# Create a Solid surface from points using the Delaunay 3D filter

**URL:** https://discourse.paraview.org/t/create-a-solid-surface-from-points-using-the-delaunay-3d-filter/11912
**Category:** ParaView Support
**Tags:** vtk
**Created:** [April 18, 2023, 9:06am UTC](https://discourse.paraview.org/t/create-a-solid-surface-from-points-using-the-delaunay-3d-filter/11912 "2023-04-18T09:06:43Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![Renard](https://discourse.paraview.org/user_avatar/discourse.paraview.org/renard/32/5701_2.png) [@Renard](https://discourse.paraview.org/u/Renard)
#### Post date: [April 18, 2023, 9:06am UTC](https://discourse.paraview.org/t/create-a-solid-surface-from-points-using-the-delaunay-3d-filter/11912/1 "2023-04-18T09:06:43Z")

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![pview_del3d](https://discourse.paraview.org/uploads/default/original/2X/5/59d8457c0b1dfe01114d73dae6828997eda3751b.png)  
Hi,  
I have a set of discrete visualization points as seen in the image which is in the shape of the letter H (left side of the image). I’m trying to make a solid surface for better visualization using these points using the Delaunay 3D filter of Paraview. However, when I do this I’m getting a rectangular shape as seen in the right side image. How can I fix this? Thanks for the help.

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### Author: ![mwestphal](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mwestphal/32/17_2.png) [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [May 2, 2023, 11:41am UTC](https://discourse.paraview.org/t/create-a-solid-surface-from-points-using-the-delaunay-3d-filter/11912/2 "2023-05-02T11:41:52Z")

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@Charles_Gueunet

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### Author: ![Charles\_Gueunet](https://discourse.paraview.org/user_avatar/discourse.paraview.org/charles_gueunet/32/40_2.png) [@Charles\_Gueunet](https://discourse.paraview.org/u/Charles_Gueunet)
#### Post date: [May 3, 2023, 7:13am UTC](https://discourse.paraview.org/t/create-a-solid-surface-from-points-using-the-delaunay-3d-filter/11912/3 "2023-05-03T07:13:03Z")

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@Renard You may want to play around with the `Alpha` parameter, which approximately correspond to the maximum edge size you want in the result:

 ![image](https://discourse.paraview.org/uploads/default/original/2X/6/6a6f1cd631da7a66a032a41efa770b2977b72b53.jpeg)

Smaller edges are required to enter into concave area.

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### Author: ![Renard](https://discourse.paraview.org/user_avatar/discourse.paraview.org/renard/32/5701_2.png) [@Renard](https://discourse.paraview.org/u/Renard)
#### Post date: [September 5, 2023, 8:46am UTC](https://discourse.paraview.org/t/create-a-solid-surface-from-points-using-the-delaunay-3d-filter/11912/4 "2023-09-05T08:46:17Z")

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Thank you for the response