hello, i usually use rhino only for modeling but am trying to render something now and am running into a problem i can’t solve.
I have a number of cosed polysurface object i generated with grasshopper. i baked them to rhino and the objects seem completely normal. They are extruded in grasshopper from curves and capped so they have a flat surface on top.
When i try to render them all the objects appear faceted. I have tried everything i could think of, tried all kinds of different materials, converted them to mesh objects, rebuild meshnormals. When i use ‘Rendered’ in the viewport they appear flat as they should but if i use the raytraced viewport or try to render an image with cycles i get the facets.
not sure what i’m missing here 
Here’s the problem:
