i've just finished setting up an armature for my model, i used automatic weighting which may be the cause of the problem, but whenever i try to rotate the arms or legs of the model, it causes catastrophic effects on the model's proportions. if the solution has to do with manually painting the weights, is there a more precise way of editing the weights? i would like things to be symmetrical and that, instead of just doing it by eye.

my model before rotating the selected bone

my model after rotating the bone

my model going for it

i would rather the shoulder stay in place when raising the arm, instead of putting it halfway down the torso

thank you

  • $\begingroup$ as Frederik Steinmetz, use Weight Paint mode to adjust, but you can also add a bone for the shoulder, it would help to control this part more accurately $\endgroup$
    – moonboots
    Jun 2, 2020 at 6:32

1 Answer 1


Yes, your weight painting is off, you'll have to use envelopes (not the best solution) or manually adjust the weights, so that the upper arm does not effect the chest anymore.
Select the armature, then the guy.
CRTL + TAB -> choose weight paint.
Use the brush tools to adjust your weights.


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