But if I import the file from Maya to Substance it doesn't make my problem, but if I import the same model from Zbrush to Substance. I get this weird UV distortion at top. Anyone having any ideas for why it does this? I have tried every approach to fix this, with no luck and I simply don't know anymore what is the issue here.
Hello @Nardieloni,
Thank you for sharing these files.
Indeed, the difference in geometry between the meshes is the likely cause of the UV distortion. Moving vertices after UV mapping results in stretching, as the UV mapping of the impacted triangles does not update automatically to account for the new vertex positions. The distortion in the screenshots you linked above is consistent with the position of the moved vertices.
Generally, it is recommended to UV map the final version of a mesh, and not modify its geometry afterwards. Thus, I suggest applying the modifications you require in ZBrush before UV mapping the mesh.
Best regards.
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