Hi all, can someone help me to transform a trimmed surface into an untrimmed surface?

from trim to untrim.gh (4.5 KB) this is the case I need to solve!!! Thanks

Unfortunately, you can’t. The trimmed parts are just hidden for you, but they are still there.

is not there a way to do it? time ago I did it but now I don’t remember how I did :frowning_face:

is not there a way to do it? time ago I did it but now I don’t remember how I did Not possible, that can never be an untrimmed surface. It has holes. [Capture]

I understand! So starting from 3 curves, is there a way to create an untrimmed surface?

IF there are holes then no. Untrimmed surfaces have 3 or 4 outside edges and no internal edges (holes)

Why do you need it as untrimmed?

I need to create a grid on that surface

Create grid on untrimmed surface. Cut the wholes atferwards into the grid.

In fact in the rare occasion where trims are short paths (in a way the case with planar stuff and convex 3-4 edge holes) you can approximate the underlying surface as an untrimmed one using short paths, division pts etc etc. [Screen%20Shot%20034] But this is a rather rare case anyway.

From trimmed surface to untrimmed surface

Grasshopper

René_Corella (René Corella) October 6, 2025, 9:51pm 18

@LeGaulois, remember?
TrimmedTOuntrimmedSRF_cc1.gh (227.1 KB)

or a grasshopper eternity: 40+ seconds.

Refit trim - trimmed to untrimmed srf

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From trimmed surface to untrimmed surface

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