I'm making a humanoid rig in blender and whenever I rotate the forearm, it will deform it horribly and ruin the upper arm as well. This also happens with the legs.


  • $\begingroup$ maybe you need to change the IK pole angle? $\endgroup$ – moonboots Oct 18 at 6:02
  • $\begingroup$ Your weights are wrong. Try to reassign them. In your case the simpliest solution if you assign the Vertex Groups in Edit Mode. $\endgroup$ – FFeller Oct 18 at 14:03

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