> Although the SolidWorks generated n-sided patch is not lumpy, it also looks to be significantly not G1 at its connection to the boundary surfaces,

So, if a fairer patch could be made by the library guys (like unto) SW's version, which seems to sacrifice edge accuracy for lumpiness, could there be a way to 'brute-force' G1 to the seams, or some kind of 'adequate' matching? Which will no doubt add new lumpiness...

Okay, I know that the N-sided patch is revealing itself to be a tall and perhaps implausible task, but does the 'star' or 'single skin' method look reasonably better at only three or four sides compared to six? I certainly run into three and four sided spaces more that I'd like, and even the 'star' solution would work better than some of the hackneyed 1-to-1 blend schemes I have to come up with. :-/

Yep, Pilou, these 'other' apps are wayyyy out of my price range, so it's not a solution I can use.