# inconsistent surfaceLIC behavior between serial and parallel

**URL:** https://discourse.paraview.org/t/inconsistent-surfacelic-behavior-between-serial-and-parallel/10007
**Category:** ParaView Support
**Created:** [July 14, 2022, 8:42pm UTC](https://discourse.paraview.org/t/inconsistent-surfacelic-behavior-between-serial-and-parallel/10007 "2022-07-14T20:42:21Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![aerogt3](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/a/3bc359/32.png) [@aerogt3](https://discourse.paraview.org/u/aerogt3)
#### Post date: [July 14, 2022, 8:42pm UTC](https://discourse.paraview.org/t/inconsistent-surfacelic-behavior-between-serial-and-parallel/10007/1 "2022-07-14T20:42:21Z")

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Hello,

I use the surfaceLIC plugin (often, it’s amazing!) and have noticed for many years that when run in parallel, there are graphical artifacts in the image that make it looks blotchy.

This goes away if run in serial, but then loading the data is very slow. I imagine there is some sort of issue in the parallel rendering. Is that a reasonable guess? Are there any settings (or build flags - I build from source) that would allow me to run paraview in parallel, but render LIC in serial to get rid of this issue?

 ![image](https://discourse.paraview.org/uploads/default/original/2X/f/ffb0d005d09b23b6cf394bc5ddd9ab4661293f60.jpeg)

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### Author: ![S.Zuniga](https://discourse.paraview.org/user_avatar/discourse.paraview.org/s.zuniga/32/9604_2.png) [@S.Zuniga](https://discourse.paraview.org/u/S.Zuniga)
#### Post date: [July 15, 2022, 7:01pm UTC](https://discourse.paraview.org/t/inconsistent-surfacelic-behavior-between-serial-and-parallel/10007/2 "2022-07-15T19:01:36Z")

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Do you have IceT disabled by any chance? I had a similar mosaic artifact when using EDL in parallel because of that.

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### Author: ![Francois\_Mazen](https://discourse.paraview.org/user_avatar/discourse.paraview.org/francois_mazen/32/6483_2.png) [@Francois\_Mazen](https://discourse.paraview.org/u/Francois_Mazen)
#### Post date: [July 18, 2022, 7:14am UTC](https://discourse.paraview.org/t/inconsistent-surfacelic-behavior-between-serial-and-parallel/10007/3 "2022-07-18T07:14:02Z")

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The SurfaceLIC issues in parallel may have several roots : bad data partitioning, inappropriate ghost cells, wrong screenshot size, etc.

Could you please share sample data and simple pipeline to reproduce the issue?