this is confusing. i hope to destroy other UV channel so i didnt have error report like “object has wrapping UVs”
and my UVW didn’t overlapping.
Typically your first UV channel is for your texture and the second is for your lightmap. If you have your lightmap UV’s set up before you import to UE4, then you need to make sure to uncheck the option to generate lightmap UV’s from the import dialog, otherwise it’ll copy your UV’s to a new channel and try to flatten them for the lightmap.
So i have to re import the mesh…
