Hi Michael,
Thanks a lot for your clear explanation, it works fine this way with the OBJ formatting.
Btw, Keyshot may have a look at reading in the NURBS information from Rhino directly.. hope they do it.

Cheers,
dwas.

Thanks to all for the response, in KS3 it turns out to work best exporting with the OBJ format.

Cheers,
dwas