I've just tried to render out a scene with mental ray that I created, the objects in the scene are nurbs. Through maya's renderer they appear nice and smooth but when I tried using mental ray they render out highly faceted, asthough it was rendering them at display level 1? I went through the documentation which suggests going through the Rendering>MentalRay>approximation editor, all the settings in here are dimed out and simply say "derive from Maya" which should mean mental ray will take the tessilation values I set up within maya but it doesn't? What going on? Any help would be great, Thanks

James.