# MultiVolume Rendering Optix pathtracer

**URL:** https://discourse.paraview.org/t/multivolume-rendering-optix-pathtracer/16498
**Category:** Development
**Created:** [April 17, 2025, 10:11pm UTC](https://discourse.paraview.org/t/multivolume-rendering-optix-pathtracer/16498 "2025-04-17T22:11:15Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![alruwa16](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/a/f6c823/32.png) [@alruwa16](https://discourse.paraview.org/u/alruwa16)
#### Post date: [April 17, 2025, 10:11pm UTC](https://discourse.paraview.org/t/multivolume-rendering-optix-pathtracer/16498/1 "2025-04-17T22:11:15Z")

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Hi everyone,  
I am trying to render multivolumes inside paraviews. Both volumes are rendered using volume rendering mode GPU based. When I enable both volumes to view, one volume does not rendering correctly on top of the other one.

when I enable raytracing. The volume are render correctly, however, the colors of the 3d volumes changes and I can not render using Optix pathtracer. Paraview is very slows and does only CPU rendering. I have RTX 6000 GPU, however, I am not able to render using the Optix pathtracer in the GPU.