# How to enable optix in visualizer?
**URL:** https://discourse.paraview.org/t/how-to-enable-optix-in-visualizer/13069
**Category:** Web Support
**Created:** [October 20, 2023, 7:48am UTC](https://discourse.paraview.org/t/how-to-enable-optix-in-visualizer/13069 "2023-10-20T07:48:33Z")
**Posts on this page:** 10
**Page:** 1
### Author:  [@fashing](https://discourse.paraview.org/u/fashing)
#### Post date: [October 20, 2023, 7:48am UTC](https://discourse.paraview.org/t/how-to-enable-optix-in-visualizer/13069/1 "2023-10-20T07:48:33Z")
Hi Paraview,
I saw this [slide](https://developer.download.nvidia.com/video/gputechconf/gtc/2019/presentation/s9697-path-tracing-in-paraview-optix-rtx-for-scientific-visualization.pdf) from nvidia, and one page of it shows the option to enable optix on visualizer.
However I cannot find it at anywhere, I lunch the visualizer as following:
```auto
# ./bin/pvpython ./share/paraview-5.11/web/visualizer/server/pvw-visualizer.py --content ./share/paraview-5.11/web/visualizer/www
VisRTX 0.1.6, using devices:
0: Tesla V100-PCIE-32GB (Total: 34.1 GB, Available: 33.8 GB)
```
Is this option released already or do I miss something? Thank you!
---
### Author:  [@jourdain](https://discourse.paraview.org/u/jourdain)
#### Post date: [October 20, 2023, 4:28pm UTC](https://discourse.paraview.org/t/how-to-enable-optix-in-visualizer/13069/2 "2023-10-20T16:28:52Z")
It was a custom build of visualizer but if your ParaView has optix available, it should be available within the UI of Visualizer like we have in ParaView.
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### Author:  [@fashing](https://discourse.paraview.org/u/fashing)
#### Post date: [October 23, 2023, 2:17am UTC](https://discourse.paraview.org/t/how-to-enable-optix-in-visualizer/13069/3 "2023-10-23T02:17:42Z")
I can choose the OptiX backend under `Ray Traced Rendering` in ParaView on my laptop. However, there’s no such option in Visualizer under `Ray Traced Rendering` with `Enable Ray Tracing` is on.
I am just wondering if this `Enable OptiX` only exists in that particular custom build.
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### Author:  [@jourdain](https://discourse.paraview.org/u/jourdain)
#### Post date: [October 23, 2023, 1:48pm UTC](https://discourse.paraview.org/t/how-to-enable-optix-in-visualizer/13069/4 "2023-10-23T13:48:46Z")
If you are using the same paraview for visualizer if should be there. But you might need to have that plugin as auto-load.
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### Author:  [@Wei](https://discourse.paraview.org/u/Wei)
#### Post date: [October 24, 2023, 5:26am UTC](https://discourse.paraview.org/t/how-to-enable-optix-in-visualizer/13069/5 "2023-10-24T05:26:22Z")
I also try Paraview web recently, got similar question here.
When selecting `Enable Ray Tracing`, even there isn’t a dropdown list to select backend method like desktop version.
Visualizer of both windows and linux version have same situation.
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### Author:  [@jourdain](https://discourse.paraview.org/u/jourdain)
#### Post date: [October 24, 2023, 2:26pm UTC](https://discourse.paraview.org/t/how-to-enable-optix-in-visualizer/13069/6 "2023-10-24T14:26:23Z")
It looks like that specific UI element for handling ray tracing configuration is not understood by Visualizer.
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### Author:  [@jourdain](https://discourse.paraview.org/u/jourdain)
#### Post date: [October 24, 2023, 2:27pm UTC](https://discourse.paraview.org/t/how-to-enable-optix-in-visualizer/13069/7 "2023-10-24T14:27:23Z")
But that does not mean, you can not properly set it up on the server side via your own code path.
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### Author:  [@Wei](https://discourse.paraview.org/u/Wei)
#### Post date: [October 25, 2023, 2:39am UTC](https://discourse.paraview.org/t/how-to-enable-optix-in-visualizer/13069/8 "2023-10-25T02:39:01Z")
Understood, thanks for the confirmation!
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### Author:  [@steve\_r](https://discourse.paraview.org/u/steve_r)
#### Post date: [November 3, 2023, 1:01pm UTC](https://discourse.paraview.org/t/how-to-enable-optix-in-visualizer/13069/9 "2023-11-03T13:01:50Z")
I’m also interested, how can I enable the “ray tracing” backend selection in ParaViewWeb?
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### Author:  [@jourdain](https://discourse.paraview.org/u/jourdain)
#### Post date: [November 3, 2023, 2:53pm UTC](https://discourse.paraview.org/t/how-to-enable-optix-in-visualizer/13069/10 "2023-11-03T14:53:38Z")
The missing part is just the GUI, which means you can either create your own UI or do those changes on the Python in a static fashion.