# Slice/clip with surface not working
**URL:** https://discourse.paraview.org/t/slice-clip-with-surface-not-working/16004
**Category:** ParaView Support
**Created:** [January 20, 2025, 4:59pm UTC](https://discourse.paraview.org/t/slice-clip-with-surface-not-working/16004 "2025-01-20T16:59:16Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@otaolafr](https://discourse.paraview.org/u/otaolafr)
#### Post date: [January 20, 2025, 4:59pm UTC](https://discourse.paraview.org/t/slice-clip-with-surface-not-working/16004/1 "2025-01-20T16:59:16Z")
Hello,
I would like to do [this](https://discourse.paraview.org/t/slice-clip-with-a-surface/9436/2) with a surface created from the filter connectivity (use the freesurface to cut my volume) [extract interface between water and air - #3 by Kenneth\_Moreland](https://discourse.paraview.org/t/extract-interface-between-water-and-air/15980/3)
Is this possible? the type of the connectivity output is unstructured grid. not sure if I should transform this data to a specific format. I am not getting any error but I also not getting anything as ouput
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [January 20, 2025, 5:01pm UTC](https://discourse.paraview.org/t/slice-clip-with-surface-not-working/16004/2 "2025-01-20T17:01:09Z")
This should be possible, please share your data.
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### Author:  [@otaolafr](https://discourse.paraview.org/u/otaolafr)
#### Post date: [January 20, 2025, 5:02pm UTC](https://discourse.paraview.org/t/slice-clip-with-surface-not-working/16004/3 "2025-01-20T17:02:33Z")
hello mathieu,
exactly the same data you just replied in this thread [issue with following height of free surface in VOF simulation, paraview crashes when using plot over time](https://discourse.paraview.org/t/issue-with-following-height-of-free-surface-in-vof-simulation-paraview-crashes-when-using-plot-over-time/16003)
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### Author:  [@otaolafr](https://discourse.paraview.org/u/otaolafr)
#### Post date: [January 26, 2025, 4:52pm UTC](https://discourse.paraview.org/t/slice-clip-with-surface-not-working/16004/4 "2025-01-26T16:52:52Z")
hello mathieu,
any inputs in this regards? normally the files are still up. I need to calculate the gas holdup of my reactor (so the total volume down the free surface of the liquid/gas interphase) and it is the only way i find logic to do (if i do a threashold of 0.5 it will ‘remove’ cells inside the fluid part that are filled with gas (and i dont want this).
regards
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [August 5, 2025, 1:30pm UTC](https://discourse.paraview.org/t/slice-clip-with-surface-not-working/16004/5 "2025-08-05T13:30:52Z")
I’m afraid files are not up anymore.