# The surface undulations of the 3D model created by Delaunay3D are not visible.

**URL:** https://discourse.paraview.org/t/the-surface-undulations-of-the-3d-model-created-by-delaunay3d-are-not-visible/14603
**Category:** ParaView Support
**Created:** [May 12, 2024, 8:30am UTC](https://discourse.paraview.org/t/the-surface-undulations-of-the-3d-model-created-by-delaunay3d-are-not-visible/14603 "2024-05-12T08:30:12Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![efxdc](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/e/ac8455/32.png) [@efxdc](https://discourse.paraview.org/u/efxdc)
#### Post date: [May 12, 2024, 8:30am UTC](https://discourse.paraview.org/t/the-surface-undulations-of-the-3d-model-created-by-delaunay3d-are-not-visible/14603/1 "2024-05-12T08:30:12Z")

</div>

I have encountered some issues while using ParaView to import CSV files and create 3D visualizations.  
My processing flow is as follows:  
\*open \> csv \> apply  
\*Add Filter \> Table To Points \> apply  
\*Add Filter \> Delaunay 3D \> apply  
The surface undulations of the 3D model created by Delaunay3D are not visible.

 ![三维](https://discourse.paraview.org/uploads/default/original/2X/5/54ccef0436854cc141754ac70c219f4f3be9c942.jpeg)  
However, when I create a Delaunay2D image, the undulations are quite obvious. Here is the processing flow:  
\*open \> csv \> apply  
\*Add Filter \> Table To Points \> apply  
\*Add Filter \> Delaunay 2D \> apply  
 ![2维](https://discourse.paraview.org/uploads/default/original/2X/6/60bde3f3a3d2336db44b28b5487a853c96d10cc4.jpeg)  
Please, what are some possible solutions to this?