# How would I create a concave face?

**URL:** <https://discourse.shapr3d.com/t/how-would-i-create-a-concave-face/19044>\
**Category:** Modeling Questions\
**Created:** [April 28, 2022, 12:47am UTC](https://discourse.shapr3d.com/t/how-would-i-create-a-concave-face/19044 "2022-04-28T00:47:34Z")\
**Posts on this page:** 15\
**Page:** 1

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**Author:** ![automatom](https://avatars.discourse-cdn.com/v4/letter/a/7ea924/32.png) [@automatom](https://discourse.shapr3d.com/u/automatom)\
**Post date:** [April 28, 2022, 12:47am UTC](https://discourse.shapr3d.com/t/how-would-i-create-a-concave-face/19044/1 "2022-04-28T00:47:35Z")

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I’m looking to create a concave lid for a box I’m making. I’ve messed around in Tinkercad subtracting a shrunk down half sphere from a square but it just makes a divot in the middle and the corners remain squared off. If I stretch the sphere to cover the whole lid, then it will take the straight edges off each face. I’ve recently got into Shapr3D and am just getting used to using the sketching as a base to my designs.

How would I go about doing this in Shapr3D? The closest example I can give is the top of the Xbox Series X. Is it at all possible? It seems like such a simple design to look at, but it actually seems really complex to replicate. Maybe I just don’t know the tool properly yet. Please help!

Thanks

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**Author:** ![Xiamen0592](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/xiamen0592/32/12386_2.png) [@Xiamen0592](https://discourse.shapr3d.com/u/Xiamen0592)\
**Post date:** [April 28, 2022, 1:07am UTC](https://discourse.shapr3d.com/t/how-would-i-create-a-concave-face/19044/2 "2022-04-28T01:07:59Z")

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The best way to help is to upload a video of about ten seconds, which can more intuitively show the problem you need to solve.

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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:** [April 28, 2022, 6:13am UTC](https://discourse.shapr3d.com/t/how-would-i-create-a-concave-face/19044/3 "2022-04-28T06:13:14Z")

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This might work. A simple guided loft.

[https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/f/f3fd80f1f724da8cae20d2fabe19af2a9d99e65c.mov](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/f/f3fd80f1f724da8cae20d2fabe19af2a9d99e65c.mov)

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**Author:** ![automatom](https://avatars.discourse-cdn.com/v4/letter/a/7ea924/32.png) [@automatom](https://discourse.shapr3d.com/u/automatom)\
**Post date:** [April 28, 2022, 12:17pm UTC](https://discourse.shapr3d.com/t/how-would-i-create-a-concave-face/19044/4 "2022-04-28T12:17:32Z")

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TigerMike, that looks promising! Is it working on both axis too?

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**Author:** ![welshsteve](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/welshsteve/32/16111_2.png) [@welshsteve](https://discourse.shapr3d.com/u/welshsteve)\
**Post date:** [April 28, 2022, 1:25pm UTC](https://discourse.shapr3d.com/t/how-would-i-create-a-concave-face/19044/5 "2022-04-28T13:25:37Z")

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With both curves identical the depression in the surface will be equal on both axis.

 ![Outline](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/f/f48bb96c4c46b7d9b9a18a36366ff163dde76994.jpeg)

 ![Lofted](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/b/b51524d6afb789477b392931821f8bfba762c80d.jpeg)

 ![Visualized](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/d/d5d4b663fefe0bffd312ca0271aee7d0c51b5126.jpeg)

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<div class="post-metadata">

**Author:** ![automatom](https://avatars.discourse-cdn.com/v4/letter/a/7ea924/32.png) [@automatom](https://discourse.shapr3d.com/u/automatom)\
**Post date:** [April 28, 2022, 6:42pm UTC](https://discourse.shapr3d.com/t/how-would-i-create-a-concave-face/19044/6 "2022-04-28T18:42:26Z")

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welshsteve! Dwi’n siarad Cymraeg! Diolch am y gymorth. That looks exactly what I wanted. I’m going to sketch it up now. Thanks so much dude

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**Author:** ![welshsteve](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/welshsteve/32/16111_2.png) [@welshsteve](https://discourse.shapr3d.com/u/welshsteve)\
**Post date:** [April 28, 2022, 7:00pm UTC](https://discourse.shapr3d.com/t/how-would-i-create-a-concave-face/19044/7 "2022-04-28T19:00:05Z")

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Mae croeso mawr i chi. Ychydig iawn o Gymraeg dwi’n siarad 🤣 🏴󠁧󠁢󠁷󠁬󠁳󠁿

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**Author:** ![automatom](https://avatars.discourse-cdn.com/v4/letter/a/7ea924/32.png) [@automatom](https://discourse.shapr3d.com/u/automatom)\
**Post date:** [May 1, 2022, 12:38am UTC](https://discourse.shapr3d.com/t/how-would-i-create-a-concave-face/19044/8 "2022-05-01T00:38:40Z")

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So I’ve been trying to recreate this and I’m wondering how you create a vertical sketch on the Z-axis like you’ve done there? So far my knowledge is limited to sketching on the XY axis and using extrude function to bring them to life

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**Author:** ![welshsteve](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/welshsteve/32/16111_2.png) [@welshsteve](https://discourse.shapr3d.com/u/welshsteve)\
**Post date:** [May 1, 2022, 3:16am UTC](https://discourse.shapr3d.com/t/how-would-i-create-a-concave-face/19044/9 "2022-05-01T03:16:12Z")

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Here’s a brief demo…

[![](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/c/3/c315561f506606e7cb15a0aea82fcd4b55bdf797.jpeg "Concave Surface HD 1080p") ](https://www.youtube.com/watch?v=z56myHaTP9w)

Any issues, please ask 🙂

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**Author:** ![Laci\_K](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/laci_k/32/8196_2.png) [@Laci\_K](https://discourse.shapr3d.com/u/Laci_K)\
**Post date:** [May 1, 2022, 5:41am UTC](https://discourse.shapr3d.com/t/how-would-i-create-a-concave-face/19044/10 "2022-05-01T05:41:37Z")

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Hi,

You can sketch on any plane, including construction planes, which can be rotated to any position you want. 🙂

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**Author:** ![automatom](https://avatars.discourse-cdn.com/v4/letter/a/7ea924/32.png) [@automatom](https://discourse.shapr3d.com/u/automatom)\
**Post date:** [May 1, 2022, 2:10pm UTC](https://discourse.shapr3d.com/t/how-would-i-create-a-concave-face/19044/11 "2022-05-01T14:10:59Z")

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Thanks guys! So you just change the view to front and then you’re sketching on the Z-axis. Pretty genius! Also thanks for that video Steve, I didn’t realise you could use Loft like that, almost like a 3D fill tool

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<div class="post-metadata">

**Author:** ![welshsteve](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/welshsteve/32/16111_2.png) [@welshsteve](https://discourse.shapr3d.com/u/welshsteve)\
**Post date:** [May 1, 2022, 4:22pm UTC](https://discourse.shapr3d.com/t/how-would-i-create-a-concave-face/19044/12 "2022-05-01T16:22:36Z")

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Yes, selecting front view will allow you to sketch on the Z-X plane.

Remember too that you can sketch on any plane regardless of its orientation by selecting it and pressing spacebar which will orient the entire view so that the selected sketch is co-planar with your screen ready to sketch on.

[![](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/f/6/f60d2b97ad38421ce1b2d2fc55da359b64a64c85.jpeg "Sketching on Planes HD 1080p") ](https://www.youtube.com/watch?v=ThYNaVEaPH4)

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<div class="post-metadata">

**Author:** ![automatom](https://avatars.discourse-cdn.com/v4/letter/a/7ea924/32.png) [@automatom](https://discourse.shapr3d.com/u/automatom)\
**Post date:** [May 1, 2022, 5:12pm UTC](https://discourse.shapr3d.com/t/how-would-i-create-a-concave-face/19044/13 "2022-05-01T17:12:28Z")

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Hmm interesting. I’m on the iPad and the spacebar shortcut doesn’t work. I wonder if it’s a different key as that would be super handy. Also, I miss moving objects with the direction keys like I used to do with Tinkercad. Do you know if this is possible in Shapr? I find it handy for precision stuff

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**Author:** ![welshsteve](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/welshsteve/32/16111_2.png) [@welshsteve](https://discourse.shapr3d.com/u/welshsteve)\
**Post date:** [May 1, 2022, 5:23pm UTC](https://discourse.shapr3d.com/t/how-would-i-create-a-concave-face/19044/14 "2022-05-01T17:23:41Z")

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I’m using a MacBook Air M1 and don’t use an iPad.

On my MacBook I can double tap a face or plane with two fingers instead of using the space bar.

On the iPad I think you double tap the face or plane with a single finger.

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**Author:** ![automatom](https://avatars.discourse-cdn.com/v4/letter/a/7ea924/32.png) [@automatom](https://discourse.shapr3d.com/u/automatom)\
**Post date:** [May 1, 2022, 5:24pm UTC](https://discourse.shapr3d.com/t/how-would-i-create-a-concave-face/19044/15 "2022-05-01T17:24:32Z")

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Indeed it does! Beautiful

I’ve only ever used the iPad Pro, pretty amazing what a 2018 model can still do! LumaFusion / Procreate / Shapr3D. All brilliant apps