# \#sweep1

**URL:** https://discourse.mcneel.com/tag/sweep1/999.md

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## [Sweep1 does not work with polycurves - \[Please fix\]](https://discourse.mcneel.com/t/sweep1-does-not-work-with-polycurves-please-fix/219621)

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**Author:** [@Intuos](https://discourse.mcneel.com/u/Intuos)\
**Replies:** 9\
**Last updated:** [June 7, 2026, 12:11pm UTC](https://discourse.mcneel.com/t/sweep1-does-not-work-with-polycurves-please-fix/219621 "2026-06-07T12:11:44Z")

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I’d like to create street segments by sweeping their profiles along a rail to blend different street widths. However, the Sweep1 component does not handle polycurves at all: And for the whole street: Sweep1 polyc…

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## [Sweep 1- twist](https://discourse.mcneel.com/t/sweep-1-twist/217687)

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**Author:** [@Michelle\_Zephyr](https://discourse.mcneel.com/u/Michelle_Zephyr)\
**Replies:** 7\
**Last updated:** [April 13, 2026, 1:04pm UTC](https://discourse.mcneel.com/t/sweep-1-twist/217687 "2026-04-13T13:04:09Z")

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Hello, I have this problem where I tried to make a sweep 1 with differents curves (section) and it seems to work but I have twist between curves. How can I fix that? Thank you in advance for your help. here is the …

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## [Sweep1 Sweep2 Incomplete Work-Around](https://discourse.mcneel.com/t/sweep1-sweep2-incomplete-work-around/215681)

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**Author:** [@davidcockey](https://discourse.mcneel.com/u/davidcockey)\
**Replies:** 4\
**Last updated:** [February 9, 2026, 9:33pm UTC](https://discourse.mcneel.com/t/sweep1-sweep2-incomplete-work-around/215681 "2026-02-09T21:33:18Z")

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Sweep1 and Sweep2 do not sweep the entire length of the open (not closed) rail(s) unless there are sections at both ends of the rails, or there is only one section and it is at the one end of the rail(s). This can be use…

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## [Problem with Sweep1 for rectangular railing](https://discourse.mcneel.com/t/problem-with-sweep1-for-rectangular-railing/215390)

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**Author:** [@eddy\_chen](https://discourse.mcneel.com/u/eddy_chen)\
**Replies:** 0\
**Last updated:** [February 3, 2026, 2:14am UTC](https://discourse.mcneel.com/t/problem-with-sweep1-for-rectangular-railing/215390 "2026-02-03T02:14:45Z")

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Hi everyone, I’m trying to create a rectangular railing using closed outlines. My current approach is to use Sweep1 with a rectangular profile. However, I’m running into a few problems: One Sweep1 cannot sweep the …

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## [Bug in the Sweep1 Component in Grasshopper since the last Rhino8 update](https://discourse.mcneel.com/t/bug-in-the-sweep1-component-in-grasshopper-since-the-last-rhino8-update/212566)

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**Author:** [@LOMA](https://discourse.mcneel.com/u/LOMA)\
**Replies:** 13\
**Last updated:** [December 16, 2025, 9:00pm UTC](https://discourse.mcneel.com/t/bug-in-the-sweep1-component-in-grasshopper-since-the-last-rhino8-update/212566 "2025-12-16T21:00:54Z")

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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 …

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## [Sweep1 with several sections problem](https://discourse.mcneel.com/t/sweep1-with-several-sections-problem/208156)

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**Author:** [@Coopercho](https://discourse.mcneel.com/u/Coopercho)\
**Replies:** 7\
**Last updated:** [August 8, 2025, 8:47am UTC](https://discourse.mcneel.com/t/sweep1-with-several-sections-problem/208156 "2025-08-08T08:47:09Z")

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Hi all, I am trying to Sweep multiple sections along a polyline rail in Grasshopper. The process works within Rhino. Desired result: But it doesn’t work within Grasshopper. So I tried to segment the rail so I …

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## [Parameteric helix shape with multiple variables](https://discourse.mcneel.com/t/parameteric-helix-shape-with-multiple-variables/202380)

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**Author:** [@Tanishq](https://discourse.mcneel.com/u/Tanishq)\
**Replies:** 4\
**Last updated:** [April 2, 2025, 3:31pm UTC](https://discourse.mcneel.com/t/parameteric-helix-shape-with-multiple-variables/202380 "2025-04-02T15:31:37Z")

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I’m some attaching some images of a spiral tube that i need to create on grasshopper , and keep it as variable dependent as possible. I have managed to create a singular rail curve but am unable to sweep the profile shap…

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## [Map a texture along curve](https://discourse.mcneel.com/t/map-a-texture-along-curve/199014)

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**Author:** [@Espen1](https://discourse.mcneel.com/u/Espen1)\
**Replies:** 5\
**Last updated:** [February 5, 2025, 10:29am UTC](https://discourse.mcneel.com/t/map-a-texture-along-curve/199014 "2025-02-05T10:29:51Z")

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I have created a sweep of a profile along a curve: And I have created a brick texture that I want to map along this curve as well: I would like to map this texture along the curve so I end up with an arch of brick…

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## [Sweep 1 - multiple profile curves](https://discourse.mcneel.com/t/sweep-1-multiple-profile-curves/102210)

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**Author:** [@toh](https://discourse.mcneel.com/u/toh)\
**Replies:** 18\
**Last updated:** [October 23, 2024, 10:27am UTC](https://discourse.mcneel.com/t/sweep-1-multiple-profile-curves/102210 "2024-10-23T10:27:11Z")

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Hi everyone, I’m trying to create a simple script to model a shape from a rail and two (or more) different profile curves. This is why I want to use sweep, to blend between the different profile curves. In Rhino this c…

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## [Sweep 1 Rail issue](https://discourse.mcneel.com/t/sweep-1-rail-issue/192371)

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**Author:** [@C\_Veiga](https://discourse.mcneel.com/u/C_Veiga)\
**Replies:** 1\
**Last updated:** [October 4, 2024, 7:01am UTC](https://discourse.mcneel.com/t/sweep-1-rail-issue/192371 "2024-10-04T07:01:24Z")

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Good evening. In Rhino 8, I’m using the Sweep 1 Rail to create a solid and its giving me 2 errors with awkward results. If I keep Untrimmed miters active the result is the following: If not, it comes separated in 3 …

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## [Grasshopper\_Sweep1](https://discourse.mcneel.com/t/grasshopper-sweep1/178417)

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**Author:** [@Riku\_Suzuki](https://discourse.mcneel.com/u/Riku_Suzuki)\
**Replies:** 5\
**Last updated:** [March 26, 2024, 5:19pm UTC](https://discourse.mcneel.com/t/grasshopper-sweep1/178417 "2024-03-26T17:19:47Z")

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Hi community, I’m stuck to run the sweep1 and have no idea why it doesn’t work. The sweep 1 is supposed to work like image 2, but it resulted in image 1. Can you solve this problem, please? Sweep1.gh (21.6 KB)

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## [Sweep 1 not selecting whole group of rail lines](https://discourse.mcneel.com/t/sweep-1-not-selecting-whole-group-of-rail-lines/175803)

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**Author:** [@Ciro1](https://discourse.mcneel.com/u/Ciro1)\
**Replies:** 3\
**Last updated:** [February 15, 2024, 10:43pm UTC](https://discourse.mcneel.com/t/sweep-1-not-selecting-whole-group-of-rail-lines/175803 "2024-02-15T22:43:36Z")

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Hello everyone! I just downloaded Rhino 8 to start learning before I use the program at Arch School and have been following the Rhino 6&7 intro videos. (Figure they should work mostly similar) I am stuck in 3.1 Surface…

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## [Sweep1 "roadlike" inside grasshopper](https://discourse.mcneel.com/t/sweep1-roadlike-inside-grasshopper/172824)

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**Author:** [@susi33](https://discourse.mcneel.com/u/susi33)\
**Replies:** 1\
**Last updated:** [January 7, 2024, 7:11pm UTC](https://discourse.mcneel.com/t/sweep1-roadlike-inside-grasshopper/172824 "2024-01-07T19:11:25Z")

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Hello, is there a way to sweep “roadlike” inside grasshopper? Unfortunately sweep1 inside grashopper only works as with the option “freeform”. Or maybe there is another function in grashopper to do that?

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## [Sweep1 creating undesired result](https://discourse.mcneel.com/t/sweep1-creating-undesired-result/172394)

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**Author:** [@Kalpit\_3d](https://discourse.mcneel.com/u/Kalpit_3d)\
**Replies:** 3\
**Last updated:** [December 29, 2023, 11:22pm UTC](https://discourse.mcneel.com/t/sweep1-creating-undesired-result/172394 "2023-12-29T23:22:24Z")

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Rail and profile below Result sample.3dm (26.0 KB)

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## [Swept geometries with tree structure](https://discourse.mcneel.com/t/swept-geometries-with-tree-structure/171249)

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**Author:** [@Laoky](https://discourse.mcneel.com/u/Laoky)\
**Replies:** 5\
**Last updated:** [December 11, 2023, 6:32pm UTC](https://discourse.mcneel.com/t/swept-geometries-with-tree-structure/171249 "2023-12-11T18:32:51Z")

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Hey there, I would like to create sweeps from a tree containing profiles. The initial tree contains paths for {0} to {5} which are all geometries in my document, but only paths {3} to {5} are sweeps i want to create. I…

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## [Another GH Sweep Issue](https://discourse.mcneel.com/t/another-gh-sweep-issue/170851)

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**Author:** [@Erdem](https://discourse.mcneel.com/u/Erdem)\
**Replies:** 13\
**Last updated:** [December 11, 2023, 2:07pm UTC](https://discourse.mcneel.com/t/another-gh-sweep-issue/170851 "2023-12-11T14:07:43Z")

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sweep-problem.gh (17.8 KB) Hello dear forum, I am working on this shape. All seems okay to me but at some different rotation angles applied to the first curve of the sweep profiles, it seems like the order of the profi…

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## [Line and seam directions Rhino 8](https://discourse.mcneel.com/t/line-and-seam-directions-rhino-8/169985)

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**Author:** [@Tiwinkle\_Khurana](https://discourse.mcneel.com/u/Tiwinkle_Khurana)\
**Replies:** 3\
**Last updated:** [November 25, 2023, 10:32am UTC](https://discourse.mcneel.com/t/line-and-seam-directions-rhino-8/169985 "2023-11-25T10:32:55Z")

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I just downloaded Rhino 8 last week. I’m learning to use it. I’m unable to see which directions my lines are for circles, squares, etc. Hence, I’m unable to find accurate points to draw on. Also, when I was using the sw…

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## [Data-tree structure for simultaneous multiple sweep1](https://discourse.mcneel.com/t/data-tree-structure-for-simultaneous-multiple-sweep1/169676)

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**Author:** [@gandolphe.thomas](https://discourse.mcneel.com/u/gandolphe.thomas)\
**Replies:** 9\
**Last updated:** [November 24, 2023, 2:46pm UTC](https://discourse.mcneel.com/t/data-tree-structure-for-simultaneous-multiple-sweep1/169676 "2023-11-24T14:46:21Z")

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Good morning, I am struggling with, I assume an easy, yet too complex for me data strucutre issue : I am trying to sweep 2D profiles (laying flat on x;y plane near file origin) along closed polylines that represent t…

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## [Sweep 1 Rail and other features do not work on Mac](https://discourse.mcneel.com/t/sweep-1-rail-and-other-features-do-not-work-on-mac/166959)

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**Author:** [@Scott\_Wilson](https://discourse.mcneel.com/u/Scott_Wilson)\
**Replies:** 2\
**Last updated:** [October 9, 2023, 8:55pm UTC](https://discourse.mcneel.com/t/sweep-1-rail-and-other-features-do-not-work-on-mac/166959 "2023-10-09T20:55:11Z")

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I have been using Rhino on PC since late 90’s. Occasionally use the Mac verison when in need or on the road in a pinch. Just got the newest 16" Macbook Pro maxed out. Rhino seems to struggle on this strangely. Fillets no…

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## [Sweep1 Issue - Sweep could not be created](https://discourse.mcneel.com/t/sweep1-issue-sweep-could-not-be-created/163479)

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**Author:** [@Husam\_Melhem](https://discourse.mcneel.com/u/Husam_Melhem)\
**Replies:** 8\
**Last updated:** [August 1, 2023, 5:02pm UTC](https://discourse.mcneel.com/t/sweep1-issue-sweep-could-not-be-created/163479 "2023-08-01T17:02:25Z")

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I’m trying to create window frames using sweep, but its not working…how can I solve this problem… I attached a screenshot of the GH definition and the section, rail I’m using.

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## [Sweep not working with closed curve rails in Grasshopper](https://discourse.mcneel.com/t/sweep-not-working-with-closed-curve-rails-in-grasshopper/161803)

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**Author:** [@justo](https://discourse.mcneel.com/u/justo)\
**Replies:** 1\
**Last updated:** [June 21, 2023, 8:58pm UTC](https://discourse.mcneel.com/t/sweep-not-working-with-closed-curve-rails-in-grasshopper/161803 "2023-06-21T20:58:04Z")

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Hello guys im new to Grass and im having trouble with my sweeps with my closed curve rails. Need Help! Vessel.gh (24.6 KB)

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## [Sweep 1 problem.. Crv seam and correct order](https://discourse.mcneel.com/t/sweep-1-problem-crv-seam-and-correct-order/160487)

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**Author:** [@Novvak](https://discourse.mcneel.com/u/Novvak)\
**Replies:** 4\
**Last updated:** [May 25, 2023, 10:44am UTC](https://discourse.mcneel.com/t/sweep-1-problem-crv-seam-and-correct-order/160487 "2023-05-25T10:44:28Z")

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Hi, I 'm trying to sweep two profiles on one rail… I don’t know how to make proper position of seam and correct order of profiles. I should be like this The definition sweep 1 error.gh (72.2 KB)

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## [SWEEP1 definition problem](https://discourse.mcneel.com/t/sweep1-definition-problem/160259)

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**Author:** [@umberto\_sanna](https://discourse.mcneel.com/u/umberto_sanna)\
**Replies:** 1\
**Last updated:** [May 21, 2023, 8:07pm UTC](https://discourse.mcneel.com/t/sweep1-definition-problem/160259 "2023-05-21T20:07:49Z")

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Hi everyone. I have a problem with sweep1. I built the track with lines and curves, and then joined it all together… After that, I circled around the starting point of the curve and ran sweep1. The problem is the definit…

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## [Closed Sweep by Closed Curve In Grasshopper](https://discourse.mcneel.com/t/closed-sweep-by-closed-curve-in-grasshopper/157578)

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**Author:** [@Samet\_Yavuz](https://discourse.mcneel.com/u/Samet_Yavuz)\
**Replies:** 3\
**Last updated:** [April 3, 2023, 12:40pm UTC](https://discourse.mcneel.com/t/closed-sweep-by-closed-curve-in-grasshopper/157578 "2023-04-03T12:40:52Z")

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Hi There, I am trying to sweep a closed curve profile on a closed rectangle as you can see in the attachments. But Grasshopper gives errors and the result never was what i wanted to be. Can you help me out? SET OF CUR…

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## [Sweep1 - Data Tree Problem or Bug?](https://discourse.mcneel.com/t/sweep1-data-tree-problem-or-bug/157197)

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**Author:** [@michaelvollrath](https://discourse.mcneel.com/u/michaelvollrath)\
**Replies:** 1\
**Last updated:** [March 27, 2023, 4:36pm UTC](https://discourse.mcneel.com/t/sweep1-data-tree-problem-or-bug/157197 "2023-03-27T16:36:54Z")

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Hello, After scouring the forums and internet at large for a solution I am stumped and hoping I’m overlooking a simple grafting solution. I have a data tree containing rails (branch paths 0,1,2) and a data tree contain…

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## [Sweep won't close between first and second section](https://discourse.mcneel.com/t/sweep-wont-close-between-first-and-second-section/155424)

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**Author:** [@Carlotta](https://discourse.mcneel.com/u/Carlotta)\
**Replies:** 4\
**Last updated:** [February 27, 2023, 9:05am UTC](https://discourse.mcneel.com/t/sweep-wont-close-between-first-and-second-section/155424 "2023-02-27T09:05:09Z")

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Hey there. I guess it´s a simple one: Somehow my sweep wont close between the first and the second section. Any ideas what I am missing? Cheers and thanks. BA\_Geometrie generieren.gh (24.6 KB)

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## [Sweep 1 Problem in Grasshopper](https://discourse.mcneel.com/t/sweep-1-problem-in-grasshopper/151000)

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**Author:** [@Erdem](https://discourse.mcneel.com/u/Erdem)\
**Replies:** 2\
**Last updated:** [November 22, 2022, 5:17pm UTC](https://discourse.mcneel.com/t/sweep-1-problem-in-grasshopper/151000 "2022-11-22T17:17:59Z")

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Hello everyone, Can anybody tell me why this simple sweep operation gives me an error? Sweep Problem.gh (3.5 KB)

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## [Sweep1 closed rail problem](https://discourse.mcneel.com/t/sweep1-closed-rail-problem/144797)

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**Author:** [@Adel1](https://discourse.mcneel.com/u/Adel1)\
**Replies:** 2\
**Last updated:** [July 4, 2022, 3:27pm UTC](https://discourse.mcneel.com/t/sweep1-closed-rail-problem/144797 "2022-07-04T15:27:37Z")

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Hi When I check “untrimmed miter” option, ends of rail get a gap (I should turn this checkbox on) Anyone can help me ? Tnx 220704\_Sweep1\_Problem.3dm (164.3 KB)

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## [Sweep1 wrong results](https://discourse.mcneel.com/t/sweep1-wrong-results/143658)

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**Author:** [@Charles](https://discourse.mcneel.com/u/Charles)\
**Replies:** 22\
**Last updated:** [June 8, 2022, 4:21pm UTC](https://discourse.mcneel.com/t/sweep1-wrong-results/143658 "2022-06-08T16:21:37Z")

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See this: The result is wrong and produces defective surfaces. The defective surfaces are valid for Rhino - they are not. Small.3dm (23.5 KB)

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## [Refit Rail vs FitCrv](https://discourse.mcneel.com/t/refit-rail-vs-fitcrv/139132)

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**Author:** [@MikeM](https://discourse.mcneel.com/u/MikeM)\
**Replies:** 2\
**Last updated:** [March 8, 2022, 6:41pm UTC](https://discourse.mcneel.com/t/refit-rail-vs-fitcrv/139132 "2022-03-08T18:41:54Z")

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Does the Refit Rail option within Sweep1 and Sweep2 use the same logic/settings as the FitCrv command? The help menu for Sweep1 states that Refit Rail “Refits the rail curve before creating the sweep.” and that “When Re…

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