# Setting Wall Thickness for a 3D print model, on Shapr for iPad

**URL:** <https://discourse.shapr3d.com/t/setting-wall-thickness-for-a-3d-print-model-on-shapr-for-ipad/33712>\
**Category:** Modeling Questions\
**Created:** [September 12, 2024, 8:15pm UTC](https://discourse.shapr3d.com/t/setting-wall-thickness-for-a-3d-print-model-on-shapr-for-ipad/33712 "2024-09-12T20:15:04Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![Doc3Dee](https://avatars.discourse-cdn.com/v4/letter/d/bcef8e/32.png) [@Doc3Dee](https://discourse.shapr3d.com/u/Doc3Dee)\
**Post date:** [September 12, 2024, 8:15pm UTC](https://discourse.shapr3d.com/t/setting-wall-thickness-for-a-3d-print-model-on-shapr-for-ipad/33712/1 "2024-09-12T20:15:04Z")

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Hello! I am brand new to the world of CAD, 3D printing, and Shapr. I used Sketchup years ago for woodworking but it was only a few times.

I am currently using Shapr3D on my iPad Pro, on the free account (I’m thinking about upgrading but not settled yet). I am wanting to create a small tray for water tests that I use for my saltwater aquarium that I want to print on a new 3D Printer for myself. I have it designed most of the way.

How will I know if the product is “hollow” or if it’s solid? If it is “hollow,” how can I determine the thickness of the walls?

Also, are there tutorials for Shapr Noobies / Shapr Dummies? I did the tutorials when you first download the app but I need more handholding than that, for now lol

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**Author:** ![jean-philippe2](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/jean-philippe2/32/27353_2.png) [@jean-philippe2](https://discourse.shapr3d.com/u/jean-philippe2)\
**Post date:** [September 12, 2024, 10:31pm UTC](https://discourse.shapr3d.com/t/setting-wall-thickness-for-a-3d-print-model-on-shapr-for-ipad/33712/2 "2024-09-12T22:31:35Z")

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Hi and welcome !

I think you want to say : Hollow is sketch and solid is body.  
See the link below.  
[Solid modeling](https://support.shapr3d.com/hc/en-us/articles/14030467197724-Solid-Modeling#description)

> [@Doc3Dee](#):
>
> How will I know if the product is “hollow” or if it’s solid? If it is “hollow,” how can I determine the thickness of the walls?

Use Menu Tool \> Extrude

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<div class="post-metadata">

**Author:** ![Doc3Dee](https://avatars.discourse-cdn.com/v4/letter/d/bcef8e/32.png) [@Doc3Dee](https://discourse.shapr3d.com/u/Doc3Dee)\
**Post date:** [September 12, 2024, 11:37pm UTC](https://discourse.shapr3d.com/t/setting-wall-thickness-for-a-3d-print-model-on-shapr-for-ipad/33712/3 "2024-09-12T23:37:10Z")

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Thanks for the video link. I need one dumbed down more than that. Yea, I know this is a CAD program and not Tinker software lol. I can’t even follow why he was doing what he was doing and what all the terms mean.

Thank you again for the link though!

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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:** [September 13, 2024, 12:23am UTC](https://discourse.shapr3d.com/t/setting-wall-thickness-for-a-3d-print-model-on-shapr-for-ipad/33712/4 "2024-09-13T00:23:15Z")

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Also welcome.

Here’s a simple tray I made on my iPad Pro. It is 6" x 8" x 1" deep with a wall thickness of my choosing, 0.1". After making a rectangle sketch 6x8 you can extrude to a thickness of 1". I did a secondary operation after the extrude and made the top surface with a 10° draft.  
After that, use the **Shell** tool to determine the wall thickness.

To show some versatility, I undid the shell and made a fillet radius on all 4 corners followed by a shell at 0.1" wall thickness. The part has nice radii at the corners and is suitable for 3D printing.

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<div class="post-metadata">

**Author:** ![Doc3Dee](https://avatars.discourse-cdn.com/v4/letter/d/bcef8e/32.png) [@Doc3Dee](https://discourse.shapr3d.com/u/Doc3Dee)\
**Post date:** [September 13, 2024, 2:15am UTC](https://discourse.shapr3d.com/t/setting-wall-thickness-for-a-3d-print-model-on-shapr-for-ipad/33712/5 "2024-09-13T02:15:26Z")

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Thank you for that! Very helpful way to see what you were doing. If I wanted to make a tray with a solid top but had spaces for bottles or specific sizes of things - think a rectangle with holes in it - could I do it using the shell feature? I know that’s not right lol but it’s what I can think of at the moment.

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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:** [September 13, 2024, 3:36am UTC](https://discourse.shapr3d.com/t/setting-wall-thickness-for-a-3d-print-model-on-shapr-for-ipad/33712/6 "2024-09-13T03:36:31Z")

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Shell will not work making pockets from a solid top. One way is to do a reverse extrude. Sketch geometries on the solid top and extrude downward.

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<div class="post-metadata">

**Author:** ![Doc3Dee](https://avatars.discourse-cdn.com/v4/letter/d/bcef8e/32.png) [@Doc3Dee](https://discourse.shapr3d.com/u/Doc3Dee)\
**Post date:** [September 13, 2024, 4:00am UTC](https://discourse.shapr3d.com/t/setting-wall-thickness-for-a-3d-print-model-on-shapr-for-ipad/33712/7 "2024-09-13T04:00:32Z")

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Ok. Thank you for your help!! Very appreciated!!