# UV Editor edge straightening; edges are NOT straight

**URL:** <https://discourse.mcneel.com/t/uv-editor-edge-straightening-edges-are-not-straight/189165>\
**Category:** Rhino for Windows\
**Tags:** windows, uv-editor\
**Created:** [August 7, 2024, 9:02am UTC](https://discourse.mcneel.com/t/uv-editor-edge-straightening-edges-are-not-straight/189165 "2024-08-07T09:02:17Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![Charles](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/charles/32/772919_2.png) [@Charles](https://discourse.mcneel.com/u/Charles)\
**Post date:** [August 7, 2024, 9:02am UTC](https://discourse.mcneel.com/t/uv-editor-edge-straightening-edges-are-not-straight/189165/1 "2024-08-07T09:02:17Z")

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I unwrapped a surface in the UV Editor:

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/f/3/d/f3d34a0f0ee7a858425425488d1a019889153d42.png)

In the end I need a rectangular island, therefore I straighten the edges one by one.

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/5/2/f/52f8eb182fb4f8dc7ad9ba18149f9ed892f78227.png)

All edges are **not** straight.  
The helps tells me they should:

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/7/0/2/7028a9fcb4f17d492db8cebe9ce2d1ea856168d5.png)

[2024-08-07\_UV1.3dm](https://discourse.mcneel.com/uploads/short-url/f6OoQyYn7pJRmojz0YPSuqmkzNd.3dm) (316.8 KB)

@Jussi_Aaltonen ?

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**Author:** ![Jussi\_Aaltonen](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/jussi_aaltonen/32/494409_2.png) [@Jussi\_Aaltonen](https://discourse.mcneel.com/u/Jussi_Aaltonen)\
**Post date:** [August 8, 2024, 10:56am UTC](https://discourse.mcneel.com/t/uv-editor-edge-straightening-edges-are-not-straight/189165/2 "2024-08-08T10:56:13Z")

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Thanks for pointing that out. It’s true, they are made straighter but not collinear. I think that help page needs to be corrected. Also the text about Smooth command is probably a wish rather than reality.

[RH-83260](https://mcneel.myjetbrains.com/youtrack/issue/RH-83260) UV Editor straightening help wrong

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<div class="post-metadata">

**Author:** ![Jussi\_Aaltonen](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/jussi_aaltonen/32/494409_2.png) [@Jussi\_Aaltonen](https://discourse.mcneel.com/u/Jussi_Aaltonen)\
**Post date:** [August 8, 2024, 11:10am UTC](https://discourse.mcneel.com/t/uv-editor-edge-straightening-edges-are-not-straight/189165/3 "2024-08-08T11:10:49Z")

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You can draw lines for the sides and use curve constraints. They will give you more precise colinearity.

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**Author:** ![Charles](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/charles/32/772919_2.png) [@Charles](https://discourse.mcneel.com/u/Charles)\
**Post date:** [August 8, 2024, 11:28am UTC](https://discourse.mcneel.com/t/uv-editor-edge-straightening-edges-are-not-straight/189165/4 "2024-08-08T11:28:05Z")

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> [@Jussi\_Aaltonen](#):
>
> You can draw lines for the sides and use curve constraints. They will give you more precise colinearity.

Did so already…

While we are at that:

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/3/2/9/3293399ba9181141f1af94754ad2fd3b0abd4e6b.png)

The prompt says I have to select a **closed** curve.  
That’s not the case.

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<div class="post-metadata">

**Author:** ![Jussi\_Aaltonen](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/jussi_aaltonen/32/494409_2.png) [@Jussi\_Aaltonen](https://discourse.mcneel.com/u/Jussi_Aaltonen)\
**Post date:** [August 13, 2024, 6:34am UTC](https://discourse.mcneel.com/t/uv-editor-edge-straightening-edges-are-not-straight/189165/5 "2024-08-13T06:34:08Z")

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Thanks, logged it: [RH-83311](https://mcneel.myjetbrains.com/youtrack/issue/RH-83311) UV Editor: edge straightening prompt and behavior inconsistent

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**Author:** ![Charles](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/charles/32/772919_2.png) [@Charles](https://discourse.mcneel.com/u/Charles)\
**Post date:** [March 11, 2026, 8:58am UTC](https://discourse.mcneel.com/t/uv-editor-edge-straightening-edges-are-not-straight/189165/6 "2026-03-11T08:58:20Z")

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@Joachim_Kuntz

> [@Charles](#):
>
> ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/3/2/9/3293399ba9181141f1af94754ad2fd3b0abd4e6b.png)
> 
> The prompt says I have to select a **closed** curve.

This is still in German, in English it’s not about a _ **closed** _ curve.

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**Author:** ![Joachim\_Kuntz](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/joachim_kuntz/32/770485_2.png) [@Joachim\_Kuntz](https://discourse.mcneel.com/u/Joachim_Kuntz)\
**Post date:** [March 11, 2026, 9:26am UTC](https://discourse.mcneel.com/t/uv-editor-edge-straightening-edges-are-not-straight/189165/7 "2026-03-11T09:26:21Z")

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Thanks & fixed for the next build.