Blender and glTF Export - Fix Mirrored Parts Shading Issues

[aiaustin]

Blender and glTF Export - Fix Mirrored Parts Shading Issues

[aiaustin]

Blender snapshot attached along with Khronos glTF Sample Viewer normal view and one of the Debug views. I should add that I have checked for the obvious things like scale showing negative, normal facing the same way as the good side, etc. From internet searches I do suspect some issue with Tangents, BiTangents or Shading. But how to fix that is quite another matter.

[julienduroure]

Hello,
Still under investigation, but seems the model is quite weird. Trying to remove double on this part of the plane delete huge number of vertices

[aiaustin]

Yes, I saw that too.. but sticking to why the left chine is handled differently, it is an example of the general problem I see in several models. It would be good to explain it or get a fix anyone can replicate.