Problem with tangents

[m-kostrzewa]

I've had some issues with tangents going crazy after a mesh is fractured. See attached video. The effect can be seen as soon as the big sphere is fractured. I'm posting a fix that works for me.

This is with standard "HDRP Lit" shader as well as a simple custom shader, using a material that has a normal map.

NebulousMap.-.Battlespace.sceen.-.PC.Mac.Linux.Standalone.-.Unity.2020.3.19f1.Personal_._DX11_.2023-02-12.22-32-27.mp4