On this page |
Overview
NVIDIA’s OptiX AI-Accelerated Denoiser uses deep learning to remove noise and "fireflies" from a rendered image. It is useful for getting a higher-quality preview of what a converged image will look like so you can make lighting decisions faster.


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The NVIDIA OptiX denoiser requires an NVIDIA GPU with Kepler architecture or better.
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The denoiser is not available on macOS.
How to
To... | Do this |
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Download the plugin |
Before using the denoiser you must download the plugin:
For studio-wide installation, see manual installation below. |
Use the denoiser in the Render View |
Turn on the In the Render View, the denoiser always uses the "basecolor" image plane (if it exists) as the albedo input. |
Use the denoiser in Mantra |
In the parameter editor for the In the Pixel filter field you can optionally specify an image plane to use as the albedo input to the denoiser with the denoise optix -a mydiffuse |
Choose which GPU to use |
If you have more than one GPU in your computer, you can specify which one to use for denoising.
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Manual installation
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Use the following links to download the archive for the users' platform:
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Extract the contents of the archive into a directory accessible by the intended users.
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For each user, edit their
$HOUDINI_USER_PREF_DIR/houdini.env
file to add aHOUDINI_NVIDIA_OPTIX_DSO_PATH
variable pointing to the directory.