# Calculating the volume of pores in areas of huge stl files

**URL:** https://discourse.paraview.org/t/calculating-the-volume-of-pores-in-areas-of-huge-stl-files/9370
**Category:** ParaView Support
**Created:** [April 6, 2022, 9:49am UTC](https://discourse.paraview.org/t/calculating-the-volume-of-pores-in-areas-of-huge-stl-files/9370 "2022-04-06T09:49:21Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![Terry](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/t/b9e5f3/32.png) [@Terry](https://discourse.paraview.org/u/Terry)
#### Post date: [April 20, 2022, 9:16am UTC](https://discourse.paraview.org/t/calculating-the-volume-of-pores-in-areas-of-huge-stl-files/9370/2 "2022-04-20T09:16:32Z")

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Dear all,

I think I got a step forward.  
The new approach:  
connectivity filter (cell count descending)  
thresholds filter (min 1 to cut out out the overall cylinder)  
programmableFilter using this script:  
[Paraview Forum Post](https://discourse.paraview.org/t/calculate-volume-of-tetrahedral-mesh-regions/2609/2)

Only problem that it spits out zero for every regions volume. Any Ideas?

Kind Reards,  
Teresa

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