# OSPRay rendering slow
**URL:** https://discourse.paraview.org/t/ospray-rendering-slow/14941
**Category:** ParaView Support
**Created:** [June 27, 2024, 6:00pm UTC](https://discourse.paraview.org/t/ospray-rendering-slow/14941 "2024-06-27T18:00:20Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@shawn](https://discourse.paraview.org/u/shawn)
#### Post date: [June 27, 2024, 6:00pm UTC](https://discourse.paraview.org/t/ospray-rendering-slow/14941/1 "2024-06-27T18:00:20Z")
Hey all,
I am trying to do some rendering with OSPRay Raycaster on ParaView 5.12.1. As of right now, whenever using raytracing trying to do any movement of the object is incredibly slow and borderline unusable. I am trying to figure out if there is any setting or option to make it render better.
The computer I am using has an i9-12900k and 64gb of RAM, the only issue is the GPU as it is a little bit of an older card but when trying with a different computer with a 4070 I am experiencing the same issue.
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [June 28, 2024, 8:44am UTC](https://discourse.paraview.org/t/ospray-rendering-slow/14941/2 "2024-06-28T08:44:56Z")
Hi @shawn
The trick is to set number of sample to 4 and enable denoising.
Best,
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### Author:  [@shawn](https://discourse.paraview.org/u/shawn)
#### Post date: [June 28, 2024, 1:26pm UTC](https://discourse.paraview.org/t/ospray-rendering-slow/14941/3 "2024-06-28T13:26:38Z")
Thank you for your help, the model looks a lot better however it is incredibly slow. When trying to move (rotate) the model, it is choppy and slow. Any advice on this would be helpful.
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [June 28, 2024, 1:27pm UTC](https://discourse.paraview.org/t/ospray-rendering-slow/14941/4 "2024-06-28T13:27:42Z")
I mean, this is raytracing on CPU, so 1 or 2 FPS is expected.
Raytracing on GPU is possible using VisRTX and soon possible using OSPRay 3.0
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### Author:  [@shawn](https://discourse.paraview.org/u/shawn)
#### Post date: [June 28, 2024, 1:30pm UTC](https://discourse.paraview.org/t/ospray-rendering-slow/14941/5 "2024-06-28T13:30:29Z")
I just wanted to make sure it wasn’t something wrong that I was doing. Thank you so much for all the help.