Well adding bones shouldn't be that hard (blender ?) but the physics sim applied to the animation sounds interesting. I think the implementation of this is kinda hard. The result would be much better than nothing (=what we have now), but may lack lot of possibilities a real physic impl would have. Using the already existing havok engine sounds easier and additionally would provide more realism (collision detection with the environment / other actors). Enabling havok for actors would be indeed necessary. Any chance that Bethesda itself may give a hand on this? Because I don't think just noping out some checks in the PE files for the current object type suffice. Where there similar ideas/plans for cloth physics in Fallout/NV? And if so, what was the reason because they've failed? The funny thing is that this physic stuff is vital for the atmosphere in a game. Unfortunately, it seems that other people including Bethesda doesn't weight that too much.