Uhh, yeah...Edit
The combination tile is used to display two tiles on top of each other (where combination comes from), if I remember correctly. When the actual tile is inserted into the level, it displays what was last drawn in that instance. I don't know a lot about it, so someone else (i.e. Andrew or James) can try to write about it. It's also referred to as overlay buffer by Chip's Workshop and CCLD. --Geochip1 18:17, July 10, 2010 (UTC)