Heh. I ran into this problem a LOT in Puzzle Bots. Large levels with lots and lots of room objects. I'd find myself re-purposing older objects from earlier in the scene that weren't in use anymore. A drawbridge object that got blown up at the beginning of a level was then giving a new graphic and became a haystack that you found at the end. Fun times.
Anyway. Yeah. What Francisco said.
Anyway. Yeah. What Francisco said.