In MODO you have your vertex normals, vertex colors, uv’s and all sort of stuff in “vertex maps” and import in UE4 was pretty fine up to this moment.
Whenever I add second UV channel/map to my mesh - UE4 stops to import vertex color channel/map and just paint my vertices black.
Also, if I try to to reimport mesh with vertex color map - it’s reimporting incorrectly with some glitches
I’ve could use auto generation lightmap uv, but this particlar mesh have a lot of overlapping polys(Intentionally, it is a lot of cubes with painted vertices to be animated later) and autogen does not work correctly.
Answerhub link: Import FBX from MODO with multiple UVs - Rendering - Unreal Engine Forums