I use Keyshot Pro for rendering using the OBJ export from MoI. The two programs play very well together.

Keyshot can also import NURBs. They claim it gives smoother edges, but I can't perceive any improvement, so I stay with OBJ. Sometimes I adjust the MoI exporter to suit the particular model if needed. I've never had an issue with tessellation.

I have no experience with texturing programs. Normal Maps in Keyshot is all I use for texture.

Ed Ferguson