I cant figure out why my hand bone )which is the ik target) can overlap the forearm. In the tutorial Im trying to use the hand bone pushes the forearm back and bends the arm.
I hope these pics will explain the problem.
I am not sure if you have the arm IK setup properly. Bone with IK constraint appears yellow. You don’t have yellow bone.
post a blend file
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I think I figured it out. It had something to do with the forearm bones ik rotation constraints. I just turned them off and it seems to still work fine.
The bones are red because I assigned that color to all the ik bones.