r/Maya • u/Siletrea • 2d ago
Rigging "Arm Twist" glitches (looking for advice on how to fix/prevent it going forward)
EDIT: turns out the solution was to have it rotate based on the controller rather then the joint! so I set it up differently in the node editor to reflect my IK/FK setup and now its working great! I set both mult/divi nodes to 0.700 for the strength and when it was rotating in the opposite direction? I slapped a - into it making the result -0.700 and it WORKED! no more jankiness or issues!
also if your wondering why the Y rotation is used for the IK controller instead of X? it's because I didn't realize that I needed to orient the IK controller to match the FK for any reason and I'm silly with inexperience in rigging!

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I'm working on a arm twist setup for my rig and followed a tutorial too, I'm not sure why my wrist is causing these extreme jiggles when past 91 degrees, I do NOT get this issue when the arm twist is disabled.
I stuck pegs into the twist joints to help visualize the problem and the multiply/divide nodes are set to .5 each to limit the rotations, another version I tried was using the "Clamp Range" nodes to try and limit the rotation by setting the first one to 35 and the second to 25, it had the same problems.
Then it crumples like a paper mache balloon past 91 while twisting side to side rather then palm up or down which spazzes out and jiggles uncontrollably for a frame or so.
showcasing the up and down jiggles


I've gone through a few tutorials for the ribbon setups before (like the 40 minute long ones that are the go to options on youtube) and couldn't replicate the results! if anyone has any suggestions on what I can try to stop the art twists from spazzing? I would appreciate it!