VFR,
Surfaces don't have to follow the same rules as solids. What this means is "sometimes" you get a cleaner smoother surface by lofting or sweepeng surfaces. There are fewer end conditions to resolve.
This is especially true with hydrodynamic or aerodynamic shapes where you'll have a foil shape that might transition to a series of hard edges (like the tail of a surfboard). I've designed several surfboards and a boat in SW, and it's not really possible to do using solid operations. It was however very easy using surfaces.
Using surfaces to design prismatic mechanical shapes though, is just plain ignorant.
Regards
Mark
I never really got the point of surface modeling. Our CNC programmer
> does all his work with surfaces but thats a learned condition. Where
> does surface modeling have it's advantages over solid modeling.