maybe against the 299 $ for V-Ray plug you can try the 35$ of 3Dlight plug ;)
and carreful
"The other good news is that bugs were plaguing vray for truespace have also been fixed. However, it should be mentioned that this isn't a full-blown vray, like what you may be used to in max for example. It has the features, but not the options. It still has the lush vray look."
About nurbs there are some plugs for add power to it
http://home.mindspring.com/%7Eclintonr/MyTruespace/nurbs/nurbs.html
@Michael : it's not a Demo version of True Space! It's the last release as I undestand ! ;)
http://forums1.caligari.com/truespace/showpost.php?p=71696&postcount=45
What is the format who can receive the Moi nurbs 3dm format?
Import format
• BVH animation and motion capture
• Improved X format
• Conitec 3D Game Studio Format
• DXF format (full layer support) compatibility
• 3D Formats: SCN, COB, SOB, WRL 1.0, GZ, WRZ, DXF, 3DS, ASC, PRJ, LWO, OBJ, LWB, IOB, GEO
• 2D formats: BMP, TGA, AVI, FLC, JPG, DIB, AI, PS, EPS, PNG, DDS
Export format
• BVH animation and motion capture
• COLLADA
• Improved X format and DXF format (full layer support) compatibility
• 3D formats: SCN, COB, CAN, WRL 1.0 & 2.0, DXF, ASC, 3DS, X, iSpace format
• 2D formats: • BMP, TGA, AVI, JPG, TIFF, PNG, PSD