Just wondering - What about dynamic vertex wheights? :-0 I know, crazy, but still. I also think that delete vertice/tris should be implemented first. The main reason this would be useful is animation blending. You would have to have a model with two sets of the same bones, but I'd say it's be worth it. For instance, you could have a limp animation, and then mix it with a shoot animation. You could even mix dynamic physics with animations. for instance, a guy running, and then being shot in the shoulder. Mech Warrier 4 implemented this.