Drastically reduced memory usage.

include/RegionGeometry.h

@@ -37,6 +37,20 @@ namespace PolyVox
 		IndexedSurfacePatch* m_patchSingleMaterial;
 		IndexedSurfacePatch* m_patchMultiMaterial;
 
+		long int getSizeInBytes(void)
+		{
+			long int size = sizeof(RegionGeometry);
+			if(m_patchSingleMaterial)
+			{
+				size += m_patchSingleMaterial->getSizeInBytes();
+			}
+			if(m_patchMultiMaterial)
+			{
+				size += m_patchMultiMaterial->getSizeInBytes();
+			}
+			return size;
+		}
+
 	};	
 }