Dealing with yellow color shift

[Christian-B (Christian Bouhon)]

Hello,
This is a very interesting post that sums up the problem of color perception.
This photo is out of gamut, here are a few screenshots.

1. gamut checking sRGB
   

   

2. gamut checking adobe RGB
   

   

3. gamut checking Rec2020
   

   

4. gamut checking Rec2020 + filmic
   

   

5. gamut checking sRGB + filmic
   the gamut control is not effective, I think it uses a colour space that is too wide for a jpg (ProPhoto RGB?)
   

   

6. gamut checking sRGB & Sigmoid preset smooth – Rec2020
   Idem vs filmic
   

   

7. gamut checking sRGB & Sigmoid preset smooth – sRGB
   slightly out of gamut in dark tones.
   

   

Which disappears by setting the “target black” to 0.0552%.

8. if we don’t want the colours rotation (Bezold-Brücke phenomenon), we can leave it at 0.
   
   

And here’s my proposal, 0 to 22 = my basic workflow ( preset which is automatically applied when a raw is loaded.

20250225_0032_03.CR3.xmp (15.4 KB)

Conclusion: I’m a fan of the Sigmoid module, its only fault is the loss of detail in high and low light, which I correct with a D&S preset to add texture, and a local contrast preset.

Greetings,
Christian