Hey all,
So I’m getting an Overlapping UVs error when they are clearly not overlapping…
The mesh simply consists of 4 planes (terrain) and I’ve laid out their lightmap UVs on channel 2 in 3ds max and as you can see they are not overlapping. The UVs for channel 1 are overlapping but this shouldn’t matter as its the texture’s UV channel.
Very confused.
Hi,
There are a couple of things you can verify here to make sure things are working correctly.
In the Mesh Viewer in UE4 make sure that you’re got the lightmap coordinate set to 1 instead of 0. This will be located in the details panel to the right.
If you’ve got different UVs for your two UVs make sure to use the tool bar and verify that the UVs are different for UV 0 and 1.
The other thing to check is in Max add a UVW Unwrap > Open the UV Editor > Change to UV Channel 2 > Change to Faces select mode > Go to “Select” in the Toolbar > Select Overlapped Faces.
This will select any faces that are overlapped.
By looking at these two things we should be able to narrow down if there is an issue in Max or if we need to look at things in UE4 more.
Thank you!
Tim
Thank you Tim. That fixed the issue. It was the Lightmap coordinate index set to 0. I’m guessing this is because when I first imported the mesh it only had the one UV channel?
Thanks a lot. I never would have figured that out 
Glad that worked for you!
