[Auton]

Actually, if you use a bone-modeling 3D system, like 3D Studio to set up your chatracters for skeletal modelling, and then put these characters into your game (or whatever) which uses rag-dolling to animate 'drops', you should be fine. If making models for a game, in general, if the game/renderer has rag-doll animation, it will use the skeleton of the character for it.