# Controlling 3d unwanted meshing

**URL:** https://discourse.paraview.org/t/controlling-3d-unwanted-meshing/12184
**Category:** ParaView Support
**Created:** [May 30, 2023, 7:49am UTC](https://discourse.paraview.org/t/controlling-3d-unwanted-meshing/12184 "2023-05-30T07:49:16Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![SKSoni](https://discourse.paraview.org/user_avatar/discourse.paraview.org/sksoni/32/11700_2.png) [@SKSoni](https://discourse.paraview.org/u/SKSoni)
#### Post date: [May 30, 2023, 7:49am UTC](https://discourse.paraview.org/t/controlling-3d-unwanted-meshing/12184/1 "2023-05-30T07:49:16Z")

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Hello everyone,  
I am using a CSV file to plot data. However, I am getting extra mesh outside the domain. Kindly comment to remove those meshes (outside T-shaped)

[data.csv](https://discourse.paraview.org/uploads/short-url/y6QR6TDNK6lS4CWy4lMkkbrArDi.csv) (74.1 KB)  
[mesh.pdf](https://discourse.paraview.org/uploads/short-url/5UWkDHueymAOXsZCMETFUAuHkdJ.pdf) (2.7 MB)

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### Author: ![SebastianSalazar42](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/s/46a35a/32.png) [@SebastianSalazar42](https://discourse.paraview.org/u/SebastianSalazar42)
#### Post date: [May 30, 2023, 3:09pm UTC](https://discourse.paraview.org/t/controlling-3d-unwanted-meshing/12184/2 "2023-05-30T15:09:30Z")

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Hi,

You can apply Delunay3D Filter to the data with options:  
alpha=0.070714, Tolerance=0, Offset=0, Bounding Transformation, Alpha Tets, Alpha Tris. You will achieve this:

 ![image](https://discourse.paraview.org/uploads/default/original/2X/c/c0c659bd63a12848778cde6337f189272f26bf72.png)

In playing with different numbers or filters you will be able to remove the small triangles (I think).

An option that PROBABLY would work easily is plot data in 2 parts (load 2 sets into the pipeline). In that way Paraview will not be confused in the limits (You can try)

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### Author: ![SKSoni](https://discourse.paraview.org/user_avatar/discourse.paraview.org/sksoni/32/11700_2.png) [@SKSoni](https://discourse.paraview.org/u/SKSoni)
#### Post date: [May 31, 2023, 5:51am UTC](https://discourse.paraview.org/t/controlling-3d-unwanted-meshing/12184/3 "2023-05-31T05:51:33Z")

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Thanks @Sebastian for your kind support. It helps me to get according to my 3d domain.

Also. is there any method to generate the python script for the same action.

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### Author: ![SebastianSalazar42](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/s/46a35a/32.png) [@SebastianSalazar42](https://discourse.paraview.org/u/SebastianSalazar42)
#### Post date: [June 6, 2023, 3:54am UTC](https://discourse.paraview.org/t/controlling-3d-unwanted-meshing/12184/4 "2023-06-06T03:54:11Z")

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Yes, because you can “record” your actions in Paraview (like recording a macro in excel) to Python. Or generate your own scripts in the window.

Check **Cyprien Rusu** channel in Youtube, video " Paraview Tutorial 11 Automating Paraview Tasks with Python Script"