XRTK - Mixed Reality Toolkit Feature Request

Is your feature request related to a problem? Please describe

The hand tracking implementation of XRTK already calculates curl strength for each finger and hand. Those values are not used for visualization yet though.

It would be nice to give the user a visual cue when grabbing stuff and curling fingers.

Relevant classes:

HandJointVisualizer
HandMeshVisualizer

How would you classify your suggestion

• Usability / Configuration

Describe the solution you'd like

Implement a material transition / custom shader for hand curl visualization that changes hand appearance depending on curl strength of the hand. Nice to have would be to do the same per finger curl strength maybe.