diff --git a/Tools/QtBiomeVisualiser/QtChunk.h b/Tools/QtBiomeVisualiser/QtChunk.h
@@ -18,29 +18,23 @@ class Chunk
 	/** Returns true iff the chunk data is valid - loaded or generated. */
 	bool isValid(void) const { return m_IsValid; }

-	/** Returns the image of the chunk's biomes. Assumes that the chunk is valid. */
-	const uchar * getImage(void) const;
-
 	/** Sets the biomes to m_Biomes and renders them into m_Image. */
 	void setBiomes(const cChunkDef::BiomeMap & a_Biomes);

 	/** Returns the biome at the specified relative coords, or biInvalidBiome if not valid.
 	Coords must be valid inside this chunk. */
 	EMCSBiome getBiome(int a_RelX, int a_RelZ);

+	/** Returns the raw biome data for this chunk. */
+	const short * getBiomes(void) const { return m_Biomes; }
+
 protected:
 	/** Flag that specifies if the chunk data is valid - loaded or generated. */
 	bool m_IsValid;

-	/** Cached rendered image of this chunk's biomes. Updated in render(). */
-	Image m_Image;
-
-	/** Biomes comprising the chunk, in the X + 16 * Z ordering. */
-	cChunkDef::BiomeMap m_Biomes;
-
-
-	/** Renders biomes from m_Biomes into m_Image. */
-	void renderBiomes();
+	/** Biomes comprising the chunk, in the X + 16 * Z ordering.
+	Typed as short to save on memory, converted automatically when needed. */
+	short m_Biomes[16 * 16];
 };

 typedef std::shared_ptr<Chunk> ChunkPtr;
diff --git a/Tools/QtBiomeVisualiser/Region.h b/Tools/QtBiomeVisualiser/Region.h
@@ -30,6 +30,8 @@ class Region
 	static void chunkToRegion(int a_ChunkX, int a_ChunkZ, int & a_RegionX, int & a_RegionZ);

 protected:
+	friend class RegionLoader;
+

 	Chunk m_Chunks[32 * 32];

diff --git a/Tools/QtBiomeVisualiser/RegionLoader.cpp b/Tools/QtBiomeVisualiser/RegionLoader.cpp
@@ -29,6 +29,8 @@ void RegionLoader::run()
 			m_ChunkSource->getChunkBiomes(m_RegionX * 32 + x, m_RegionZ * 32 + z, m_Region->getRelChunk(x, z));
 		}
 	}
+	m_Region->m_IsValid = true;
+
 	emit loaded(m_RegionX, m_RegionZ);
 }