Hi guys, I’ve been wrestling with this problem for over a week, so I’m hoping you can help me out. My problem is that when I rotate a bone in my rig’s torso, the mesh twists like a corkscrew. As far as I can tell, it’s not a weight painting problem. I’m kind of a rigging beginner, so for all I know I turned some setting on that shouldn’t be on. Also, I don’t know if this is important, but the bone I’m rotating is just a control that affects another bone that actually deforms the mesh. Here are some pictures of my problem (the red shapes aren’t part of the problem, they’re just IK controls that are left behind because the IK isn’t on).
This is how he looks when everything is fine, before I twist his torso.
This is what happens when I grab the Y rotation handle or type in the Z rotation channel. This happens when rotating toward either side.
At a certain point in the rotation, the corkscrewing goes away.
The problem also occurs when I try to rotate the Z handle or type in the Y rotation channel.
It also twists if I rotate the X handle or type in the X rotation channel. This happens in both directions.
If you guys have any suggestions on how to fix this, that would be great!