Thanks! That did solve my problem. Actually, I already did that the first time I made the ring and found it blocky, but for some reason, it made the circle weird, like it was a roundish sort of diamond or something. However, I decided to try it again, and now it worked! Raised the U spans to 30, but left the V at 4, rebuilded surface and got a pretty good circle going.

NOW, I have a new problem. When I render it, there are these weird black things going on around the spaces where the curves of the circle used to be before I lofted them. I rendered this at production quality A4 size 300 dpi. Is there a way I can remove these weird black gaps on the circle?

Also, if you notice, the right side of the triangle isn't very smooth. There seems to be some jagged edges. Is there a way to smoothen those out?

Thanks again in advance!