diff --git a/library/PolyVoxCore/include/PolyVoxCore/CubicSurfaceExtractor.inl b/library/PolyVoxCore/include/PolyVoxCore/CubicSurfaceExtractor.inl
index c9cff506..7d8e5206 100644
--- a/library/PolyVoxCore/include/PolyVoxCore/CubicSurfaceExtractor.inl
+++ b/library/PolyVoxCore/include/PolyVoxCore/CubicSurfaceExtractor.inl
@@ -24,11 +24,13 @@ freely, subject to the following restrictions:
 namespace PolyVox
 {
 	// We try to avoid duplicate vertices by checking whether a vertex has already been added at a given position.
-	// However, it is possible that vertices have the same position but differnt materials. In this case, the
+	// However, it is possible that vertices have the same position but different materials. In this case, the
 	// vertices are not true duplicates and both must be added to the mesh. As far as I can tell, it is possible to have
 	// at most six vertices with the same position but different materials. This worst-case scenario happens when we
 	// have a 2x2x2 group of voxels (all with different materials) and then we delete two voxels from opposing corners.
 	// The vertex position at the center of this group is then going to be used by six quads all with different materials.
+	// One futher note - we can actually have eight quads sharing a vertex position (imagine two 1x1x10 rows of voxels
+	// sharing a common edge) but in this case all eight quads will not have different materials.
 	template< template<typename> class VolumeType, typename VoxelType>
 	const uint32_t CubicSurfaceExtractor<VolumeType, VoxelType>::MaxVerticesPerPosition = 6;