The only thing I can think of is surrounding the chest with an invisible box or cylinder and collision-checking THAT... it wouldn't be exact though. Or, you could do the animation manually, by creating seperate meshes for the lid & the bottom of the chest, and then rotating the lid.
If I may add, collision checking with animated meshes is a complete pain in the rear end. I've NEVER done it sucessfully.
If I may add, collision checking with animated meshes is a complete pain in the rear end. I've NEVER done it sucessfully.