# Lofting problems, twisted result

**URL:** <https://discourse.mcneel.com/t/lofting-problems-twisted-result/172791>\
**Category:** Grasshopper\
**Tags:** windows\
**Created:** [January 7, 2024, 12:37am UTC](https://discourse.mcneel.com/t/lofting-problems-twisted-result/172791 "2024-01-07T00:37:02Z")\
**Posts on this page:** 9\
**Page:** 1

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**Author:** ![Raisa\_Putri](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/raisa_putri/32/508934_2.png) [@Raisa\_Putri](https://discourse.mcneel.com/u/Raisa_Putri)\
**Post date:** [January 7, 2024, 12:37am UTC](https://discourse.mcneel.com/t/lofting-problems-twisted-result/172791/1 "2024-01-07T00:37:02Z")

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![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/e/8/e/e8e4bc481e386d6724b90c3b673095aff1a39f03.png)  
hello, i have no idea why this happens. i’ve tried changing the loft options (ex: refit, rebuild, align curves) but the right loft result is still twisted.

any idea how to fix this loft? the file is attached down below  
[Parametric Roster 2\_trial.gh](https://discourse.mcneel.com/uploads/short-url/41L5tNzgO0mavvnDsJaFMMouZRP.gh) (58.8 KB)

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**Author:** ![Joseph\_Oster](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/joseph_oster/32/549124_2.png) [@Joseph\_Oster](https://discourse.mcneel.com/u/Joseph_Oster)\
**Post date:** [January 7, 2024, 12:46am UTC](https://discourse.mcneel.com/t/lofting-problems-twisted-result/172791/2 "2024-01-07T00:46:08Z")

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Looks OK to me. R7 on Win 10, unit tolerance = 0.001.

 ![missing2](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/b/0/7/b076f235624f5132f63d7a56ce190fbd29d9d409.png)

This code, on the other hand, is a mess!!

 ![missing](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/4/1/d/41d877f0b716a636c377ae664bce6d59f15685bd.png)

Instead of duplicating so much code, it looks like some of your geometry could be rotated 90 degrees, then mirrored?

**P.S.** Sorry, “mess” was probably a bad choice of words. Overly complex, perhaps? The shape looks very interesting, it just seems that rotation and mirror could save you half the work?

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**Author:** ![Raisa\_Putri](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/raisa_putri/32/508934_2.png) [@Raisa\_Putri](https://discourse.mcneel.com/u/Raisa_Putri)\
**Post date:** [January 7, 2024, 3:40am UTC](https://discourse.mcneel.com/t/lofting-problems-twisted-result/172791/3 "2024-01-07T03:40:57Z")

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thank you for the reply! appreciate it. However, the result hasn’t changed for me, still twisted even after changing the unit tolerance

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**Author:** ![kev.r](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/kev.r/32/766021_2.png) [@kev.r](https://discourse.mcneel.com/u/kev.r)\
**Post date:** [January 7, 2024, 5:29am UTC](https://discourse.mcneel.com/t/lofting-problems-twisted-result/172791/4 "2024-01-07T05:29:11Z")

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Looks OK here as well, no changes to your file.

 ![loft_problem](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/e/5/0/e50f61d72dff229ff8c084e8273a264e5c6884d0.jpeg)

Rhino V7.36 on macOS  
tolerance 0.001

-Kevin

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**Author:** ![Raisa\_Putri](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/raisa_putri/32/508934_2.png) [@Raisa\_Putri](https://discourse.mcneel.com/u/Raisa_Putri)\
**Post date:** [January 7, 2024, 6:21am UTC](https://discourse.mcneel.com/t/lofting-problems-twisted-result/172791/5 "2024-01-07T06:21:55Z")

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i see, thank you for answering. i think the problem is happening only in my Rhino then.

to make sure, the ‘tolerance’ you guys are talking about is in the DocumentProperties, right?

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**Author:** ![Joseph\_Oster](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/joseph_oster/32/549124_2.png) [@Joseph\_Oster](https://discourse.mcneel.com/u/Joseph_Oster)\
**Post date:** [January 7, 2024, 12:52pm UTC](https://discourse.mcneel.com/t/lofting-problems-twisted-result/172791/6 "2024-01-07T12:52:10Z")

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> [@Raisa\_Putri](#):
>
> to make sure, the ‘tolerance’ you guys are talking about is in the DocumentProperties, right?

In Rhino _(not GH)_, ‘View | Display Options… | Units | Absolute tolerance’

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**Author:** ![inno](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/inno/32/544036_2.png) [@inno](https://discourse.mcneel.com/u/inno)\
**Post date:** [January 7, 2024, 4:23pm UTC](https://discourse.mcneel.com/t/lofting-problems-twisted-result/172791/7 "2024-01-07T16:23:55Z")

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good also on R8 SR3 (8.3.24002.13001, 2024-01-02) default tolerance (0.001 units)

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/2/5/0/250633b48f2eac452deab011479192cc3e288654.jpeg)

what Rhino version are you using?

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/c/1/b/c1b432f4b5801bd4f5c830fd315e1eb82b4611a0.jpeg)

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<div class="post-metadata">

**Author:** ![Raisa\_Putri](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/raisa_putri/32/508934_2.png) [@Raisa\_Putri](https://discourse.mcneel.com/u/Raisa_Putri)\
**Post date:** [January 8, 2024, 3:46am UTC](https://discourse.mcneel.com/t/lofting-problems-twisted-result/172791/8 "2024-01-08T03:46:43Z")

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hello everyone.  
i think i’ve resolved my problems by trying to use the sweep2 command. thank you for all the replies and suggestions. appreciate it a lot.

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**Author:** ![saeed\_hasan\_zadeh](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/saeed_hasan_zadeh/32/632496_2.png) [@saeed\_hasan\_zadeh](https://discourse.mcneel.com/u/saeed_hasan_zadeh)\
**Post date:** [January 8, 2024, 4:26am UTC](https://discourse.mcneel.com/t/lofting-problems-twisted-result/172791/10 "2024-01-08T04:26:15Z")

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You tried to align seams?