@NolosQuinn : I did a test with Sassy hair and everything seems to run correctly. You say you have an animation that works well and others that do not work. Is it just the animation that is different or have you applied different morphs on Sassy hair. Normally, if the hair is the same and in the same location on the character, all simulations should work the same way. If the hair are different, There certainly are vertices inside V4's head. I can explain you how to resolve the problem.

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