Hello. I realized the text about bitmap tiles was both out of date (still left at 4x4 tile size, new is 8x8 since R4) and a bit too brief to be of use. I updated it, and tried to be more detailed in the explanation. New text is at <http://www.blender.org/modules/verse/verse-spec/protocol-datatypes.html#type-VNBTile>. Regards, /Emil