Chris - I have the same question. I use KeyShot Pro and I get absolutely smooth surfaces from MoI ( I do close ups of jewelry mostly).

I assumed the NURBS feature in KeyShot was for modeling applications that don't provide a good mesh output.

I tried KeyShot NURBS on a MOI 3dm file and saw no difference in quality - just a slow-down.

If anyone has a comparison render showing MoI obj vs MoI 3dm in KeyShot that does show a difference, I'd like to see and understand why.

Ed Ferguson