I've had a little trouble with some collisions. I'd like to have to two boxes of the same class act like boxes should: one riding on the other. From what I've tried, "A rides on B" just results in the boxes sinking into each other. The project "Turok World" from a while back had boxes riding on each other, but that was with everything but "A rides on B" checked. It also resulted in the boxes flying up into the air...
Any suggestions?