Quick answer: Cloth.solverFrequency = 240. Iterations = 4. Sleep Threshold 0.5. World Velocity Scale 0.5.
Cape on character oscillates rapidly when standing still. Solver too few iterations.
The Fix
Cloth component:
Solver Frequency: 240
Solver Iterations: 4
Stiffness Frequency: 100
Sleep Threshold: 0.5
World Velocity Scale: 0.5
World Acceleration Scale: 0.5
Damping: 0.1
More solver iterations stabilize. Higher sleep threshold parks idle cloth. Lower world scale reduces over-reaction to character motion.
Verifying
Standing: cloth at rest. Moving: dynamic but not jittery.
“More iterations. Sleep aggressive. Calm.”
Related Issues
For ArticulationBody, see drive. For Rigidbody jitter mobile, see jitter mobile.
More iterations. Calm cloth.