Messed up UVs Substance Painter

Skinner3D

Heyo all,
So I imported a file into substance painter using FBX filetype. Everything worked pretty good except that some of the texture sets UVs got messed up or completely greyed out. I can't paint on the greyed out ones, and a small bit of one map didn't transfer so I can't paint on that either.
I checked the fbx file in my modeling program and it looks like it is fine. All the maps are there. I have tried reloading the object in SP. I tried exporting the mesh out of SP but in the modeling programs the UVs are still fine. I have tried loading a new version of the model, but then I lose all the painting I have done on the model, which doesn't make sense because the UVs don't change.

Here is an example. Several texture sets did this.

Froyok

Make sure that all your UVs are between the 0 - 1 range, otherwise you won't be able to paint them.

Skinner3D

I am not even sure how to set that in Lightwave. Will have to do some research.

Skinner3D

Still haven't figure out the 0 to 1. Although all of my maps are within the 0,1 borders if that is what you are talking about. I tried completely resurfacing and remapping the problem parts and only one of five worked. 

However, when I made the maps in ZBrush it worked fine. There must be some weirdness in how Lightwave makes UV maps.

kanga

It sounds obvious but check there is some space around uv islands. The chunks look pretty close. Also have you checked none of the uvs are flipped?

Skinner3D

UVs are very much not my ball of wax. How would they be flipped? Wouldn't UV's that were crossed just end up with the same color paint across the points?