# Shell refuse create hollow object

**URL:** <https://discourse.shapr3d.com/t/shell-refuse-create-hollow-object/20350>\
**Category:** Modeling Questions\
**Created:** [July 14, 2022, 6:51pm UTC](https://discourse.shapr3d.com/t/shell-refuse-create-hollow-object/20350 "2022-07-14T18:51:47Z")\
**Posts on this page:** 1\
**Showing post:** 7

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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:** [July 15, 2022, 5:43am UTC](https://discourse.shapr3d.com/t/shell-refuse-create-hollow-object/20350/7 "2022-07-15T05:43:28Z")

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Hey @JakubUrban! The shell tool prefers simpler shapes, applying the tool on complex polysurfaces may not result in a solid body - which I think is the problem in this case.  
The crash also should be strictly connected to the complexity of the model, Parasolid tries to solve the issue then it runs out of RAM.

There was a similar thread at the beginning of the year, let me share it with you:

> [@Can't create a thicker shell](https://discourse.shapr3d.com/t/cant-create-a-thicker-shell/17072):
>
> Good afternoon (o; Having this as a base body for a speaker case: But when I want to create a shell the limit is here 3mm thickness…but even then it creates holes in the body: [Bildschirmfoto 2022-01-26 um 12.11.27] And from the inside it looks I wouldn’t expect at all: So don’t know why it creates those strange cutouts inside…which look like an extension from the cutout at the front corners… Any ideas why …

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_[View the full topic](https://discourse.shapr3d.com/t/shell-refuse-create-hollow-object/20350)._