Chunky edges

Im a 3dsmax user who is converting to blender.
I am trying to render a sphere (nurbs)
The rendered sphere has jaggered edges? I have the OSA button on and the value 16 selected. Can anyone tell me how to get a smooth edge (I tried dithering but didnt seem to do anything?)

Go into edit mode and to the edit buttons (F9), and in the Curve Tools panel, turn up Resolution U and V. I think that should do it.


Thanks heaps
Seems to have done the trick!