# Why: Changing Sketch removes Extrusions?

**URL:** <https://discourse.shapr3d.com/t/why-changing-sketch-removes-extrusions/39174>\
**Category:** Modeling Questions\
**Created:** [August 18, 2025, 6:18am UTC](https://discourse.shapr3d.com/t/why-changing-sketch-removes-extrusions/39174 "2025-08-18T06:18:41Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![markofbitcoin](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/markofbitcoin/32/32928_2.png) [@markofbitcoin](https://discourse.shapr3d.com/u/markofbitcoin)\
**Post date:** [August 18, 2025, 6:18am UTC](https://discourse.shapr3d.com/t/why-changing-sketch-removes-extrusions/39174/1 "2025-08-18T06:18:41Z")

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I have a sketch I’ve used to do some various extrusions of a box wall to different levels, both positive and negative. I need the hole that is negative slightly larger. I seem to be able to change the width of the hole, but as soon as I try to change the height, all the extrusions _around_ the hole are wiped! And they don’t even seem to be connected or touching. (See video.) So what have I done wrong?

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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:** [August 18, 2025, 6:57am UTC](https://discourse.shapr3d.com/t/why-changing-sketch-removes-extrusions/39174/2 "2025-08-18T06:57:53Z")

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You’re giving just a small piece of information taken out of context and expecting someone to simply guess what your problem is?

You even cut the video in such a way that we can’t see what’s going on with your history — almost as if on purpose.

My answer to a question asked this way is: fix the errors in the history.

If you want us to really understand the problem and help you solve it, then provide the full information. You could start by uploading the project itself, so it can be opened and we can see exactly what’s happening there.

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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:** [August 18, 2025, 8:50am UTC](https://discourse.shapr3d.com/t/why-changing-sketch-removes-extrusions/39174/4 "2025-08-18T08:50:58Z")

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> [@markofbitcoin](#):
>
> Thanks, #@@hole.

You’re welcome. I’ve helped you before on this forum, but now I don’t think you deserve it.