Keith,

I brought your model into KeyShot and it looks really smooth. I don't see any anomalies anywhere.

I'll have to defer to the experts as to why it doesn't render well in your program.

Your loft looks pretty close to the SubD version. I tried lofts before Max's scripts were available. I'd say making changes to the SubD structure is a lot faster (for me anyway).

Hopefully someone will have an answer for the render issue you're having.

Ed Ferguson