GLTF Mesh Import: Joint override support

[akleshchev]

Environment

GLTF Mesh Importer branch

Description

Joint overrides result in deformed avatars

Actual:

Expected:

Reproduction steps

I used 'bento boots' and 'angel with tail' models for thsoe screenshots, but issue reproes with almost everything that provides joint positions.

[maxim-productengine]

Some info about that particular model(angel): head position is mismatched only on model preview. After uploading it with 'Include joint positions' and attaching it to the avatar - everything looks correct.

[akleshchev]

I didn't know it renders after upload, it appears to be two separate bugs one with the head and one with override visuals.

[maxim-productengine]

Misplaced head for angel model should be fixed.
Bento boots model seems to be improved as well. (maybe it can be improved further, but I'm not sure).
We still have issues with joint override for other models, so I'm not closing this ticker for now. It may be closed, if separate issues will be created.