# Make stl into solid and smooth surface

**URL:** <https://discourse.slicer.org/t/make-stl-into-solid-and-smooth-surface/15515>\
**Category:** Support\
**Created:** [January 14, 2021, 2:22am UTC](https://discourse.slicer.org/t/make-stl-into-solid-and-smooth-surface/15515 "2021-01-14T02:22:12Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![Valentina\_Mejia\_Gall](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/valentina_mejia_gall/32/8759_2.png) [@Valentina\_Mejia\_Gall](https://discourse.slicer.org/u/Valentina_Mejia_Gall)\
**Post date:** [January 19, 2021, 2:29am UTC](https://discourse.slicer.org/t/make-stl-into-solid-and-smooth-surface/15515/5 "2021-01-19T02:29:24Z")

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Hello Andras,  
I have a question, searching in the forum I came across this article about how to save and convert the vkt file into a volumetric mesh, but I don’t know how to manipulate 3dSlicer with code.  
Is there a program or a tutorial on how to do that process?

Article

> [@Convert a surface mesh to a volumetric mesh in 3D Slicer](https://discourse.slicer.org/t/convert-a-surface-mesh-to-a-volumetric-mesh-in-3d-slicer/1416/10):
>
> ICEM can import surface meshes (STL files) - see for example [this](https://www.cfd-online.com/Forums/ansys-meshing/77427-meshing-stl-surface-icem.html) old forum topic. Segment Mesher can generate tetrahedral meshes that you can save in VTK unstructured grid (.vtu) file format. You may need a mesh conversion utility to convert it to a file format that can be read by your FEM software.

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