trouble with importing from Clo3d/marvelous to keyshot

[Renata]

Hi,
I was working on a t-shirt that i wanted to render in keyshot, the obj i imported just doesn't look nor render right. it seems that the geometry is not right (where the shade is in the screenshot) but on Clo it is fine.
tried several exporting settings didn't work out. i have seen tutorials on this workflow, they didn't seem to have this problem. what am i missing?
the second snapshot is with a fabric material applied.