objects missing after import


I’m new to Unreal studio.

When importing a .3dm Rhino file with the datasmith, some of the objects have gone missing.

My Rhino file has been prepared though. All normal have been flipped to face outward. And all objects in Rhino have been checked to be valid.

Any idea where the problem may lie?

I have also checked whether there could be an issue with the translation of (poly)surfaces that contain weighted control points in Rhino. (Parts of my model have this) Seems that’s not the issue since some of those polysurfaces with weighted control points have been translated correctly by Datasmith.

Nobody ever had this issue?