Clarification on Image Denoise Node

[michaelskripin]

Hi there,

Which specific passes should be connected to the albedo and normal inputs of the Open Image Denoise node? I assume it’s the Diffuse Filter for albedo and Smooth Normal for normal, but I’d like to clarify this to be sure.

Thanks for your help!

[ricky_otoy]

Hi Michael,

You will need to set the Render AOV input nodes as:

Denoise Albedo (Beauty - surfaces | Denoise albedo)
Denoise Normal (Beauty - surfaces | Denoise normal)

[skientia]

OctaneRender® 2024.1 Alpha 1

New denoise AOV nodes - adapted to OctaneRender from the Open Image Denoise framework - are now supported on both GPU / CPU and can be used to denoise any render AOV and create powerful and granular denoising filters in any composition AOV output graph, including per light / per beauty pass denoising and OSL driven denoising effects. It also works with the PMC and info kernels and all AOV outputs.

There are two ways to use the new denoise nodes: The first via a new mode selection "Denoiser" in the denoiser settings of the Imager node. There you choose "Open Image Denoise" and of course enable it. All other denoiser options work the same as with the Octane AI Denoiser with the exception of the option "Denoise volumes" which is ignored when using Open Image Denoise.

We also added an input "Prefilter auxiliary images", which does a noise reduction pass over the auxiliary AOVs (see below) before they are used to denoise the main AOV. This can improve the end result if the auxiliary AOVs are very noisy themselves. Open Image Denoise AOV nodes uses two auxiliary AOVs, which are accessible via the render AOV settings:

• "Denoise albedo AOV" which records the albedo values for the first bounce of the camera path, but also of subsequent bounces if the first bounces are all specular.
• "Denoise normal AOV" which records the normal values for the first bounce of the camera path, but also of subsequent bounces if the first bounces are all specular.

When you use Open Image Denoise in the imager those 2 auxiliary AOVs are enabled, but you can also enable these without the denoiser being enabled, so they can be used later during post-production / compositing.