Twitchy bones

[Mike Roberts]

Hey guys,

Getting twitchy IK bones. I have an arm with a shoulder blade, and the shoulder blade bone twitches depending on where the hand target is. It seems like the IK gets inverted or something as i can sometimes correct it if i rotate the individual bones a bit up the IK tree.

Hopefully i've explained my problem.

Thanks in advance!

[GCharb]

Working on a rig right now, with a shoulder bone, but I get none of this in 11.1.

[neeters_guy]

Sometimes IK has difficulty resolving all the different constraints with the target. Bone flipping is a common problem. You already figured out that you can help the IK along by manually rotating a bone on the chain. Some animators don't use IK at all, preferring instead to have total control over the movements.

Hey, Gilles, that's a nice rig. Looking forward to seeing it in your tutorial.

[Mike Roberts]

Thanks guys,

I'll fight it out with the manual adjustments. No IK? What's the point of living!? ha.