NEED HELP! UV Mapping

ErrorEE

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:

throttlekitty

Can you show the before and after of the UVs themselves? I just toyed around trying to break it, but can't do anything like what you're experiencing.

ErrorEE

throttlekitty said:

Can you show the before and after of the UVs themselves? I just toyed around trying to break it, but can't do anything like what you're experiencing.

UV set 1:



UV set 2:


I cut and moved the UV shells.

throttlekitty

It appears that your uvs aren't skewed, but I guess try unfolding the beveled strips only and see what happens? I can take a look at your scene if you don't mind sharing it.

ErrorEE

throttlekitty said:

It appears that your uvs aren't skewed, but I guess try unfolding the beveled strips only and see what happens? I can take a look at your scene if you don't mind sharing it.

https://drive.google.com/open?id=0B17_c8Gw3GPtUDhFdXYzOG8zTEU

poopipe

Maya + UVs  + history = weird shit

? 

throttlekitty

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 Linking>Texture-Centric. Here you can say "use X texture on Y uv set" to actively decide which set should be displaying at the moment.