I have another idea. Dan suggested something like this a while back
http://www.coniserver.net/ubbthreads/sho...true#Post476174

I was thinking it can be done like Paint Shop Pro tubes? Say you create a scene with some rubble -broken bricks- you can create 9 mdl of broken bricks, each a little different and rotated etc. When you finish your level you can go in and 'spray' or 'paint' these mdl's around by a broken wall for example and it would randomly insert any one of these models in this group on the floor. You could also say make sprites or models of pieces of broken glass and spray a few beneath a borken window, or grass sprites and spray/paint a few in a sidewalk crack to have them auto placed.