Try going to the Lists tab and expand Other Maps, then delete any vertex normal maps. Sometimes when you mirror geo with vertex normals, it does really strange things that requires deleting or resetting vertex normals. Alternatively, if you're the one who made the vertex normals and you want to keep the ones that are on…
Yeah, the vertex normal maps are locked in object space - so when rotating/mirroring a mesh with a vertex normal map, the normals don't get updated. So you can either remove the vertex normal map (you can find it in the "Other Maps" section of the vertex map list - just select it, right click and hit Delete), or upgrade to…
Thanks a lot guys. Ya the mirrored mesh had a normals map stored in it's list. Not sure if it was a vertex normal (all it said was "normal") but clearing the maps from the high poly fixed it regardless. Thanks for the help
Can't say I've ever had that, but I don't bake in modo. When you mirror are you enabling merge vertices? If not, try that. If welding/mesh cleanup ruins the UV's for the mirrored piece, then you need to use the Vertex > Merge option (not the Merge Tool) with an fixed range. Could you do this without mirroring the highpoly?…