 0) || (a_BlockY >= cChunkDef::Height))
+		{
+			// The block is being placed outside the world, ignore this packet altogether (#128)
+			return false;
+		}
+			
+		NIBBLETYPE PlaceMeta;
+		BLOCKTYPE PlaceBlock;
+		a_World.GetBlockTypeMeta(a_BlockX, a_BlockY, a_BlockZ, PlaceBlock, PlaceMeta);
+
+		// Clicked on side of block, make sure that placement won't be cancelled if there is a slab able to be double slabbed.
+		// No need to do combinability (dblslab) checks, client will do that here.
+		if (
+			!BlockHandler(PlaceBlock)->DoesIgnoreBuildCollision() &&
+			!BlockHandler(PlaceBlock)->DoesIgnoreBuildCollision(&a_Player, PlaceMeta)
+			)
+		{
+			// Tried to place a block *into* another?
+			// Happens when you place a block aiming at side of block with a torch on it or stem beside it
+			return false;
+		}
+	}
+	
+	BLOCKTYPE BlockType;
+	NIBBLETYPE BlockMeta;
+	if (!GetPlacementBlockTypeMeta(&a_World, &a_Player, a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, a_CursorX, a_CursorY, a_CursorZ, BlockType, BlockMeta))
+	{
+		// Handler refused the placement, send that information back to the client:
+		a_World.SendBlockTo(a_BlockX, a_BlockY, a_BlockZ, &a_Player);
+		a_Player.GetInventory().SendEquippedSlot();
+		return false;
+	}
+	
+	if (!a_Player.PlaceBlock(a_BlockX, a_BlockY, a_BlockZ, BlockType, BlockMeta))
+	{
+		// The placement failed, the block has already been re-sent, re-send inventory:
+		a_Player.GetInventory().SendEquippedSlot();
+		return false;
+	}
+
+	AString PlaceSound = cBlockInfo::GetPlaceSound(BlockType);
+	float Volume = 1.0f, Pitch = 0.8f;
+	if (PlaceSound == "dig.metal")
+	{
+		Pitch = 1.2f;
+		PlaceSound = "dig.stone";
+	}
+	else if (PlaceSound == "random.anvil_land")
+	{
+		Volume = 0.65f;
+	}
+
+	a_World.BroadcastSoundEffect(PlaceSound, a_BlockX + 0.5, a_BlockY + 0.5, a_BlockZ + 0.5, Volume, Pitch);
+
+	// Remove the "placed" item:
+	if (a_Player.IsGameModeSurvival())
+	{
+		a_Player.GetInventory().RemoveOneEquippedItem();
+	}
+	return true;
+}
+
+
+
+
+
 bool cItemHandler::OnItemUse(cWorld * a_World, cPlayer * a_Player, const cItem & a_Item, int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_Dir)
 {
 	UNUSED(a_World);
diff --git a/src/Items/ItemHandler.h b/src/Items/ItemHandler.h
index 67c250a97..3ac664798 100644
--- a/src/Items/ItemHandler.h
+++ b/src/Items/ItemHandler.h
@@ -31,10 +31,35 @@ public:
 	
 	/** Force virtual destructor */
 	virtual ~cItemHandler() {}
+
+
+	/** Called when the player tries to place the item (right mouse button, IsPlaceable() == true).
+	The default handler uses GetPlacementBlockTypeMeta and places the returned block.
+	Override this function for advanced behavior such as placing multiple blocks.
+	If the block placement is refused inside this call, it will automatically revert the client-side changes.
+	Returns true if the placement succeeded, false if the placement was aborted for any reason. */
+	virtual bool OnPlayerPlace(
+		cWorld & a_World, cPlayer & a_Player, const cItem & a_EquippedItem,
+		int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace,
+		int a_CursorX, int a_CursorY, int a_CursorZ
+	);
 	
+
+	/** Called when the player right-clicks with this item and IsPlaceable() == true, and OnPlace() is not overridden.
+	This function should provide the block type and meta for the placed block, or refuse the placement.
+	Returns true to allow placement, false to refuse. */
+	virtual bool GetPlacementBlockTypeMeta(
+		cWorld * a_World, cPlayer * a_Player,
+		int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace,
+		int a_CursorX, int a_CursorY, int a_CursorZ,
+		BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
+	);
+	
+
 	/** Called when the player tries to use the item (right mouse button). Return false to make the item unusable. DEFAULT: False */
 	virtual bool OnItemUse(cWorld * a_World, cPlayer * a_Player, const cItem & a_Item, int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_Dir);
 	
+
 	/** Called when the client sends the SHOOT status in the lclk packet */
 	virtual void OnItemShoot(cPlayer *, int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace)
 	{
@@ -106,18 +131,8 @@ public:
 	/** Can the anvil repair this item, when a_Item is the second input? */
 	virtual bool CanRepairWithRawMaterial(short a_ItemType);
 
-	/** Called before a block is placed into a world.
-	The handler should return true to allow placement, false to refuse.
-	Also, the handler should set a_BlockType and a_BlockMeta to correct values for the newly placed block.
-	*/
-	virtual bool GetPlacementBlockTypeMeta(
-		cWorld * a_World, cPlayer * a_Player,
-		int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace,
-		int a_CursorX, int a_CursorY, int a_CursorZ,
-		BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
-	);
-	
-	/** Returns whether this tool/item can harvest a specific block (e.g. wooden pickaxe can harvest stone, but wood can't) DEFAULT: False */
+	/** Returns whether this tool / item can harvest a specific block (e.g. iron pickaxe can harvest diamond ore, but wooden one can't).
+	Defaults to false unless overridden. */
 	virtual bool CanHarvestBlock(BLOCKTYPE a_BlockType);
 
 	static cItemHandler * GetItemHandler(int a_ItemType);
diff --git a/src/Items/ItemMobHead.h b/src/Items/ItemMobHead.h
index 4c36fe8d8..d962dabae 100644
--- a/src/Items/ItemMobHead.h
+++ b/src/Items/ItemMobHead.h
@@ -3,6 +3,7 @@
 
 #include "ItemHandler.h"
 #include "../World.h"
+#include "../BlockEntities/MobHeadEntity.h"
 
 
 
@@ -18,6 +19,266 @@ public:
 	}
 
 
+	virtual bool OnPlayerPlace(
+		cWorld & a_World, cPlayer & a_Player, const cItem & a_EquippedItem,
+		int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace,
+		int a_CursorX, int a_CursorY, int a_CursorZ
+	) override
+	{
+		// Cannot place a head at "no face" and from the bottom:
+		if ((a_BlockFace == BLOCK_FACE_NONE) || (a_BlockFace == BLOCK_FACE_BOTTOM))
+		{
+			return true;
+		}
+		AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, a_BlockFace);
+
+		// If the placed head is a wither, try to spawn the wither first:
+		if (a_EquippedItem.m_ItemDamage == E_META_HEAD_WITHER)
+		{
+			if (TrySpawnWitherAround(a_World, a_Player, a_BlockX, a_BlockY, a_BlockZ))
+			{
+				return true;
+			}
+			// Wither not created, proceed with regular head placement
+		}
+
+		return PlaceRegularHead(a_World, a_Player, a_EquippedItem, a_BlockX, a_BlockY, a_BlockZ, a_BlockFace);
+	}
+
+
+	/** Places a regular head block with no mob spawning checking. */
+	bool PlaceRegularHead(
+		cWorld & a_World, cPlayer & a_Player, const cItem & a_EquippedItem,
+		int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace
+	)
+	{
+		// Place the block:
+		if (!a_Player.PlaceBlock(a_BlockX, a_BlockY, a_BlockZ, E_BLOCK_HEAD, static_cast<NIBBLETYPE>(a_EquippedItem.m_ItemType)))
+		{
+			return false;
+		}
+
+		// Use a callback to set the properties of the mob head block entity:
+		class cCallback : public cBlockEntityCallback
+		{
+			cPlayer & m_Player;
+			eMobHeadType m_HeadType;
+			NIBBLETYPE m_BlockMeta;
+			
+			virtual bool Item(cBlockEntity * a_BlockEntity)
+			{
+				if (a_BlockEntity->GetBlockType() != E_BLOCK_HEAD)
+				{
+					return false;
+				}
+				cMobHeadEntity * MobHeadEntity = static_cast<cMobHeadEntity *>(a_BlockEntity);
+
+				int Rotation = 0;
+				if (m_BlockMeta == 1)
+				{
+					Rotation = FloorC(m_Player.GetYaw() * 16.0f / 360.0f + 0.5f) & 0x0f;
+				}
+
+				MobHeadEntity->SetType(m_HeadType);
+				MobHeadEntity->SetRotation(static_cast<eMobHeadRotation>(Rotation));
+				MobHeadEntity->GetWorld()->BroadcastBlockEntity(MobHeadEntity->GetPosX(), MobHeadEntity->GetPosY(), MobHeadEntity->GetPosZ());
+				return false;
+			}
+		
+		public:
+			cCallback (cPlayer & a_CBPlayer, eMobHeadType a_HeadType, NIBBLETYPE a_BlockMeta) :
+				m_Player(a_CBPlayer),
+				m_HeadType(a_HeadType),
+				m_BlockMeta(a_BlockMeta)
+			{}
+		};
+		cCallback Callback(a_Player, static_cast<eMobHeadType>(a_EquippedItem.m_ItemType), static_cast<NIBBLETYPE>(a_BlockFace));
+		a_World.DoWithBlockEntityAt(a_BlockX, a_BlockY, a_BlockZ, Callback);
+		return true;
+	}
+
+
+	/** Spawns a wither if the wither skull placed at the specified coords completes wither's spawning formula.
+	Returns true if the wither was created. */
+	bool TrySpawnWitherAround(
+		cWorld & a_World, cPlayer & a_Player,
+		int a_BlockX, int a_BlockY, int a_BlockZ
+	)
+	{
+		// No wither can be created at Y < 2 - not enough space for the formula:
+		if (a_BlockY < 2)
+		{
+			return false;
+		}
+
+		// Check for all relevant wither locations:
+		static const Vector3i RelCoords[] =
+		{
+			{ 0, 0,  0},
+			{ 1, 0,  0},
+			{-1, 0,  0},
+			{ 0, 0,  1},
+			{ 0, 0, -1},
+		};
+		for (size_t i = 0; i < ARRAYCOUNT(RelCoords); ++i)
+		{
+			if (TrySpawnWitherAt(
+				a_World, a_Player,
+				a_BlockX, a_BlockY, a_BlockZ,
+				RelCoords[i].x, RelCoords[i].z
+			))
+			{
+				return true;
+			}
+		}  // for i - Coords[]
+
+		return false;
+	}
+
+
+	/** Tries to spawn a wither at the specified offset from the placed head block.
+	PlacedHead coords are used to override the block query - at those coords the block is not queried from the world,
+	but assumed to be a head instead.
+	Offset is used to shift the image around the X and Z axis.
+	Returns true iff the wither was created successfully. */
+	bool TrySpawnWitherAt(
+		cWorld & a_World, cPlayer & a_Player,
+		int a_PlacedHeadX, int a_PlacedHeadY, int a_PlacedHeadZ,
+		int a_OffsetX, int a_OffsetZ
+	)
+	{
+		// Image for the wither at the X axis:
+		static const sSetBlock ImageWitherX[] =
+		{
+			{-1,  0, 0, E_BLOCK_HEAD, E_META_HEAD_WITHER},
+			{ 0,  0, 0, E_BLOCK_HEAD, E_META_HEAD_WITHER},
+			{ 1,  0, 0, E_BLOCK_HEAD, E_META_HEAD_WITHER},
+			{-1, -1, 0, E_BLOCK_SOULSAND, 0},
+			{ 0, -1, 0, E_BLOCK_SOULSAND, 0},
+			{ 1, -1, 0, E_BLOCK_SOULSAND, 0},
+			{-1, -2, 0, E_BLOCK_AIR,      0},
+			{ 0, -2, 0, E_BLOCK_SOULSAND, 0},
+			{ 1, -2, 0, E_BLOCK_AIR,      0},
+		};
+
+		// Image for the wither at the Z axis:
+		static const sSetBlock ImageWitherZ[] =
+		{
+			{ 0,  0, -1, E_BLOCK_HEAD, E_META_HEAD_WITHER},
+			{ 0,  0,  0, E_BLOCK_HEAD, E_META_HEAD_WITHER},
+			{ 0,  0,  1, E_BLOCK_HEAD, E_META_HEAD_WITHER},
+			{ 0, -1, -1, E_BLOCK_SOULSAND, 0},
+			{ 0, -1,  0, E_BLOCK_SOULSAND, 0},
+			{ 0, -1,  1, E_BLOCK_SOULSAND, 0},
+			{ 0, -2, -1, E_BLOCK_AIR,      0},
+			{ 0, -2,  0, E_BLOCK_SOULSAND, 0},
+			{ 0, -2,  1, E_BLOCK_AIR,      0},
+		};
+
+		// Try to spawn the wither from each image:
+		return (
+			TrySpawnWitherFromImage(
+				a_World, a_Player, ImageWitherX, ARRAYCOUNT(ImageWitherX),
+				a_PlacedHeadX, a_PlacedHeadY, a_PlacedHeadZ,
+				a_OffsetX, a_OffsetZ
+			) ||
+			TrySpawnWitherFromImage(
+				a_World, a_Player, ImageWitherZ, ARRAYCOUNT(ImageWitherZ),
+				a_PlacedHeadX, a_PlacedHeadY, a_PlacedHeadZ,
+				a_OffsetX, a_OffsetZ
+			)
+		);
+	}
+
+
+	/** Tries to spawn a wither from the specified image at the specified offset from the placed head block.
+	PlacedHead coords are used to override the block query - at those coords the block is not queried from the world,
+	but assumed to be a head instead.
+	Offset is used to shift the image around the X and Z axis.
+	Returns true iff the wither was created successfully. */
+	bool TrySpawnWitherFromImage(
+		cWorld & a_World, cPlayer & a_Player, const sSetBlock * a_Image, size_t a_ImageCount,
+		int a_PlacedHeadX, int a_PlacedHeadY, int a_PlacedHeadZ,
+		int a_OffsetX, int a_OffsetZ
+	)
+	{
+		// Check each block individually; simultaneously build the SetBlockVector for clearing the blocks:
+		sSetBlockVector AirBlocks;
+		AirBlocks.reserve(a_ImageCount);
+		for (size_t i = 0; i < a_ImageCount; i++)
+		{
+			// Get the absolute coords of the image:
+			int BlockX = a_PlacedHeadX + a_OffsetX + a_Image[i].m_RelX;
+			int BlockY = a_PlacedHeadY + a_Image[i].m_RelY;
+			int BlockZ = a_PlacedHeadZ + a_OffsetZ + a_Image[i].m_RelZ;
+
+			// If the query is for the placed head, short-circuit-evaluate it:
+			if ((BlockX == a_PlacedHeadX) && (BlockY == a_PlacedHeadY) && (BlockZ == a_PlacedHeadZ))
+			{
+				if ((a_Image[i].m_BlockType != E_BLOCK_HEAD) || (a_Image[i].m_BlockMeta != E_META_HEAD_WITHER))
+				{
+					return false;  // Didn't match
+				}
+				continue;  // Matched, continue checking the rest of the image
+			}
+
+			// Query the world block:
+			BLOCKTYPE BlockType;
+			NIBBLETYPE BlockMeta;
+			if (!a_World.GetBlockTypeMeta(BlockX, BlockY, BlockZ, BlockType, BlockMeta))
+			{
+				// Cannot query block, assume unloaded chunk, fail to spawn the wither
+				return false;
+			}
+
+			// Compare the world block:
+			if ((BlockType != a_Image[i].m_BlockType) || (BlockMeta != a_Image[i].m_BlockMeta))
+			{
+				return false;  // Didn't match
+			}
+			// Matched, continue checking
+		}  // for i - a_Image
+
+		// All image blocks matched, try place the wither:
+		if (!a_Player.PlaceBlocks(AirBlocks))
+		{
+			return false;
+		}
+
+		// Spawn the wither:
+		int BlockX = a_PlacedHeadX + a_OffsetX;
+		int BlockZ = a_PlacedHeadZ + a_OffsetZ;
+		a_World.SpawnMob(static_cast<double>(BlockX) + 0.5, a_PlacedHeadY - 2, static_cast<double>(BlockZ) + 0.5, mtWither);
+		AwardSpawnWitherAchievement(a_World, BlockX, a_PlacedHeadY - 2, BlockZ);
+		return true;
+	}
+
+
+	/** Awards the achievement to all players close to the specified point. */
+	void AwardSpawnWitherAchievement(cWorld & a_World, int a_BlockX, int a_BlockY, int a_BlockZ)
+	{
+		class cPlayerCallback : public cPlayerListCallback
+		{
+			Vector3f m_Pos;
+
+			virtual bool Item(cPlayer * a_Player)
+			{
+				// If player is close, award achievement:
+				double Dist = (a_Player->GetPosition() - m_Pos).Length();
+				if (Dist < 50.0)
+				{
+					a_Player->AwardAchievement(achSpawnWither);
+				}
+				return false;
+			}
+
+		public:
+			cPlayerCallback(const Vector3f & a_Pos) : m_Pos(a_Pos) {}
+		} PlayerCallback(Vector3f(static_cast<float>(a_BlockX), static_cast<float>(a_BlockY), static_cast<float>(a_BlockZ)));
+		a_World.ForEachPlayer(PlayerCallback);
+	}
+
+
 	virtual bool IsPlaceable(void) override
 	{
 		return true;
diff --git a/src/Items/ItemPumpkin.h b/src/Items/ItemPumpkin.h
new file mode 100644
index 000000000..fa00179d3
--- /dev/null
+++ b/src/Items/ItemPumpkin.h
@@ -0,0 +1,156 @@
+
+// ItemPumpkin.h
+
+// Declares the cItemPumpkinHandler class representing the pumpkin block in its item form
+
+
+
+
+
+#pragma once
+
+#include "ItemHandler.h"
+
+
+
+
+
+class cItemPumpkinHandler:
+	public cItemHandler
+{
+	typedef cItemHandler super;
+
+public:
+	cItemPumpkinHandler(void):
+		super(E_BLOCK_PUMPKIN)
+	{
+	}
+
+
+	virtual bool OnPlayerPlace(
+		cWorld & a_World, cPlayer & a_Player, const cItem & a_EquippedItem,
+		int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace,
+		int a_CursorX, int a_CursorY, int a_CursorZ
+	) override
+	{
+		// First try spawning a snow golem or an iron golem:
+		int PlacedBlockX = a_BlockX;
+		int PlacedBlockY = a_BlockY;
+		int PlacedBlockZ = a_BlockZ;
+		AddFaceDirection(PlacedBlockX, PlacedBlockY, PlacedBlockZ, a_BlockFace);
+		if (TrySpawnGolem(a_World, a_Player, PlacedBlockX, PlacedBlockY, PlacedBlockZ))
+		{
+			// The client thinks that they placed the pumpkin, let them know it's been replaced:
+			a_Player.SendBlocksAround(PlacedBlockX, PlacedBlockY, PlacedBlockZ);
+			return true;
+		}
+
+		// No golem at these coords, place the block normally:
+		return super::OnPlayerPlace(a_World, a_Player, a_EquippedItem, a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, a_CursorX, a_CursorY, a_CursorZ);
+	}
+
+
+	/** Spawns a snow / iron golem if the shape matches the recipe, supposing that the block placed at the specified coords is a pumpkin.
+	Returns true if the golem blocks are removed (for spawning), false if the recipe is not matched. */
+	bool TrySpawnGolem(cWorld & a_World, cPlayer & a_Player, int a_BlockX, int a_BlockY, int a_BlockZ)
+	{
+		// A golem can't form with a pumpkin below level 2 or above level 255
+		if ((a_BlockY < 2) || (a_BlockY >= cChunkDef::Height))
+		{
+			return false;
+		}
+
+		// Decide which golem to try spawning based on the block below the placed pumpkin:
+		switch (a_World.GetBlock(a_BlockX, a_BlockY - 1, a_BlockZ))
+		{
+			case E_BLOCK_SNOW_BLOCK: return TrySpawnSnowGolem(a_World, a_Player, a_BlockX, a_BlockY, a_BlockZ);
+			case E_BLOCK_IRON_BLOCK: return TrySpawnIronGolem(a_World, a_Player, a_BlockX, a_BlockY, a_BlockZ);
+			default:
+			{
+				// No golem here
+				return false;
+			}
+		}
+	}
+
+
+	/** Spawns a snow golem if the shape matches the recipe, supposing that the block placed at the specified coords is a pumpkin.
+	Returns true if the golem blocks are removed (for spawning), false if the recipe is not matched.
+	Assumes that the block below the specified block has already been checked and is a snow block. */
+	bool TrySpawnSnowGolem(cWorld & a_World, cPlayer & a_Player, int a_BlockX, int a_BlockY, int a_BlockZ)
+	{
+		// Need one more snow block 2 blocks below the pumpkin:
+		if (a_World.GetBlock(a_BlockX, a_BlockY - 2, a_BlockZ) != E_BLOCK_SNOW_BLOCK)
+		{
+			return false;
+		}
+
+		// Try to place air blocks where the original recipe blocks were:
+		sSetBlockVector AirBlocks;
+		AirBlocks.emplace_back(a_BlockX, a_BlockY,     a_BlockZ, E_BLOCK_AIR, 0);  // Head
+		AirBlocks.emplace_back(a_BlockX, a_BlockY - 1, a_BlockZ, E_BLOCK_AIR, 0);  // Torso
+		AirBlocks.emplace_back(a_BlockX, a_BlockY - 2, a_BlockZ, E_BLOCK_AIR, 0);  // Legs
+		if (!a_Player.PlaceBlocks(AirBlocks))
+		{
+			return false;
+		}
+
+		// Spawn the golem:
+		a_World.SpawnMob(static_cast<double>(a_BlockX) + 0.5, a_BlockY - 2, static_cast<double>(a_BlockZ) + 0.5, mtSnowGolem);
+		return true;
+	}
+
+
+	/** Spawns an iron golem if the shape matches the recipe, supposing that the block placed at the specified coords is a pumpkin.
+	Returns true if the golem blocks are removed (for spawning), false if the recipe is not matched.
+	Assumes that the block below the specified block has already been checked and is an iron block. */
+	bool TrySpawnIronGolem(cWorld & a_World, cPlayer & a_Player, int a_BlockX, int a_BlockY, int a_BlockZ)
+	{
+		// Need one more iron block 2 blocks below the pumpkin:
+		if (a_World.GetBlock(a_BlockX, a_BlockY - 2, a_BlockZ) != E_BLOCK_IRON_BLOCK)
+		{
+			return false;
+		}
+
+		// Check the two arm directions (X, Z) using a loop over two sets of offset vectors:
+		static const Vector3i ArmOffsets[] =
+		{
+			{1, 0, 0},
+			{0, 0, 1},
+		};
+		for (size_t i = 0; i < ARRAYCOUNT(ArmOffsets); i++)
+		{
+			// If the arm blocks don't match, bail out of this loop repetition:
+			if (
+				(a_World.GetBlock(a_BlockX + ArmOffsets[i].x, a_BlockY - 1, a_BlockZ + ArmOffsets[i].z) != E_BLOCK_IRON_BLOCK) ||
+				(a_World.GetBlock(a_BlockX - ArmOffsets[i].x, a_BlockY - 1, a_BlockZ - ArmOffsets[i].z) != E_BLOCK_IRON_BLOCK)
+			)
+			{
+				continue;
+			}
+
+			// Try to place air blocks where the original recipe blocks were:
+			sSetBlockVector AirBlocks;
+			AirBlocks.emplace_back(a_BlockX,                   a_BlockY,     a_BlockZ,                   E_BLOCK_AIR, 0);  // Head
+			AirBlocks.emplace_back(a_BlockX,                   a_BlockY - 1, a_BlockZ,                   E_BLOCK_AIR, 0);  // Torso
+			AirBlocks.emplace_back(a_BlockX,                   a_BlockY - 2, a_BlockZ,                   E_BLOCK_AIR, 0);  // Legs
+			AirBlocks.emplace_back(a_BlockX + ArmOffsets[i].x, a_BlockY - 1, a_BlockZ + ArmOffsets[i].z, E_BLOCK_AIR, 0);  // Arm
+			AirBlocks.emplace_back(a_BlockX - ArmOffsets[i].x, a_BlockY - 1, a_BlockZ - ArmOffsets[i].z, E_BLOCK_AIR, 0);  // Arm
+			if (!a_Player.PlaceBlocks(AirBlocks))
+			{
+				return false;
+			}
+
+			// Spawn the golem:
+			a_World.SpawnMob(static_cast<double>(a_BlockX) + 0.5, a_BlockY - 2, static_cast<double>(a_BlockZ) + 0.5, mtIronGolem);
+			return true;
+		}  // for i - ArmOffsets[]
+
+		// Neither arm offset matched, this thing is not a complete golem
+		return false;
+	}
+};
+
+
+
+
diff --git a/src/Items/ItemRedstoneDust.h b/src/Items/ItemRedstoneDust.h
index a2289239c..6d5fb521f 100644
--- a/src/Items/ItemRedstoneDust.h
+++ b/src/Items/ItemRedstoneDust.h
@@ -27,7 +27,20 @@ public:
 		BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
 	) override
 	{
-		if (!cBlockInfo::FullyOccupiesVoxel(a_World->GetBlock(a_BlockX, a_BlockY - 1, a_BlockZ)))  // Some solid blocks, such as cocoa beans, are not suitable for dust
+		// Check if coords are out of range:
+		if ((a_BlockY <= 0) || (a_BlockY >= cChunkDef::Height))
+		{
+			return false;
+		}
+
+		// Check the block below, if it supports dust on top of it:
+		BLOCKTYPE BlockType;
+		NIBBLETYPE BlockMeta;
+		if (!a_World->GetBlockTypeMeta(a_BlockX, a_BlockY - 1, a_BlockZ, BlockType, BlockMeta))
+		{
+			return false;
+		}
+		if (!IsBlockTypeUnderSuitable(BlockType, BlockMeta))
 		{
 			return false;
 		}
@@ -36,6 +49,28 @@ public:
 		a_BlockMeta = 0;
 		return true;
 	}
+
+
+	/** Returns true if the specified block type / meta is suitable to have redstone dust on top of it. */
+	static bool IsBlockTypeUnderSuitable(BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)
+	{
+		if (cBlockInfo::FullyOccupiesVoxel(a_BlockType))
+		{
+			return true;
+		}
+
+		switch (a_BlockType)
+		{
+			case E_BLOCK_NEW_STONE_SLAB:
+			case E_BLOCK_WOODEN_SLAB:
+			case E_BLOCK_STONE_SLAB:
+			{
+				// Slabs can support redstone if they're upside down:
+				return ((a_BlockMeta & 0x08) != 0);
+			}
+		}
+		return false;
+	}
 } ;
 
 
diff --git a/src/Items/ItemSign.h b/src/Items/ItemSign.h
index 0fa0fa0be..dabbdbba1 100644
--- a/src/Items/ItemSign.h
+++ b/src/Items/ItemSign.h
@@ -13,13 +13,33 @@
 class cItemSignHandler :
 	public cItemHandler
 {
+	typedef cItemHandler super;
 public:
 	cItemSignHandler(int a_ItemType) :
-		cItemHandler(a_ItemType)
+		super(a_ItemType)
 	{
 	}
 
 
+	virtual bool OnPlayerPlace(
+		cWorld & a_World, cPlayer & a_Player, const cItem & a_EquippedItem,
+		int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace,
+		int a_CursorX, int a_CursorY, int a_CursorZ
+	)
+	{
+		// If the regular placement doesn't work, do no further processing:
+		if (!super::OnPlayerPlace(a_World, a_Player, a_EquippedItem, a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, a_CursorX, a_CursorY, a_CursorZ))
+		{
+			return false;
+		}
+
+		// After successfully placing the sign, open the sign editor for the player:
+		AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, a_BlockFace);
+		a_Player.GetClientHandle()->SendEditSign(a_BlockX, a_BlockY, a_BlockZ);
+		return true;
+	}
+
+
 	virtual bool IsPlaceable(void) override
 	{
 		return true;
diff --git a/src/Items/ItemSlab.h b/src/Items/ItemSlab.h
new file mode 100644
index 000000000..1b68b9d0c
--- /dev/null
+++ b/src/Items/ItemSlab.h
@@ -0,0 +1,93 @@
+
+// ItemSlab.h
+
+// Declares the cItemSlabHandler responsible for handling slabs, when in their item form.
+
+
+
+
+
+#pragma once
+
+#include "ItemHandler.h"
+#include "../Blocks/BlockSlab.h"
+
+
+
+
+
+class cItemSlabHandler:
+	public cItemHandler
+{
+	typedef cItemHandler super;
+
+public:
+
+	/** Creates a new handler for the specified slab item type.
+	Sets the handler to use the specified doubleslab block type for combining self into doubleslabs. */
+	cItemSlabHandler(int a_ItemType, BLOCKTYPE a_DoubleSlabBlockType):
+		super(a_ItemType),
+		m_DoubleSlabBlockType(a_DoubleSlabBlockType)
+	{
+	}
+
+
+	// cItemHandler overrides:
+	virtual bool OnPlayerPlace(
+		cWorld & a_World, cPlayer & a_Player, const cItem & a_EquippedItem,
+		int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace,
+		int a_CursorX, int a_CursorY, int a_CursorZ
+	) override
+	{
+		// Special slab handling - placing a slab onto another slab produces a dblslab instead:
+		BLOCKTYPE ClickedBlockType;
+		NIBBLETYPE ClickedBlockMeta;
+		a_World.GetBlockTypeMeta(a_BlockX, a_BlockY, a_BlockZ, ClickedBlockType, ClickedBlockMeta);
+		if (
+			(ClickedBlockType == m_ItemType) &&                // Placing the same slab material
+			(ClickedBlockMeta == a_EquippedItem.m_ItemDamage)  // Placing the same slab sub-kind (and existing slab is single)
+		)
+		{
+			// If clicking the top side of a bottom-half slab, combine into a doubleslab:
+			if (
+				(a_BlockFace == BLOCK_FACE_TOP) &&
+				((ClickedBlockMeta & 0x08) == 0)
+			)
+			{
+				return a_Player.PlaceBlock(a_BlockX, a_BlockY, a_BlockZ, m_DoubleSlabBlockType, ClickedBlockMeta & 0x07);
+			}
+
+			// If clicking the bottom side of a top-half slab, combine into a doubleslab:
+			if (
+				(a_BlockFace == BLOCK_FACE_BOTTOM) &&
+				((ClickedBlockMeta & 0x08) != 0)
+			)
+			{
+				return a_Player.PlaceBlock(a_BlockX, a_BlockY, a_BlockZ, m_DoubleSlabBlockType, ClickedBlockMeta & 0x07);
+			}
+		}
+
+		// The slabs didn't combine, use the default handler to place the slab:
+		bool res = super::OnPlayerPlace(a_World, a_Player, a_EquippedItem, a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, a_CursorX, a_CursorY, a_CursorZ);
+
+		/*
+		The client has a bug when a slab replaces snow and there's a slab above it.
+		The client then combines the slab above, rather than replacing the snow.
+		We send the block above the currently placed block back to the client to fix the bug.
+		Ref.: http://forum.mc-server.org/showthread.php?tid=434&pid=17388#pid17388
+		*/
+		if ((a_BlockFace == BLOCK_FACE_TOP) && (a_BlockY < cChunkDef::Height - 1))
+		{
+			a_Player.SendBlocksAround(a_BlockX, a_BlockY + 1, a_BlockZ, 1);
+		}
+		return res;
+	}
+
+protected:
+	/** The block type to use when the slab combines into a doubleslab block. */
+	BLOCKTYPE m_DoubleSlabBlockType;
+};
+
+
+
+
diff --git a/src/Protocol/Protocol17x.cpp b/src/Protocol/Protocol17x.cpp
index 1e33ec433..34103ea5a 100644
--- a/src/Protocol/Protocol17x.cpp
+++ b/src/Protocol/Protocol17x.cpp
@@ -228,8 +228,8 @@ void cProtocol172::SendBlockChanges(int a_ChunkX, int a_ChunkZ, const sSetBlockV
 	Pkt.WriteInt((int)a_Changes.size() * 4);
 	for (sSetBlockVector::const_iterator itr = a_Changes.begin(), end = a_Changes.end(); itr != end; ++itr)
 	{
-		unsigned int Coords = itr->y | (itr->z << 8) | (itr->x << 12);
-		unsigned int Blocks = itr->BlockMeta | (itr->BlockType << 4);
+		unsigned int Coords = itr->m_RelY | (itr->m_RelZ << 8) | (itr->m_RelX << 12);
+		unsigned int Blocks = itr->m_BlockMeta | (itr->m_BlockType << 4);
 		Pkt.WriteInt((Coords << 16) | Blocks);
 	}  // for itr - a_Changes[]
 }
diff --git a/src/Protocol/Protocol18x.cpp b/src/Protocol/Protocol18x.cpp
index 1a13f4f7c..72827ac47 100644
--- a/src/Protocol/Protocol18x.cpp
+++ b/src/Protocol/Protocol18x.cpp
@@ -207,9 +207,9 @@ void cProtocol180::SendBlockChanges(int a_ChunkX, int a_ChunkZ, const sSetBlockV
 	Pkt.WriteVarInt((UInt32)a_Changes.size());
 	for (sSetBlockVector::const_iterator itr = a_Changes.begin(), end = a_Changes.end(); itr != end; ++itr)
 	{
-		short Coords = (short) (itr->y | (itr->z << 8) | (itr->x << 12));
+		short Coords = (short) (itr->m_RelY | (itr->m_RelZ << 8) | (itr->m_RelX << 12));
 		Pkt.WriteShort(Coords);
-		Pkt.WriteVarInt((itr->BlockType & 0xFFF) << 4 | (itr->BlockMeta & 0xF));
+		Pkt.WriteVarInt((itr->m_BlockType & 0xFFF) << 4 | (itr->m_BlockMeta & 0xF));
 	}  // for itr - a_Changes[]
 }
 
diff --git a/src/Vector3.h b/src/Vector3.h
index 1e4a1f5d9..1f3f6b955 100644
--- a/src/Vector3.h
+++ b/src/Vector3.h
@@ -307,6 +307,22 @@ public:
 		return (a_X - x) / (a_OtherEnd.x - x);
 	}
 
+	/** Rotates the vector 90 degrees clockwise around the vertical axis.
+	Note that this is specific to minecraft's axis ordering, which is X+ left, Z+ down. */
+	inline void TurnCW(void)
+	{
+		std::swap(x, z);
+		x = -x;
+	}
+
+	/** Rotates the vector 90 degrees counterclockwise around the vertical axis.
+	Note that this is specific to minecraft's axis ordering, which is X+ left, Z+ down. */
+	inline void TurnCCW(void)
+	{
+		std::swap(x, z);
+		z = -z;
+	}
+
 	/** The max difference between two coords for which the coords are assumed equal. */
 	static const double EPS;
 
diff --git a/src/World.cpp b/src/World.cpp
index ae739a2c3..c08b44f77 100644
--- a/src/World.cpp
+++ b/src/World.cpp
@@ -1463,7 +1463,7 @@ void cWorld::GrowTreeImage(const sSetBlockVector & a_Blocks)
 	sSetBlockVector b2;
 	for (sSetBlockVector::const_iterator itr = a_Blocks.begin(); itr != a_Blocks.end(); ++itr)
 	{
-		if (itr->BlockType == E_BLOCK_LOG)
+		if (itr->m_BlockType == E_BLOCK_LOG)
 		{
 			b2.push_back(*itr);
 		}
@@ -1478,7 +1478,7 @@ void cWorld::GrowTreeImage(const sSetBlockVector & a_Blocks)
 	// Check that at each log's coord there's an block allowed to be overwritten:
 	for (sSetBlockVector::const_iterator itr = b2.begin(); itr != b2.end(); ++itr)
 	{
-		switch (itr->BlockType)
+		switch (itr->m_BlockType)
 		{
 			CASE_TREE_ALLOWED_BLOCKS:
 			{
@@ -1926,6 +1926,15 @@ void cWorld::SpawnPrimedTNT(double a_X, double a_Y, double a_Z, int a_FuseTicks,
 
 
 
+void cWorld::SetBlocks(const sSetBlockVector & a_Blocks)
+{
+	m_ChunkMap->SetBlocks(a_Blocks);
+}
+
+
+
+
+
 void cWorld::ReplaceBlocks(const sSetBlockVector & a_Blocks, BLOCKTYPE a_FilterBlockType)
 {
 	m_ChunkMap->ReplaceBlocks(a_Blocks, a_FilterBlockType);
diff --git a/src/World.h b/src/World.h
index 4f24280a4..2ee33375f 100644
--- a/src/World.h
+++ b/src/World.h
@@ -491,6 +491,11 @@ public:
 
 	// tolua_end
 
+	/** Performs the specified single-block set operations simultaneously, as if SetBlock() was called for each item.
+	Is more efficient than calling SetBlock() multiple times.
+	If the chunk for any of the blocks is not loaded, the set operation is ignored silently. */
+	void SetBlocks(const sSetBlockVector & a_Blocks);
+
 	/** Replaces world blocks with a_Blocks, if they are of type a_FilterBlockType */
 	void ReplaceBlocks(const sSetBlockVector & a_Blocks, BLOCKTYPE a_FilterBlockType);