Looks like I'm late, but you could try an old script from Max.

It passes the model created in MOI to a Cycles Standalone renderer. Here is the link to the forum post.

http://moi3d.com/forum/index.php?webtag=MOI&msg=7208.16

Here is the link to the script
http://moi.maxsm.net/?amount=0&blogid=1&query=cycles


-s

Thanks I dont know how I lost this option but it seem old than 5 years and cycles made a lot progress in speed and quality.

Surfing around web I founded this one a bit old but compatible with CAD software and import IGES STEP and Brep and source available.
and it's Freeware ;)



https://www.opencascade.com/content/cadrays

Nothing more to do in line command than the table construction ?

On Linux WineHQ, seem not working on my notebook but Yes is version with GUI there is a little tutorial, but the render engine zip folder is dated March 9, 2017. a bit old..

In fact not too difficult the CadRays! :)
And ultra speed!
And can import directly iges & Step file from Moi!
I was affraid by the Command line...but not used it! :)
Just a little logo on the left corner...

Now I want see more... try with more complex projects.. like the the project of ultra efficient vehicle.. ;)

Have you succes to render on the same time (nurbs object Step, IGES) and OBJ objects with CADrays ?