Hi there, It seems that trimmed surfaces are hard to work with inside Grasshopper. Is there any way to use properly the “isotrim” on a trimmed surface ? [image] ** If possible I would try to evitate to rebuilding the trimmed srf because I don’t have perfect result with: ruled srf, loft, sweep, …

[image] trimmed div.gh (61.3 KB)

The trim boundary has four curves and four sharp corners. Have you tried extracting the boundary curves and making a new surface from them? EDIT: Yes you have and you don’t like the result! OK, so for the radial lines, assuming they’re straight lines, you could divide the two boundaries by the sam…

@Tom_Newsom didn’t even think about that simple solution! I think for this it will be the way to go. simple and efficient. Although, I still a bit clueless with trimmed SRFs, they do not seems to be practicle for GH operations… Or II don’t know how to manipualte them correctly :stuck_out_tongue: T…

Yes I like that approach! I think this is the way to go! I will test with the problematic trimmed srf and report! Thanks mate. Cheers CC

Work (isotrim) with a Trimmed Surface in GH

Grasshopper

Tom_Newsom (Tom Newsom) September 15, 2025, 9:42pm 4

trimmed div.gh (61.3 KB)

From trimmed surface to untrimmed surface

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Work (isotrim) with a Trimmed Surface in GH

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