Summary
Mutable seems to be generating meshes with incorrect skin weights in 5.8, especially around the pelvis/lower stomach/upper thighs. The characters look fine standing still, but any animation affecting those areas such as crouching results in a badly deformed area.
I created a new third person project and tested it with the default Quinn model to confirm no other plugin was causing it. The attached image shows the metahuman from my original project.
The video shows the default Quinn project with the animation MM_Rifle_Jump_Fall_Loop. The actor made with Mutable is on the left. The regular skeleton mesh actor on the right doesn’t have the issue. I also show my Mutable CO file, so I assume this is just a bug that shipped with the 5.8 version of the plugin.
What Type of Bug are you experiencing?
Animation
Steps to Reproduce
Create an actor using a generated mutable asset and attempt to use animations that bends the pelvis/thigh areas.
Expected Result
The mutable actors should animate correctly like their original skeletal mesh models.
Observed Result
The mutable actors have badly deformed regions all around the pelvis.
Affects Versions
5.8
Platform(s)
Windows
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