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Roll over image to view imager_denoiser_oidn enabled


The Oidn denoiser (based on Intel's Open Image Denoise technology) is available as a post-processing effect. It is integrated into Arnold for use with IPR as an imager (so that you get a very quickly denoised image as you're moving the camera and making other adjustments). 

There are some requirements to be aware of when using the Oidn denoiser, however:

  1. The Oidn denoiser does not work with Merged AOVs (unlike the Arnold Denoiser).
  2. If you want to use the Oidn denoiser on multiple AOVs you must apply it to each AOV.
  3. If you wish to have the same AOV saved to EXR in both original and denoised mode, to avoid name duplication you can add the suffix "_denoise" to the AOV name and the Oidn denoiser will detect the original AOV.

  • Arnold will automatically force a box_filter on outputs with filters with known issues when either of the denoisers are used. This is because the Oidn denoiser does not perform well with filters that span across multiple pixels.
  • Denoisers won't work as well after imagers have been applied to them. Therefore denoisers should be applied before any other post-processing imagers (top of imagers list).
  • The Oidn denoiser only works on full frames rather than buckets.


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