Hi there, I updatet my Rhino8 from 8.24.25.281.15002 to 8.25.25314.11002 on mac. Since the update the sweep1 component in grasshopper is extruding in the opposite direction. The bug happened on two different computers with the latest update and it didn’t appeared on a computer with older Rhino Ver…

[Bildschirmfoto 2025-11-18 um 15.20.46] Rhino8BUG.3dm (2.3 MB) Rhino8BUG.gh (5.6 KB)

Hello Hannah, I am not an expert in Rhino versions, so do not know if there is a a bug, but I have an explanation. See image below. You see that the starting point of your rail is at the opposite side of the line. [Schermafbeelding 2025-11-18 om 21.47.17] [Schermafbeelding 2025-11-18 om 21.41…

Hi @LOMA , We are aware of the regression and working to provide a fix in the next Rhino SR. GH Sweep1 Different in SR25 or later : RH-90489 Issue Cited in Sr25 or later: Version 8 (8.24.25281.15002, 2025-10-08) The issue is not in sr24 or earlier Description: Sweep1 in GH changed in S…

Hi @LOMA , This was broken in Rhino 8 sr25 release. Grasshopper Sweep 1 started using Global blending, instead of local, with no options for inputs. This has was not detected and sr25 was released and it should be fixed in in sr26 service release. If this is an issue with your GH definitions, you …

Thank you very much :slight_smile:

I still noticed different behaviour in the sweep1 component in 8.25.25328.11001, compared to earlier versions. Going back to SR24 helped, so I will stick with that version for now. When the sections are not connected to the rail, a surface is created between the sections as expected in SR24. In SR2…

Can you post an example file which works correctly in 8.24 but fails in version >= 8.25?

Attached is a Grasshopper file with a couple of internalized components that shows the difference between SR24 and SR25. As can be seen in the screenshots below, SR24 creates a surface between the three profile lines, whereas SR25 extends the surface to the start and end point of the rail. [sweep1…

Without reading this thread (or trying any posted GH files), I this a bug :question: (per title) P.S. Oh, this one? Fixed three weeks ago? Grasshopper: Sweep1 Different in SR25 or later : RH-90489 Issue Cited in Sr25 or later: Version 8 (8.24.25281.15002, 2025-10-08) The issue is not…

Bug in the Sweep1 Component in Grasshopper since the last Rhino8 update

Grasshopper

brian (Brian Gillespie) November 24, 2025, 11:06pm 7

RH-90489 is fixed in Rhino 8 Service Release 25

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Bug in the Sweep1 Component in Grasshopper since the last Rhino8 update

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