# Post processing shader

**URL:** https://discourse.paraview.org/t/post-processing-shader/16105
**Category:** Development
**Tags:** opengl
**Created:** [February 4, 2025, 12:21pm UTC](https://discourse.paraview.org/t/post-processing-shader/16105 "2025-02-04T12:21:59Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Djolalo](https://discourse.paraview.org/user_avatar/discourse.paraview.org/djolalo/32/15873_2.png) [@Djolalo](https://discourse.paraview.org/u/Djolalo)
#### Post date: [February 4, 2025, 12:22pm UTC](https://discourse.paraview.org/t/post-processing-shader/16105/1 "2025-02-04T12:22:00Z")

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Hi folks !  
I’ve wanted to implement bloom using a postprocessing shader (probably GPU Downsampling). I would’ve used openGL shading syntax since I know it’s the shading language used in Paraview, but I can’t find any good shader example.  
Could anyone provide me with a good example ? I’ve seen posts of people implementing shaders, but most of the links were unclear or lead to a dead end.  
Have a good day ! 🙂