Use the powerful NVIDIA OptiX AI Denoiser directly from Blender with this addon.
Switch branches/tags
Nothing to show
Clone or download
Type Name Latest commit message Commit time
Failed to load latest commit information.
icons First commit Aug 28, 2018
DENOISER SOURCE.txt First commit Aug 28, 2018
LICENSE Added GNU General Public License. Aug 28, 2018 First commit Aug 28, 2018 Added the readme file Aug 28, 2018

This addon brings the power of NVIDIA OptiX Denoiser directly into Blender 3D. It has 4 simple features:

  • Denoise render result
  • Render and denoise result
  • Denoise rendered animation
  • Render animation and denoise

It is built on top of a command line executable coded by Declan Russel ( The addon automates the usage of this executable to use it directly from Blender.

The two features of the addon that include rendering the image(s) before denoising disable any preview during the rendering process, and the UI will be frozen. This is why I recommend to render manually the image(s) and then click either "Denoise render result" for a single image, or "Denoise rendered animation".

When you denoise a single image, either from option 1 or 2, the normal noisy rendered image is keeped into the "Render result", and a temporary file is created and opened to let you view the denoised result. It is then easy to compare the noisy and the denoised images! This file is overwritten every time you denoise an image, no matter in which project. That is to say, if it is your final render, save it somewhere else.
When you denoise an animation, you must go in the folder where the frames are saved and view them here.

When using the addon for an animation, it is required that you specify where the image will be saved on your disk, for the denoiser requires to know where the images will be stored in order to read them. The folder where you save the animation must be different of the default "/tmp\", to avoid any conflict with existing images.
What's more, you must render your animation as an image sequence, not a video file, or the denoising won't work.

This addon provides an access to the OptiX AI Denoiser, and thus has the same advantages, but also the same weaknesses. For instance, it runs exclusively on NVIDIA GPUs. Note that due to the use of an external executable, it runs only on Windows. Also, denoising a very low sample image will result in strange results.


Tested on Windows 8.1 64 bits, with Blender 2.79.

Developpers, if you want to modify this addon, I recommend you to download the release directly, for the script will be the same as on this repository, and it will directly include the executable, which is not on the repository. The denoiser executable and all its dependencies must be in the "Denosier_v2.1" folder, which is placed in the same folder as the script, like this:

  • Denosier_v2.1/
    • ...
  • icons/
    • optix_logo.png