So I'm trying to UV map this object. I need 2 UV sets, 1 for texture and 1 for lightmap. But when I copy the UVs to new UV set and I move the UV shells in the 2nd UV set, I get this distortion near the shell edges. Any suggestions? 1st UV set: 2nd UV set:
Ok your uvs are fine, this looks like a bug in 2016 in how the uv editor's checker pattern is displayed if uv sets don't have the same exact UV seams. The workaround is easy, but not as convenient: Create a new material and assign a checker to the color/diffuse. Use UV linking: Windows>Relationship Editors>UV…