Hello,

I am a 3D generalist and so I do all sort of stuff with XSI. From modeling and texturing environments to rigging and animating characters. But recently I’ve been getting this small bug. When I create a simple 2+ bone chain and move it around, the bones star shaking randomly. They do follow the controller, but not exactly..

I am doing a basic sequence of building an IK:

1. create chain.
2. create null object, snap it to null at the end of chain.
3. position constrain chain end null to newly created one.
4. Parent the base null of the chain to the controller that controls rest of the character (for example: Shoulder)

In most cases when I move the chain controller I get exact motion and there are no problems. But sometimes I get this jiggling small vibrations and I don’t know what I’m doing wrong that the XSI does not calculate constraints correctly..

Any suggestions for the solution would be of great help!