Problem with curve

I think there is a problem with this curve, when I sweep the profile curve, the resulting surface has kinks in it. In other words, it doesn’t look smooth. Could anyone help?rebuild mid-wreath.3dm (5.9 MB)

Hi Tortoise - the curve has tangent segments - you can clean up by making these G2- but as far as I can see this will visibly change the shape. The tangency is OK at the curve, but the sweep surfaces end up offset from the curve and this accentuates the discontinuity, is what is happening I guess.

-Pascal

Thanks Pascal, any way to fix without changing the shape?

Try FitCrv at .01 on the rail, and the sweep as ‘Roadlike Top’ - does that look clean enough?

-Pascal

thanks Pascal, much better