I’m gonna try re-unwrapping the face quickly again to see if not using half solves it
EDIT: That did get rid of the line…
But now I don’t understand why having UVs that are mirrored so on top of each other don’t work in this case? It seems to work for other parts of the body, just not the face
EDIT2: solved. Thanks Ggil you got me on the right track. I didn’t find this massive topic when searching ([BUG] Symmetrical Blender Model with TangentGenerator and NormalMap - #57 by nehon) but the generator does not work well with mirrored UV it would seem. I didn’t know the ogre exporter includes tangents so it was an unnecessary step, and the ogre exporter seems to work with mirrored UV, so problem solved. thanks