To denoise final renders, Clarisse provides a special image operator called Optix Denoiser which runs exclusively on NVIDIA GPUs. If you plan to render your images over a render-farm without NVIDIA GPUs, the image filter is going to fail. We recommend you instead to disable this filter and use CDenoise command line tool on the rendered EXR image sequence.
It is highly recommended to set the Anti Aliasing Filter Mode attribute of the raytracer to Importance Filter otherwise, neighbor pixels noise interferes with the quality of the denoiser.
The filter can be added as an Image Filter or as an Image Node.
To add the image filter just select the layer scene you wish to denoise and using the Attribute Editor under Filters attribute, choose Add > Optix Denoiser.
The denoiser comes with several options to control the behavior and quality of the denoiser:
|Strength||Control the strength of the denoiser output. It basically performs an over operation from the denoised output over the input image. When set to 100% you get the full output from the denoise image. When set to 0% you get the original input image.|
|Use Albedo||Use the
|Use Normal||Use the
|Albedo AOV||Choose the name of the image buffer you wish to use as
|Normal AOV||Choose the name of the image buffer you wish to used as
By default, the
albedo and the
camera_normal AOVs are not automatically added to the image. You must output
camera_normal from your renders using the AOV Editor. These extra AOVs generally help the denoiser to improve the quality of the denoised output.
However, in some cases, these AOVs can degrade the quality of the denoised output so uncheck them to see if the result is improved. We recommend to first uncheck
Use Normals and then