diff --git a/src/WorldStorage/NBTChunkSerializer.cpp b/src/WorldStorage/NBTChunkSerializer.cpp
index 3c9da6de7..08ed893f5 100644
--- a/src/WorldStorage/NBTChunkSerializer.cpp
+++ b/src/WorldStorage/NBTChunkSerializer.cpp
@@ -81,6 +81,18 @@ void cNBTChunkSerializer::Finish(void)
 		memset(m_BlockLight,    0, sizeof(m_BlockLight));
 		memset(m_BlockSkyLight, 0, sizeof(m_BlockSkyLight));
 	}
+
+	// Check if "Entity" and "TileEntities" lists exists. MCEdit requires this.
+	if (!m_HasHadEntity)
+	{
+		m_Writer.BeginList("Entities", TAG_Compound);
+		m_Writer.EndList();
+	}
+	if (!m_HasHadBlockEntity)
+	{
+		m_Writer.BeginList("TileEntities", TAG_Compound);
+		m_Writer.EndList();
+	}
 }
 
 
@@ -765,6 +777,22 @@ void cNBTChunkSerializer::LightIsValid(bool a_IsLightValid)
 
 
 
+void cNBTChunkSerializer::HeightMap(const cChunkDef::HeightMap * a_HeightMap)
+{
+	for (int RelX = 0; RelX < cChunkDef::Width; RelX++)
+	{
+		for (int RelZ = 0; RelZ < cChunkDef::Width; RelZ++)
+		{
+			int Height = cChunkDef::GetHeight(*a_HeightMap, RelX, RelZ);
+			m_VanillaHeightMap[(RelZ << 4) | RelX] = Height;
+		}
+	}
+}
+
+
+
+
+
 void cNBTChunkSerializer::BiomeData(const cChunkDef::BiomeMap * a_BiomeMap)
 {
 	memcpy(m_Biomes, a_BiomeMap, sizeof(m_Biomes));
diff --git a/src/WorldStorage/NBTChunkSerializer.h b/src/WorldStorage/NBTChunkSerializer.h
index 4c229a65c..5ffab8cc5 100644
--- a/src/WorldStorage/NBTChunkSerializer.h
+++ b/src/WorldStorage/NBTChunkSerializer.h
@@ -59,6 +59,7 @@ class cNBTChunkSerializer :
 public:
 	cChunkDef::BiomeMap m_Biomes;
 	unsigned char m_VanillaBiomes[cChunkDef::Width * cChunkDef::Width];
+	int m_VanillaHeightMap[cChunkDef::Width * cChunkDef::Width];
 	bool m_BiomesAreValid;
 
 
@@ -125,6 +126,7 @@ protected:
 	
 	// cChunkDataSeparateCollector overrides:
 	virtual void LightIsValid(bool a_IsLightValid) override;
+	virtual void HeightMap(const cChunkDef::HeightMap * a_HeightMap) override;
 	virtual void BiomeData(const cChunkDef::BiomeMap * a_BiomeMap) override;
 	virtual void Entity(cEntity * a_Entity) override;
 	virtual void BlockEntity(cBlockEntity * a_Entity) override;
diff --git a/src/WorldStorage/WSSAnvil.cpp b/src/WorldStorage/WSSAnvil.cpp
index be526e74e..bd814e2c7 100644
--- a/src/WorldStorage/WSSAnvil.cpp
+++ b/src/WorldStorage/WSSAnvil.cpp
@@ -51,6 +51,7 @@
 #include "../Entities/ItemFrame.h"
 
 #include "../Protocol/MojangAPI.h"
+#include "Server.h"
 
 
 
@@ -96,10 +97,26 @@ cWSSAnvil::cWSSAnvil(cWorld * a_World, int a_CompressionFactor) :
 	if (!cFile::Exists(fnam))
 	{
 		cFastNBTWriter Writer;
-		Writer.BeginCompound("");
-		Writer.AddInt("SpawnX", (int)(a_World->GetSpawnX()));
-		Writer.AddInt("SpawnY", (int)(a_World->GetSpawnY()));
-		Writer.AddInt("SpawnZ", (int)(a_World->GetSpawnZ()));
+		Writer.BeginCompound("Data");
+		Writer.AddByte("allowCommands", 1);
+		Writer.AddByte("Difficulty", 2);
+		Writer.AddByte("hardcore", cRoot::Get()->GetServer()->IsHardcore() ? 1 : 0);
+		Writer.AddByte("initialized", 1);
+		Writer.AddByte("MapFeatures", 1);
+		Writer.AddByte("raining", a_World->IsWeatherRain() ? 1 : 0);
+		Writer.AddByte("thundering", a_World->IsWeatherStorm() ? 1 : 0);
+		Writer.AddInt("GameType", (int)a_World->GetGameMode());
+		Writer.AddInt("generatorVersion", 1);
+		Writer.AddInt("SpawnX", (int)a_World->GetSpawnX());
+		Writer.AddInt("SpawnY", (int)a_World->GetSpawnY());
+		Writer.AddInt("SpawnZ", (int)a_World->GetSpawnZ());
+		Writer.AddInt("version", 19133);
+		Writer.AddLong("DayTime", (Int64)a_World->GetTimeOfDay());
+		Writer.AddLong("Time", a_World->GetWorldAge());
+		Writer.AddLong("SizeOnDisk", 0);
+		Writer.AddString("generatorName", "default");
+		Writer.AddString("generatorOptions", "");
+		Writer.AddString("LevelName", a_World->GetName());
 		Writer.EndCompound();
 		Writer.Finish();
 		
@@ -440,6 +457,7 @@ bool cWSSAnvil::SaveChunkToNBT(const cChunkCoords & a_Chunk, cFastNBTWriter & a_
 	a_Writer.BeginCompound("Level");
 	a_Writer.AddInt("xPos", a_Chunk.m_ChunkX);
 	a_Writer.AddInt("zPos", a_Chunk.m_ChunkZ);
+
 	cNBTChunkSerializer Serializer(a_Writer);
 	if (!m_World->GetChunkData(a_Chunk.m_ChunkX, a_Chunk.m_ChunkZ, Serializer))
 	{
@@ -454,7 +472,10 @@ bool cWSSAnvil::SaveChunkToNBT(const cChunkCoords & a_Chunk, cFastNBTWriter & a_
 		a_Writer.AddByteArray("Biomes",    (const char *)(Serializer.m_VanillaBiomes), ARRAYCOUNT(Serializer.m_VanillaBiomes));
 		a_Writer.AddIntArray ("MCSBiomes", (const int *)(Serializer.m_Biomes),         ARRAYCOUNT(Serializer.m_Biomes));
 	}
-	
+
+	// Save heightmap (Vanilla require this):
+	a_Writer.AddIntArray("HeightMap", (const int *)Serializer.m_VanillaHeightMap, ARRAYCOUNT(Serializer.m_VanillaHeightMap));
+
 	// Save blockdata:
 	a_Writer.BeginList("Sections", TAG_Compound);
 	size_t SliceSizeBlock  = cChunkDef::Width * cChunkDef::Width * 16;
@@ -485,6 +506,9 @@ bool cWSSAnvil::SaveChunkToNBT(const cChunkCoords & a_Chunk, cFastNBTWriter & a_
 	{
 		a_Writer.AddByte("MCSIsLightValid", 1);
 	}
+
+	// Save the world age to the chunk data. Required by vanilla and mcedit.
+	a_Writer.AddLong("LastUpdate", m_World->GetWorldAge());
 	
 	// Store the flag that the chunk has all the ores, trees, dungeons etc. MCS chunks are always complete.
 	a_Writer.AddByte("TerrainPopulated", 1);