Arm twisting problems

Hi. I’m having a bit of trouble with the upper arm on my model. While rotating it up and down, and back and forth work well enough, I’m having some problems with twisting it. Is the problem in the weight painting or in the mesh itself?


There are a couple of older threads dealing with this issue:

Hopefully one of those will help.

Hmm. I think I’ve managed to solve the problem by dividing the arm bone into two bones, one that controls the rotation of the arm, and one that controls the twisting.