Ramp along 2 surfaces

Rhino Rhino for Windows
1

Hi there, does anybody know how can i build an spiral ramp along those 2 surfaces (i try to make it in picture n1. I have an example (picture n2) but now i want the ramp involves both of the surfaces

rampa
rampa627×517 89.3 KB

picture n1
image
image1046×471 89 KB

picture n2

pd: i dont use grasshopper

2

Hello- I would make a third, temporary surface and envelopes the other two in a way that you like and use that the same way that you made ramps for the individual branches.

-Pascal

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