when i try directly SketchUp to UE4 with FBX file…
here is 3th basement floor of my project.
and it has 4 groups (floor,walls, ceiling and ramp)
then i export them seperately to UE4 with FBX file…
then i import it and build
here is the result… i tried all export options for FBX into SketchUp and nothing changed…
and this is the file of basement… only 800kb https://www.wetransfer.com/downloads/6b73d22707952c4eb8c8d2f3525b911420150521114306/fee92648d1fb638f24d18e6058c757d320150521114306/db3c2e