# Issue with the Boundary option of Custom Preview Components

**URL:** <https://discourse.mcneel.com/t/issue-with-the-boundary-option-of-custom-preview-components/200924>\
**Category:** Grasshopper\
**Created:** [March 7, 2025, 3:03pm UTC](https://discourse.mcneel.com/t/issue-with-the-boundary-option-of-custom-preview-components/200924 "2025-03-07T15:03:31Z")\
**Posts on this page:** 11\
**Page:** 1

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**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:** [March 7, 2025, 3:03pm UTC](https://discourse.mcneel.com/t/issue-with-the-boundary-option-of-custom-preview-components/200924/1 "2025-03-07T15:03:31Z")

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@kike, I think there’s something wrong with the new component when using the preview boundary option…

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/4/b/6/4b62b05cdefd5badc69bd0e84813a85b2fd7f0bb.jpeg)

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/9/4/0/940678076ff43e351291a01838fda895bb784e5b.jpeg)

[new\_custom\_preview\_component\_issues.gh](https://discourse.mcneel.com/uploads/short-url/eI0U5pEr0GZ2MYTYXG7d4t082iK.gh) (9.9 KB)

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**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:** [June 11, 2025, 10:13am UTC](https://discourse.mcneel.com/t/issue-with-the-boundary-option-of-custom-preview-components/200924/2 "2025-06-11T10:13:37Z")

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![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/a/8/4/a84df2d4cbf48e8832750246d4654404df4fe222.jpeg)

@kike this is messed up

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**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:** [December 31, 2025, 10:30am UTC](https://discourse.mcneel.com/t/issue-with-the-boundary-option-of-custom-preview-components/200924/3 "2025-12-31T10:30:29Z")

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Still a problem

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/9/7/3/973dd7fefdb2f5001623e54858eea74f073c563f.png)

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**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:** [March 24, 2026, 11:09pm UTC](https://discourse.mcneel.com/t/issue-with-the-boundary-option-of-custom-preview-components/200924/5 "2026-03-24T23:09:28Z")

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@kike can you please take a look?

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**Author:** ![Volker\_Rakow](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/volker_rakow/32/758767_2.png) [@Volker\_Rakow](https://discourse.mcneel.com/u/Volker_Rakow)\
**Post date:** [March 25, 2026, 12:00am UTC](https://discourse.mcneel.com/t/issue-with-the-boundary-option-of-custom-preview-components/200924/6 "2026-03-25T00:00:33Z")

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This is the _new_ Custom Preview component?

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**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:** [March 25, 2026, 12:02am UTC](https://discourse.mcneel.com/t/issue-with-the-boundary-option-of-custom-preview-components/200924/7 "2026-03-25T00:02:39Z")

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Yes this is a new one but available for a while already

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/1/3/f/13fe4d36425bcb15d6f3f5ed12c0033d0934ce28.png)

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<div class="post-metadata">

**Author:** ![Volker\_Rakow](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/volker_rakow/32/758767_2.png) [@Volker\_Rakow](https://discourse.mcneel.com/u/Volker_Rakow)\
**Post date:** [March 25, 2026, 12:04am UTC](https://discourse.mcneel.com/t/issue-with-the-boundary-option-of-custom-preview-components/200924/8 "2026-03-25T00:04:16Z")

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Thank you.

How are we supposed to know about these new components that are not in panels?

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**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:** [March 25, 2026, 12:13am UTC](https://discourse.mcneel.com/t/issue-with-the-boundary-option-of-custom-preview-components/200924/9 "2026-03-25T00:13:11Z")

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I have no idea. @kike mentioned it in a comment a year ago

> [@Transparency of GH objects is ...not transparent](https://discourse.mcneel.com/t/transparency-of-gh-objects-is-not-transparent/118522/15):
>
> Hi @osuire, There is a new ‘Custom Preview’ component in Rhino 9 that does not care about object order. The component is hidden by now but you can try it typing #Custom Preview (WIP) on the canvas.

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**Author:** ![kike](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/kike/32/608657_2.png) [@kike](https://discourse.mcneel.com/u/kike)\
**Post date:** [March 25, 2026, 8:59am UTC](https://discourse.mcneel.com/t/issue-with-the-boundary-option-of-custom-preview-components/200924/10 "2026-03-25T08:59:13Z")

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Hi @martinsiegrist,

This is not a new issue on this component.  
The previous ‘Custom Preview’ component behaves same way.

But we may try to fix both.

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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:** [March 25, 2026, 9:09am UTC](https://discourse.mcneel.com/t/issue-with-the-boundary-option-of-custom-preview-components/200924/11 "2026-03-25T09:09:21Z")

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> [@kike](#):
>
> But we may try to fix both.

Thanks. It’s been a problem for a while. My topic is also from a year ago…

I changed the topic title

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**Author:** ![kike](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/kike/32/608657_2.png) [@kike](https://discourse.mcneel.com/u/kike)\
**Post date:** [March 25, 2026, 10:49am UTC](https://discourse.mcneel.com/t/issue-with-the-boundary-option-of-custom-preview-components/200924/12 "2026-03-25T10:49:29Z")

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Pushing a fix for the next v9 WIP.