I recently observed that denoising seems to work very aggressively on raws from my Nikon Z6II. I never observed this phenomenon before. At nearly the lowest strength settings you can observe how strong profiles denoise changes the photo
in the 1:1 screenshots (you will probably need to download the photos and take a look at 100% on the screenshots, sorry):
This one has profiled denoising activated but with a very very low strength. But if you look at the flat looking trees you will quickly see the difference denoising makes. The photo actually does not have much noise since its shot with ISO 100, but still the effect is very suprisingly strong to me.
Looks like your camera does not have noise profiles associated with it so that probably affects the usefulness of the profiled denoise module. Also, wavelets mode is recommended over non-local means so you could try that.
@elstoc is right. There is no profile found for your camera, so darktable does not adapt to the iso value, and it may be needed to lower really a lot the strength
Thanks for the answers. I tried wavelet in U0V0. Lowering the denoise strength from the default “1” then did what I actually wanted: smoothing the colours a bit.
Take the raw files for NR as Mica wrote and upload them to a filehost. I can create a noise profile for them you after that can upload as an issue at Github.
