I saw here (https://code.blender.org/2021/04/cycles-x/) that the NLM Denoiser will be removed after the release of 2.93 cause “AI denoising algorithms and in particular OpenImageDenoise generally yield better results, and we will optimize the architecture and workflow for them.”
At this time, I got results that I can’t achieved with Optix or OpenImageDenoise (with Input passes : Color + Albedo + Normal) in particular when material has a bump to create grain.
Here are the same render, one with NLM, one with OID. Sure, it’s smoother with OID at some parts but too flat for the walls.
Are there some settings I missed so I can keep the grain on wall ?