# Contours showing mesh effect in Paraview
**URL:** https://discourse.paraview.org/t/contours-showing-mesh-effect-in-paraview/16645
**Category:** ParaView Support
**Created:** [May 17, 2025, 7:56pm UTC](https://discourse.paraview.org/t/contours-showing-mesh-effect-in-paraview/16645 "2025-05-17T19:56:11Z")
**Posts on this page:** 9
**Page:** 1
### Author:  [@scabo](https://discourse.paraview.org/u/scabo)
#### Post date: [May 17, 2025, 7:56pm UTC](https://discourse.paraview.org/t/contours-showing-mesh-effect-in-paraview/16645/1 "2025-05-17T19:56:11Z")
Hi
I have exported data from Fluent in gold ensight format and displaying in Paraview. However, the contour plot is showing the effect of mesh lines as you can see the O-grid mesh lines with a rectangular box is shown at the middle. i have tried by extractcells by type to hexahedron but it does not work. Can someone let me know how to plot the contour on a uniform mesh without the mesh lines? I have attached the picture.
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [May 20, 2025, 9:51am UTC](https://discourse.paraview.org/t/contours-showing-mesh-effect-in-paraview/16645/2 "2025-05-20T09:51:46Z")
please share your data.
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### Author:  [@scabo](https://discourse.paraview.org/u/scabo)
#### Post date: [May 20, 2025, 10:34am UTC](https://discourse.paraview.org/t/contours-showing-mesh-effect-in-paraview/16645/3 "2025-05-20T10:34:15Z")
Hi,I am sharing the state. It contains second derivatives and contours of it on the cross-section. The contours are coming along the O-grid mesh lines. Is there any way to remove this? thanks
[sumofvort\_state.pvsm](https://discourse.paraview.org/uploads/short-url/kDbr3Rza6JhazpCnXdyzeVW8Iah.pvsm) (1.3 MB)
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### Author:  [@scabo](https://discourse.paraview.org/u/scabo)
#### Post date: [May 20, 2025, 10:36am UTC](https://discourse.paraview.org/t/contours-showing-mesh-effect-in-paraview/16645/4 "2025-05-20T10:36:58Z")
Here turn on the calculator 2 and adjust the values from -0.1 to 0.1. You can see the mesh artefacts more clearly
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [May 20, 2025, 10:51am UTC](https://discourse.paraview.org/t/contours-showing-mesh-effect-in-paraview/16645/5 "2025-05-20T10:51:34Z")
Please share also your data, just the state file is not enough I’m afraid.
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### Author:  [@scabo](https://discourse.paraview.org/u/scabo)
#### Post date: [May 20, 2025, 10:59am UTC](https://discourse.paraview.org/t/contours-showing-mesh-effect-in-paraview/16645/6 "2025-05-20T10:59:51Z")
Hi,
I just shared via We Transfer a zip file. There i have used the Gradient filter twice to obtain the second derivative and plotted a property as a sum of second derivatives on the cross-section. If u need anything else please let me know
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### Author:  [@scabo](https://discourse.paraview.org/u/scabo)
#### Post date: [May 20, 2025, 12:31pm UTC](https://discourse.paraview.org/t/contours-showing-mesh-effect-in-paraview/16645/7 "2025-05-20T12:31:36Z")
Hey did you have a chance to look at the data? thanks
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [May 20, 2025, 3:55pm UTC](https://discourse.paraview.org/t/contours-showing-mesh-effect-in-paraview/16645/8 "2025-05-20T15:55:04Z")
I have a crash when I process your data with the gradient filter, does it work as expected on your side ?
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### Author:  [@scabo](https://discourse.paraview.org/u/scabo)
#### Post date: [May 20, 2025, 4:22pm UTC](https://discourse.paraview.org/t/contours-showing-mesh-effect-in-paraview/16645/9 "2025-05-20T16:22:04Z")
Yes it works fine for me. If you see my state file i shared-i use the gradient filter on those variables. But i am getting some mesh artefacts which i wanted to remove. Idk whether it is possible or not. Also i tried to plot on uniform grid using Resample to Image but it does not work as expected..