# Offset Mesh fail?

**URL:** <https://discourse.mcneel.com/t/offset-mesh-fail/166241>\
**Category:** Grasshopper\
**Tags:** windows, pufferfish, sasquatch\
**Created:** [September 26, 2023, 11:12am UTC](https://discourse.mcneel.com/t/offset-mesh-fail/166241 "2023-09-26T11:12:53Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![ctu6](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/ctu6/32/603653_2.png) [@ctu6](https://discourse.mcneel.com/u/ctu6)\
**Post date:** [September 26, 2023, 11:12am UTC](https://discourse.mcneel.com/t/offset-mesh-fail/166241/1 "2023-09-26T11:12:53Z")

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Coming from this [thread](https://discourse.mcneel.com/t/offset-brep-error/164408).

So after many fails with Offset Breps, some suggest to try with Offset Mesh.  
And here’s the result:  
[offset mesh.gh](https://discourse.mcneel.com/uploads/short-url/3uuvLUzcSsksLZxHqSW2jjA3VAG.gh) (96.9 KB)

 ![圖片](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/c/5/b/c5bb2b8e593b8e000d548a0d63f78b0f4eccf46a.png)  
 ![圖片](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/0/f/2/0f292d249eb634bc61d0c967b1ebba6eea223d75.png)

Any ideas why it can’t be a clean offset but a strange triangle corner left?

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<div class="post-metadata">

**Author:** ![martinsiegrist](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/martinsiegrist/32/498369_2.png) [@martinsiegrist](https://discourse.mcneel.com/u/martinsiegrist)\
**Post date:** [September 26, 2023, 11:28am UTC](https://discourse.mcneel.com/t/offset-mesh-fail/166241/2 "2023-09-26T11:28:20Z")

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What’s the result used for?

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<div class="post-metadata">

**Author:** ![ctu6](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/ctu6/32/603653_2.png) [@ctu6](https://discourse.mcneel.com/u/ctu6)\
**Post date:** [September 27, 2023, 7:20am UTC](https://discourse.mcneel.com/t/offset-mesh-fail/166241/3 "2023-09-27T07:20:11Z")

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building interior finishing layer construct

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<div class="post-metadata">

**Author:** ![martinsiegrist](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/martinsiegrist/32/498369_2.png) [@martinsiegrist](https://discourse.mcneel.com/u/martinsiegrist)\
**Post date:** [September 27, 2023, 8:13am UTC](https://discourse.mcneel.com/t/offset-mesh-fail/166241/4 "2023-09-27T08:13:51Z")

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Ok, so this will have to be split into plywood panels or something similar?