# Cut imported stl

**URL:** <https://discourse.shapr3d.com/t/cut-imported-stl/17523>\
**Category:** Modeling Questions\
**Created:** [February 19, 2022, 11:28am UTC](https://discourse.shapr3d.com/t/cut-imported-stl/17523 "2022-02-19T11:28:44Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Jonas](https://avatars.discourse-cdn.com/v4/letter/j/aeb1de/32.png) [@Jonas](https://discourse.shapr3d.com/u/Jonas)\
**Post date:** [February 19, 2022, 11:28am UTC](https://discourse.shapr3d.com/t/cut-imported-stl/17523/1 "2022-02-19T11:28:44Z")

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Hello i imported a stl skull but wanted to cut away parts .

How do you do it?  
Tried subract but get this error.  
Any work arround.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/8/833f1a7b7bc3c577b56b3ec5e04d4a05368771a8.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:** [February 19, 2022, 1:45pm UTC](https://discourse.shapr3d.com/t/cut-imported-stl/17523/2 "2022-02-19T13:45:06Z")

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Hi! _Sheet body_ means the mesh is not a closed solid body, it has an opening somewhere. Please repair/make it closed in a mesh editor, then you’ll be able to apply the boolean tools on it.

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<div class="post-metadata">

**Author:** ![Jonas](https://avatars.discourse-cdn.com/v4/letter/j/aeb1de/32.png) [@Jonas](https://discourse.shapr3d.com/u/Jonas)\
**Post date:** [February 19, 2022, 8:20pm UTC](https://discourse.shapr3d.com/t/cut-imported-stl/17523/3 "2022-02-19T20:20:09Z")

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Thank you.  
For the fast answer.  
I will check that.