# Applying LunchBox panels to a concave planar surface

**URL:** <https://discourse.mcneel.com/t/applying-lunchbox-panels-to-a-concave-planar-surface/108314>\
**Category:** Grasshopper\
**Created:** [September 8, 2020, 10:04am UTC](https://discourse.mcneel.com/t/applying-lunchbox-panels-to-a-concave-planar-surface/108314 "2020-09-08T10:04:05Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![andybenedikt](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/andybenedikt/32/454239_2.png) [@andybenedikt](https://discourse.mcneel.com/u/andybenedikt)\
**Post date:** [September 8, 2020, 10:04am UTC](https://discourse.mcneel.com/t/applying-lunchbox-panels-to-a-concave-planar-surface/108314/1 "2020-09-08T10:04:05Z")

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![grafik](https://global.discourse-cdn.com/mcneel/uploads/default/original/3X/3/b/3b18b14d044dacfc8760e54dfea411e77c225f6d.png)

So ive been trying to panelise all four surfaces, however i only get this:

 ![grafik](https://global.discourse-cdn.com/mcneel/uploads/default/original/3X/3/7/371c32924ef59fe1398fcfe44ad5dda81312cee6.png)

i have no idea why it tells me that it is a trimmed surface, i constructed it using curves…  
I tried using the “planar surface” command, aswell as “patch” and “network surface”, all of which give me a trimmed surface.

Is there any way to solve this?

any help would be greatly appreciated

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**Author:** ![wim](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/wim/32/747482_2.png) [@wim](https://discourse.mcneel.com/u/wim)\
**Post date:** [September 8, 2020, 10:07am UTC](https://discourse.mcneel.com/t/applying-lunchbox-panels-to-a-concave-planar-surface/108314/2 "2020-09-08T10:07:49Z")

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Hi - Please see this thread…

> [@Luchbox Surface Bug](https://discourse.mcneel.com/t/luchbox-surface-bug/108277):
>
> Hi! Does someone knows why the lunchbox plugin can’t recognize my surface? I supposed it was a common problem, but I have searched for it here and I haven’t found anything close to this. (I can see this problem even when I’m using isotrim to divide a surface, it always takes a big retangle arround my surface) If you can help me, thank you! [Limits|690x371](https://discourse.mcneel.com/uploads/short-url/gtsZWpcyhcFVtDnboNReZ7nwuXx.png)

-wim

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<div class="post-metadata">

**Author:** ![andybenedikt](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/andybenedikt/32/454239_2.png) [@andybenedikt](https://discourse.mcneel.com/u/andybenedikt)\
**Post date:** [September 8, 2020, 11:13am UTC](https://discourse.mcneel.com/t/applying-lunchbox-panels-to-a-concave-planar-surface/108314/3 "2020-09-08T11:13:26Z")

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Thanks for the quick response!! Unfortunately none of the links helped me, as I’m using planar surfaces, and they work with polysurfaces/breps, or I just didn’t know how to apply it to my specific scenario.

Im still learning to use grasshopper, so I’m kind of a newbie. Is there a node you could recommend using to untrim my surfaces?