i tried importing with the third option “normals and tangents,” instead of just “import with normals,” but it didn’t seem to make a difference - not clear on what the difference is; I thought your tangents were always perpendicular to your normals, and oriented via the UVs (or something)? so theoretically, it shouldn’t make a difference if i let Maya or Unreal calculate them, right; at least, it didn’t seem to.