I have been playing with the ODE physics library and it''s pretty cool and all but I seem to be having a strange problem with my simple simulation I can''t seem to figure out. Ok what my simple simulation does is just drop a box onto the floor, very much like the demo program that comes with the ODE source. Now, when there are three or more boxes touching they disappear for some reason. They do it once the boxes come to a rest and stop bouncing/wobbling or whatever. Any one know what in the world could cause this? I searched the ODE mailing list archives but nothing talked about anything that would help my simulation. I don''t know what would cause this, my demo is almost the same as the demo that comes with the ODE code so why it acts different I have no idea. Thanks. -SirKnight