# Bug when crating a drawing of a cutout

**URL:** <https://discourse.shapr3d.com/t/bug-when-crating-a-drawing-of-a-cutout/38144>\
**Category:** Modeling Questions\
**Created:** [May 28, 2025, 6:43am UTC](https://discourse.shapr3d.com/t/bug-when-crating-a-drawing-of-a-cutout/38144 "2025-05-28T06:43:15Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![msx3000](https://avatars.discourse-cdn.com/v4/letter/m/9f8e36/32.png) [@msx3000](https://discourse.shapr3d.com/u/msx3000)\
**Post date:** [May 28, 2025, 6:43am UTC](https://discourse.shapr3d.com/t/bug-when-crating-a-drawing-of-a-cutout/38144/1 "2025-05-28T06:43:15Z")

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I repeatedly have an issue when I make drawings of a tube with a linear cutout. The arc on both ends of the cutout is mirrored for no reason.  
In the preview of the projection angles everything is displayed as it should, but as soon as I select an angle (by pressing the + symbol) it mirrors the arcs at the end of the cutout.

Does anyone else have this bug?

 ![Image Kopie](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/4/9/496d8d91868b7b44d1c52d249b6daf316bb7feac.jpeg)

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**Author:** ![Xdrakosha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/xdrakosha/32/24881_2.png) [@Xdrakosha](https://discourse.shapr3d.com/u/Xdrakosha)\
**Post date:** [May 28, 2025, 6:45am UTC](https://discourse.shapr3d.com/t/bug-when-crating-a-drawing-of-a-cutout/38144/2 "2025-05-28T06:45:21Z")

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> [@2d drawing bug elements dont render correctly](https://discourse.shapr3d.com/t/2d-drawing-bug-elements-dont-render-correctly/38131):
>
> Hi there, i starded yesterday using shapr3d but i allready ran into a error after finishing my first model i wanted to create a 2d drawing but after placing the first view one of the key holes see the screenshot got inverted. Is this an known bug and how can i can fix is? If yes I‘m sorry i didn’t find any Article about this bug. Thank you for reading slight_smile

> [@Problem with drawings - Curve showing up odd](https://discourse.shapr3d.com/t/problem-with-drawings-curve-showing-up-odd/38030):
>
> Please see video here

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<div class="post-metadata">

**Author:** ![msx3000](https://avatars.discourse-cdn.com/v4/letter/m/9f8e36/32.png) [@msx3000](https://discourse.shapr3d.com/u/msx3000)\
**Post date:** [May 28, 2025, 6:49am UTC](https://discourse.shapr3d.com/t/bug-when-crating-a-drawing-of-a-cutout/38144/3 "2025-05-28T06:49:00Z")

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Thanks for pointing out the other threads, good t know that I’m not the only one with the issue. Lets hope this is an easy fix.

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**Author:** ![Xdrakosha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/xdrakosha/32/24881_2.png) [@Xdrakosha](https://discourse.shapr3d.com/u/Xdrakosha)\
**Post date:** [May 28, 2025, 6:58am UTC](https://discourse.shapr3d.com/t/bug-when-crating-a-drawing-of-a-cutout/38144/4 "2025-05-28T06:58:12Z")

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Just made a quick test and don’t get this kind of problem.

 ![IMG_0116](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/3/0/30c82fa23fadc387875f2a3a5119bad6c44cdfd7.png)  
 ![IMG_0117](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/a/1/a121f85018775fcc644816a8713a721624473eac.jpeg)

Everybody is complaining but non of them want to share their project to investigate the issue 🙂

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<div class="post-metadata">

**Author:** ![msx3000](https://avatars.discourse-cdn.com/v4/letter/m/9f8e36/32.png) [@msx3000](https://discourse.shapr3d.com/u/msx3000)\
**Post date:** [May 28, 2025, 7:36am UTC](https://discourse.shapr3d.com/t/bug-when-crating-a-drawing-of-a-cutout/38144/5 "2025-05-28T07:36:59Z")

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Hi,

I just prepared a file with one tube. The original file was larger I deleted all the other parts.

best regards

Matthias Schmidt

> **(attachments)**
>
> ![Schmidt_Logo_email.gif](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/a/c/ace5189709d574605e2456654958f400e8b2055d.gif)  
> [bug test drawing cutout mirrored arcs.shapr](https://discourse.shapr3d.com/uploads/short-url/zJdl0sqXdgeW6nrxXC2eyr3pLMP.shapr) (4.67 MB)

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<div class="post-metadata">

**Author:** ![Xdrakosha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/xdrakosha/32/24881_2.png) [@Xdrakosha](https://discourse.shapr3d.com/u/Xdrakosha)\
**Post date:** [May 28, 2025, 9:40am UTC](https://discourse.shapr3d.com/t/bug-when-crating-a-drawing-of-a-cutout/38144/6 "2025-05-28T09:40:23Z")

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I see where is the problem appear, will post as a bug to the S3D team just in case.

Meanwhile you can use two workarounds to eliminate this problem.

Draw arcs inside of rectangle, make them equal and tangent:

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/3/6/36667479f54fdcf5c5050308526d8f4997ecfc77.png)

Use filet after extrude

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/a/c/ac0ffdc42b5a5aae5d8cfc957609325274a69ca8.png)

Both approaches give correct result in drawing:

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/2/c/2c79d97757f7afe0b974d4a5b3ef2341fabe9d43.png)

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<div class="post-metadata">

**Author:** ![msx3000](https://avatars.discourse-cdn.com/v4/letter/m/9f8e36/32.png) [@msx3000](https://discourse.shapr3d.com/u/msx3000)\
**Post date:** [May 28, 2025, 11:15am UTC](https://discourse.shapr3d.com/t/bug-when-crating-a-drawing-of-a-cutout/38144/7 "2025-05-28T11:15:27Z")

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Thanks Alex, for pointing out the workaround. I’ll try that later. 👍