I am working on a modular building set, for an underground sewers scene! I am creating the models in Blender, just an FYI
There are a few problems I need to address first.
First off, following a few tutorials, I created two UV sets. One for the repeating texture, and one for the lightmap unwrap:
Of course, to use the repeating texture/material, well, repeatedly, I need to make the UV’s leave the square previewer and have it, well, repeat. That is the correct way to do it, right?
The lightmap uv’s, however, have no overlapping, and all the islands are inside the square previewer.
When I import it into UE4, I get a bunch of problems!
First off, it gives me 3 unwrap channels??? The mystery third channel is the one that you see in the previewer. Where did it come from?? I didn’t unwrap that!
And secondly, the errors list I get after the light build say that
I have overlapping UV’s
The Lightmap has Overlapping UV’s (by 8.2 percent??).
Well, for one, overlapping UV’s for the base texture is fine, how is that a problem?
And secondly, my lightmap doesn’t have any overlapping UV’s! Is it using the mysterious 3’d unwrap as the light bake? How do I get rid of that? It just like, generated that unwrap by itself! I can’t delete it from UE4, and it doesn’t exist in the Blender version! What do I do?