diff --git a/include/PolyVox/PagedVolume.h b/include/PolyVox/PagedVolume.h
index 852ebe60..105e50df 100644
--- a/include/PolyVox/PagedVolume.h
+++ b/include/PolyVox/PagedVolume.h
@@ -285,17 +285,36 @@ namespace PolyVox
 
 		ChunkKey posToChunkKey(int32_t iXPos, int32_t iYPos, int32_t iZPos) const
 		{
+			int32_t iBlockX = iXPos >> m_uChunkSideLengthPower;
+			int32_t iBlockY = iYPos >> m_uChunkSideLengthPower;
+			int32_t iBlockZ = iZPos >> m_uChunkSideLengthPower;
+
+			int16_t iBlockXAsInt16 = static_cast<int16_t>(iBlockX);
+			int16_t iBlockYAsInt16 = static_cast<int16_t>(iBlockY);
+			int16_t iBlockZAsInt16 = static_cast<int16_t>(iBlockZ);
+
+			uint16_t uBlockXAsUint16 = reinterpret_cast<uint16_t&>(iBlockXAsInt16);
+			uint16_t uBlockYAsUint16 = reinterpret_cast<uint16_t&>(iBlockYAsInt16);
+			uint16_t uBlockZAsUint16 = reinterpret_cast<uint16_t&>(iBlockZAsInt16);
+
+			uint64_t uBlockXAsUint64 = static_cast<uint64_t>(uBlockXAsUint16);
+			uint64_t uBlockYAsUint64 = static_cast<uint64_t>(uBlockYAsUint16);
+			uint64_t uBlockZAsUint64 = static_cast<uint64_t>(uBlockZAsUint16);
+
+			uBlockXAsUint64 = uBlockXAsUint64 << 32;
+			uBlockYAsUint64 = uBlockYAsUint64 << 16;
+
 			// Bit-shifting of signed integer values has various issues with undefined or implementation-defined behaviour.
 			// Therefore we cast to unsigned to avoid these (we only care about the bit pattern anyway, not the actual value).
-			const ChunkKey uXPos = static_cast<ChunkKey>(iXPos);
+			/*const ChunkKey uXPos = static_cast<ChunkKey>(iXPos);
 			const ChunkKey uYPos = static_cast<ChunkKey>(iYPos);
 			const ChunkKey uZPos = static_cast<ChunkKey>(iZPos);
 			
 			const ChunkKey xKey = ((uXPos >> m_uChunkSideLengthPower) & 0x3FF) << 20;
 			const ChunkKey yKey = ((uYPos >> m_uChunkSideLengthPower) & 0x3FF) << 10;
-			const ChunkKey zKey = ((uZPos >> m_uChunkSideLengthPower) & 0x3FF);
+			const ChunkKey zKey = ((uZPos >> m_uChunkSideLengthPower) & 0x3FF);*/
 			
-			const ChunkKey key = 0x80000000 | xKey | yKey | zKey;
+			const ChunkKey key = 0xFFFF000000000000 | uBlockXAsUint64 | uBlockYAsUint64 | uBlockZAsUint64;
 			
 			return key;
 		}
diff --git a/include/PolyVox/PagedVolume.inl b/include/PolyVox/PagedVolume.inl
index b93fc2de..8d80c0f1 100644
--- a/include/PolyVox/PagedVolume.inl
+++ b/include/PolyVox/PagedVolume.inl
@@ -293,14 +293,33 @@ namespace PolyVox
 		// If we still haven't found the chunk then it's time to create a new one and page it in from disk.
 		if (!pChunk)
 		{
-			const int32_t uChunkX = (iKeyAsInt32 >> 20) & 0x3FF;
+			uint64_t uBlockXAsUint64 = iKeyAsInt32;
+			uint64_t uBlockYAsUint64 = iKeyAsInt32;
+			uint64_t uBlockZAsUint64 = iKeyAsInt32;
+
+			uBlockXAsUint64 = uBlockXAsUint64 >> 32;
+			uBlockYAsUint64 = uBlockYAsUint64 >> 16;
+
+			uBlockXAsUint64 = uBlockXAsUint64 & 0xFFFF;
+			uBlockYAsUint64 = uBlockYAsUint64 & 0xFFFF;
+			uBlockZAsUint64 = uBlockZAsUint64 & 0xFFFF;
+
+			uint16_t uBlockXAsUint16 = static_cast<uint16_t>(uBlockXAsUint64);
+			uint16_t uBlockYAsUint16 = static_cast<uint16_t>(uBlockYAsUint64);
+			uint16_t uBlockZAsUint16 = static_cast<uint16_t>(uBlockZAsUint64);
+
+			int16_t uBlockXAsInt16 = reinterpret_cast<int16_t&>(uBlockXAsUint16);
+			int16_t uBlockYAsInt16 = reinterpret_cast<int16_t&>(uBlockYAsUint16);
+			int16_t uBlockZAsInt16 = reinterpret_cast<int16_t&>(uBlockZAsUint16);
+
+			/*const int32_t uChunkX = (iKeyAsInt32 >> 20) & 0x3FF;
 			const int32_t uChunkY = (iKeyAsInt32 >> 10) & 0x3FF;
-			const int32_t uChunkZ = (iKeyAsInt32)       & 0x3FF;
+			const int32_t uChunkZ = (iKeyAsInt32)       & 0x3FF;*/
 			// The chunk was not found so we will create a new one.
 			/*ChunkKeyConverter converter;
 			converter.i = key;*/
 			//ChunkKey realKey = force_cast<ChunkKey>(iKeyAsInt32);
-			Vector3DInt32 v3dChunkPos(uChunkX, uChunkY, uChunkZ);
+			Vector3DInt32 v3dChunkPos(uBlockXAsInt16, uBlockYAsInt16, uBlockZAsInt16);
 			pChunk = new PagedVolume<VoxelType>::Chunk(v3dChunkPos, m_uChunkSideLength, m_pPager);
 			pChunk->m_uChunkLastAccessed = ++m_uTimestamper; // Important, as we may soon delete the oldest chunk
 			m_mapChunks.insert(std::make_pair(iKeyAsInt32, std::unique_ptr<Chunk>(pChunk)));