# Shell Bug?

**URL:** <https://discourse.shapr3d.com/t/shell-bug/17389>\
**Category:** Modeling Questions\
**Created:** [February 13, 2022, 8:01am UTC](https://discourse.shapr3d.com/t/shell-bug/17389 "2022-02-13T08:01:35Z")\
**Posts on this page:** 9\
**Page:** 1

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**Author:** ![SM1](https://avatars.discourse-cdn.com/v4/letter/s/9de0a6/32.png) [@SM1](https://discourse.shapr3d.com/u/SM1)\
**Post date:** [February 13, 2022, 8:01am UTC](https://discourse.shapr3d.com/t/shell-bug/17389/1 "2022-02-13T08:01:35Z")

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I made a video here: [Bug - YouTube](https://youtu.be/TUWL4oCsAOM)

Trying to make a 0.2 cm shell on two bodies that are the same. The one on the left for some reason only works at a certain rotation? 😅

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**Author:** ![KPeter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/kpeter/32/7644_2.png) [@KPeter](https://discourse.shapr3d.com/u/KPeter)\
**Post date:** [February 13, 2022, 12:40pm UTC](https://discourse.shapr3d.com/t/shell-bug/17389/2 "2022-02-13T12:40:54Z")

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Hmm, could you please upload the Shapr3D design here or [share it with us privately](https://support.shapr3d.com/hc/en-us/requests/new)?

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**Author:** ![TigerMike](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tigermike/32/32650_2.png) [@TigerMike](https://discourse.shapr3d.com/u/TigerMike)\
**Post date:** [February 13, 2022, 3:41pm UTC](https://discourse.shapr3d.com/t/shell-bug/17389/3 "2022-02-13T15:41:01Z")

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Out of curiosity, did you make the 3 bodies from a single one to start with?  
Or, did you make one and then use Copy-Rotate to create the others?  
Or, did you use the Mirror tool an any time?

I ask because I too recall having a similar issue when I used the Mirror tool.

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**Author:** ![SM1](https://avatars.discourse-cdn.com/v4/letter/s/9de0a6/32.png) [@SM1](https://discourse.shapr3d.com/u/SM1)\
**Post date:** [February 13, 2022, 5:11pm UTC](https://discourse.shapr3d.com/t/shell-bug/17389/4 "2022-02-13T17:11:16Z")

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Yeah here:  
[Test1.shapr](https://discourse.shapr3d.com/uploads/short-url/gnhnPbNpoWzgoI6uhjG4uRHpns2.shapr) (220.5 KB)

Don’t mind the first object, I sometimes just make multiple different objects for ideas 😅

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**Author:** ![SM1](https://avatars.discourse-cdn.com/v4/letter/s/9de0a6/32.png) [@SM1](https://discourse.shapr3d.com/u/SM1)\
**Post date:** [February 13, 2022, 5:15pm UTC](https://discourse.shapr3d.com/t/shell-bug/17389/5 "2022-02-13T17:15:45Z")

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Yeah I started from one revolve and did split body. Maybe it was because the sketch itself wasn’t very geometric? I used a spline for the curve

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**Author:** ![TigerMike](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tigermike/32/32650_2.png) [@TigerMike](https://discourse.shapr3d.com/u/TigerMike)\
**Post date:** [February 13, 2022, 6:39pm UTC](https://discourse.shapr3d.com/t/shell-bug/17389/6 "2022-02-13T18:39:11Z")

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I partially recreated your truncated egg shape using Revolve and Split-Body from a spline sketch.  
Interesting how one side I can dimension a shell wall thickness and the other cannot. The interaction of moving the Shell arrow speaks for itself.  
[ShellTest.shapr](https://discourse.shapr3d.com/uploads/short-url/vRKAcfM5rnaCT2aypKB55iwWVVG.shapr) (16.3 KB)

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**Author:** ![TigerMike](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tigermike/32/32650_2.png) [@TigerMike](https://discourse.shapr3d.com/u/TigerMike)\
**Post date:** [February 13, 2022, 6:43pm UTC](https://discourse.shapr3d.com/t/shell-bug/17389/7 "2022-02-13T18:43:16Z")

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Here’s my work around.

[https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/a/a505ee7f6dc66d5c7cbcd9deb60ca60c22b28b73.mov](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/a/a505ee7f6dc66d5c7cbcd9deb60ca60c22b28b73.mov)

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<div class="post-metadata">

**Author:** ![SM1](https://avatars.discourse-cdn.com/v4/letter/s/9de0a6/32.png) [@SM1](https://discourse.shapr3d.com/u/SM1)\
**Post date:** [February 13, 2022, 7:01pm UTC](https://discourse.shapr3d.com/t/shell-bug/17389/8 "2022-02-13T19:01:02Z")

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Yeah it’s an interesting bug to say the least haha

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**Author:** ![TigerMike](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tigermike/32/32650_2.png) [@TigerMike](https://discourse.shapr3d.com/u/TigerMike)\
**Post date:** [February 13, 2022, 7:01pm UTC](https://discourse.shapr3d.com/t/shell-bug/17389/9 "2022-02-13T19:01:22Z")

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Sorry, can’t help myself 😀

[https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/4/432e96f41d446a80869d759d0cc543ae38eb8ab7.mov](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/4/432e96f41d446a80869d759d0cc543ae38eb8ab7.mov)