I recently got a new iMac which has a wide gamut display (P3) and started to experiment with it. I noticed that some of my pictures changed appearance when color rendering was set to default “Generic/Camera default rendering”.
I narrowed it down to the “Protect saturated colors” slider: When set to the “Magic Wand” (for the example picture this is 40) it tends to limit the colors so that even sRGB is not fully used. This means when I export in sRGB or AdobeRGB the result is identical.
When I set the slider to 0 though the result looks much better in sRGB and even better in AdobeRGB. For the example below the difference in AdobeRGB is quite subtle. I had other pictures with much bigger differences in the reds and yellows.
The consequence for me is: I will set the “Protect saturated colors” slider to 0 in my presets. I haven’t seen a picture yet where it improves the result.
For the example picture I removed all other corrections and used only the color rendering at default with or without “Protect saturated colors”.
Unfortunately the upload destroys the color profile, so AdobeRGB pictures can’t be used.
#1 - With Protect Saturated Colors=40 (default magic wand), sRGB
#2 - With Protect Saturated Colors=0, sRGB