# Modifying Surface Model

**URL:** <https://discourse.slicer.org/t/modifying-surface-model/2922>\
**Category:** Support\
**Created:** [May 24, 2018, 6:49pm UTC](https://discourse.slicer.org/t/modifying-surface-model/2922 "2018-05-24T18:49:34Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Hikmat](https://avatars.discourse-cdn.com/v4/letter/h/ecccb3/32.png) [@Hikmat](https://discourse.slicer.org/u/Hikmat)\
**Post date:** [May 24, 2018, 6:49pm UTC](https://discourse.slicer.org/t/modifying-surface-model/2922/1 "2018-05-24T18:49:34Z")

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Operating system: Windows 10  
Slicer version: 4.8.1

I have a Model - it is a surface mesh (meaning it is just comprised of a surface).  
I would like to modify my model so that it is “solidified” (meaning it is no longer hollow but a solid model)  
How can I essentially fill the volume inside my surface model?

Thanks.