animation - FBX models look like folded in three.js

Question

recently I started working with models from mixamo. To give those models several animations I first extracted animations from some meshes, put them together and gave them to all the fbx- meshes. That worked most of the times.

Then I got aware that these animations can be simply downloaded and so did I using a similar procedure to collect some animations and share them with the meshes.

BUT now the meshes zombie- look like

Is this a known issue ? I know the odds are against me as many people use mixamo. If someone already stumbled about it, please be so kind and tell me a solution.

Thanks for your time.

edit:

question from:https://stackoverflow.com/questions/65917182/fbx-models-look-like-folded-in-three-js

Answer 1

Waitting for answers