Smooth transition to wheel arch... how?

Rhino Rhino for Windows
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Hello everyone!

I cant figure out how to get a smooth “SubD-like” transition to a wheel arch on a complex surface…
This is what I try to get:

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image1237×639 211 KB

wheel arch problem.3dm (1.9 MB)

I tried to find some tutorials online but coudnt find any… can someone help?
Thanks a lot!!

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Well in 30 seconds the approach is this:

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Trim out a curve, BlendSrf (with Position continuity on the wheel side.)
Of course it doesn’t look great because I’m not trying and the whole model hasn’t been tweaked with this in mind and there are many other tools you could use, but it’s the general idea.

I’d probably edit the original surfaces to bulge them out to minimize the “work” the blend has to do.

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Hey Niklas,

Jim’s method is a good start, and getting a clean result often comes down to how well your input curves flow into the wheel arch. Try using MatchSrf after BlendSrf to improve surface continuity. If you have clean curves, NetworkSrf can also give you more control over shaping that transition. FilletSrf with a variable radius might work too, depending on the look you’re going for. You could also experiment with SubD in Rhino 7+ for more sculpting flexibility before converting to NURBS.

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Does this video help with the topology layout of subd for body arch transition?

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