# 'merge' processor data for foam reader of parallel cases to disappear processor boundaries on transparent visualization

**URL:** https://discourse.paraview.org/t/merge-processor-data-for-foam-reader-of-parallel-cases-to-disappear-processor-boundaries-on-transparent-visualization/15959
**Category:** ParaView Support
**Created:** [January 9, 2025, 10:53am UTC](https://discourse.paraview.org/t/merge-processor-data-for-foam-reader-of-parallel-cases-to-disappear-processor-boundaries-on-transparent-visualization/15959 "2025-01-09T10:53:17Z")
**Posts on this page:** 1
**Showing post:** 5

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### Author: ![otaolafr](https://discourse.paraview.org/user_avatar/discourse.paraview.org/otaolafr/32/3595_2.png) [@otaolafr](https://discourse.paraview.org/u/otaolafr)
#### Post date: [January 15, 2025, 9:19am UTC](https://discourse.paraview.org/t/merge-processor-data-for-foam-reader-of-parallel-cases-to-disappear-processor-boundaries-on-transparent-visualization/15959/5 "2025-01-15T09:19:53Z")

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Hello mathieu,  
I am still having troubles with the visualization, saddly i can not share the data. now that being said, in my openfoam simulation I am using a baffle inside the mesh (this are internal faces that are repeated to give different boundary conditions from each side) it is used to simulate thin walls that are simulated as they have a thickness of 0. when i do the CleantoGrid filter (shouldnt it be CleanToGrid ? 😯 ) and I use the opacity different to 1 i get strange artifacts over this baffle zone as one can see in the following image:

> [@extract interface between water and air](https://discourse.paraview.org/t/extract-interface-between-water-and-air/15980):
>
> Hello, i am looking for some paraview recommendations on how to extract this data correctly, more for the seek of learn how than anything else. I have a cylindrical reactor (main axis is Z axis), where I have water and i bubble air from the bottom of the reactor. so air goes up throught the water and the level of the water will increase as the simulation runs. i would like to measure this level in function of time, for this what I thought as workflow were 2 differents: using slice slice …

I tested the different fitlers you mentioned (clean, cleantoGrid and also clean cells to grid non of them solved the visual issue, any clues?

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