I’m in the final cleanup stage for this model, getting all the weights balanced and making sure there are enough loops in just the right places on the mesh, and all that. I want a body rig done that I can reuse for some other characters, before I do all the shape keys for the face, so I need this one clean enough to reuse without discovering bugs.
The problem is that I’ve just realized that the left arm pops up the scale equivalent of about two inches when in pose mode. Everything stays in line; it just rotates with the hand dislocating the furthest. It looks perfectly natural, as the generic spread-arms pose goes, but it’s just…weird. In edit mode on the mesh, the hand is out of line with its bones. In edit mode on the armature, everything lines up just fine. It seems that in pose mode, something is pulling up on the end of the arm. All the constraints are the same on left and right, so I just don’t see why this is happening.
I still need to run Feelgoodcomics’s script to clean the weight painting, since there are lots of places with more than 100% weight between two or three bones, but I don’t think this is what’s causing the problem. Otherwise, it would be happening all over the place instead of just that one arm. I’m just not sure what I’ve done.
jackstonecleanup.blend (958 KB)