Modeling idea?

hi good morning! i found this model quite interesting, any idea how it is modeled in rhino? all i can think is maybe somehow done in sprial or create uv srf…?

Use command vertical helix then command sweep 1 rail with a line.

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hi @chen.shijie


create helix inside of the revolved, use pull from inside then scale the helix 2d
to the outside and use pull again. mirror one of the resulting curves trim one
or both curves to generate a transition with blend curve.

use slab


thanks so much for answering!