Constraint the elbow position when using Final IK

Hello there,

I’m trying to have a floating arm which follows my real arm in the virtual reality scene.
Right Now I’m using Limb IK, and positioning the shoulder using a HTC Vive Tracker, the VR Controller is used as the Hand Target.

So far everything goes well except the elbow position, which is quiet different from my real elbow (e.g. the projection of my real hand, elbow and shoulder on the floor is in the same line, but the virtual elbow is not).

I’m wondering is there’s any parameters to config this.
Or, for example, if I can have an another tracker on the elbow, how can I integrate with Final IK to solve this?

Thanks in advance!

You need to ask Root Motion support.