To have LightMix Denoiser option will be great, same way the denoiser cleans up the Beauty pass!
I posted an answer in duplicate question at Interactive LightMix + Denoise - Corona for 3ds Max :: Requests - Chaos Forum
Is this about C4D or Max? It is possible in Max: https://coronarenderer.freshdesk.com/support/solutions/articles/12000004976