# Cant Extrude and other stuff

**URL:** <https://discourse.shapr3d.com/t/cant-extrude-and-other-stuff/10969>\
**Category:** Modeling Questions\
**Created:** [January 22, 2021, 9:15pm UTC](https://discourse.shapr3d.com/t/cant-extrude-and-other-stuff/10969 "2021-01-22T21:15:35Z")\
**Posts on this page:** 10\
**Page:** 1

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**Author:** ![juhu031167](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/juhu031167/32/3901_2.png) [@juhu031167](https://discourse.shapr3d.com/u/juhu031167)\
**Post date:** [January 22, 2021, 9:15pm UTC](https://discourse.shapr3d.com/t/cant-extrude-and-other-stuff/10969/1 "2021-01-22T21:15:35Z")

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![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/c/c2628832483c9e483fafca59e741d74dfa6e10d9.jpeg) Honestly, the app makes me crazy lately. I do understand that its simplicity and accessability comes at a price, and there is a limit building very complex things. But that is the deal, that is why I am using shapr, not other software. Anyways: Now also simple operations do not work. I drew stuff the other day that took me hours only to learn upon export that there is some sort of error and a part cannot be exported. Ya, thanks! No explaination, no hint how to solve this. Hours of work down the drain.

Today I challenged the app with a crazy thing: rectangles! Whoa! The attached screenshot shows what I complex madness am trying to do: extrude the highlighted area inwards. Not gonna happen. Either I extrude all the way through the material until a whole is built, or NOTHING is happening. (Yes I did type in a low value) And this process is only the workaround for my previous approach to build up the shape with several extruded rectangles that were supposed to merged with the base plane. No way. Would not work. Merging did not work. „Nicht mannigfaltiges Ergebnis“ shapr says. I would really love to learn what this sentence means. (Please talk to your translaters to fix this, it makes absolutely no sense!)

What is wrong lately? I did manage to build some complex stuff in the past, but get more and more frustrated recently as even very simple tasks fail.

Jürgen

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**Author:** ![Istvan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/istvan/32/23668_2.png) [@Istvan](https://discourse.shapr3d.com/u/Istvan)\
**Post date:** [January 22, 2021, 9:24pm UTC](https://discourse.shapr3d.com/t/cant-extrude-and-other-stuff/10969/2 "2021-01-22T21:24:40Z")

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Because cutting it out would create a non manifold body. [https://transmagic.com/what-is-non-manifold-geometry/](https://transmagic.com/what-is-non-manifold-geometry/)

In the corners the material’s thickness would be 0, where the hand’s and the cutting shape’s corners meet. Either move the corners a little bit, or offset the entire sketch a bit. We should definitely send an error message in this case, warning that the cut is not possible because of this non manifold issue.

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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:** [January 22, 2021, 10:29pm UTC](https://discourse.shapr3d.com/t/cant-extrude-and-other-stuff/10969/3 "2021-01-22T22:29:59Z")

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Here is a possible workaround. Do an **Extrude** raising it some amount and make it a **New Body**. Then move that new body down however depth you desire and then do a **Subtract**.  
-Mike

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**Author:** ![Istvan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/istvan/32/23668_2.png) [@Istvan](https://discourse.shapr3d.com/u/Istvan)\
**Post date:** [January 23, 2021, 9:44am UTC](https://discourse.shapr3d.com/t/cant-extrude-and-other-stuff/10969/4 "2021-01-23T09:44:49Z")

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The body would be still non manifold. The inner profile has to be changed, eg offseted a little bit.

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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:** [January 23, 2021, 3:29pm UTC](https://discourse.shapr3d.com/t/cant-extrude-and-other-stuff/10969/5 "2021-01-23T15:29:18Z")

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I stand corrected. I gave it a try to see for myself and yes, **Subtract** would not work unless I modified the body I wish to subtract. Thanks for clarifying.  
-Mike

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**Author:** ![Yepher](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/yepher/32/8902_2.png) [@Yepher](https://discourse.shapr3d.com/u/Yepher)\
**Post date:** [January 23, 2021, 3:36pm UTC](https://discourse.shapr3d.com/t/cant-extrude-and-other-stuff/10969/6 "2021-01-23T15:36:39Z")

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I find myself in states where it is difficult to see where the problem is. A better error message would be helpful but I would find highlighting the point(s) where the operation is blocked so I don’t have to zoom and search could be super helpful to accomplish the task the user is clearly seeking to do. I say make it obvious.

A similar issue I’ve curse to myself about (because I am clumsy) is when I am tracing a detailed spline there are times where it does not completely connect to the previous spline. I don’t want to admit how long it took me to find the missing connections on this project before I could extrude them. (maybe there is already an easy way that I am just not aware of?)

[Coaster A v3.shapr](https://discourse.shapr3d.com/uploads/short-url/vS3SWphQjnhCTYqn3Tr525KP9qy.shapr) (9.2 MB)

I hope I don’t come off as complaining (too much). _This is meant as constructive criticism_ because I love Shapr3D ❤

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**Author:** ![Creative8eight](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/creative8eight/32/15379_2.png) [@Creative8eight](https://discourse.shapr3d.com/u/Creative8eight)\
**Post date:** [May 27, 2022, 8:17am UTC](https://discourse.shapr3d.com/t/cant-extrude-and-other-stuff/10969/7 "2022-05-27T08:17:33Z")

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Any ideas why i cant extrude up , when I try it goes brown or yellow in 2d

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/f/fa03abe76e476e514cda2de43f6614d2a85ffaa3.jpeg)

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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:** [May 27, 2022, 8:20am UTC](https://discourse.shapr3d.com/t/cant-extrude-and-other-stuff/10969/8 "2022-05-27T08:20:34Z")

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Hi,  
I think you have accidentally turned on the Section View. Please turn it off by tapping/clicking on the icon of it or the popup in the upper section of the screen.

> **[What is Section view?](https://support.shapr3d.com/hc/en-us/articles/360008543033-What-is-Section-view-)**
>
> ℹ️ This feature is available to all users.
> A section view is a view that shows the internal parts of 3D bodies in a design. It looks as if you cut through an entire length of the design. You can us...

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<div class="post-metadata">

**Author:** ![Creative8eight](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/creative8eight/32/15379_2.png) [@Creative8eight](https://discourse.shapr3d.com/u/Creative8eight)\
**Post date:** [May 27, 2022, 8:36am UTC](https://discourse.shapr3d.com/t/cant-extrude-and-other-stuff/10969/9 "2022-05-27T08:36:24Z")

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ha! simples, thanks

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**Author:** ![MiniMotoGuy](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/minimotoguy/32/13560_2.png) [@MiniMotoGuy](https://discourse.shapr3d.com/u/MiniMotoGuy)\
**Post date:** [January 2, 2023, 7:46am UTC](https://discourse.shapr3d.com/t/cant-extrude-and-other-stuff/10969/10 "2023-01-02T07:46:16Z")

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That’s a great idea…identifying and letting the user know where the operation is blocked.  
May be harder to implement this great idea than we know…I also ❤ Shapr3D! 🙂