Hello
@nosle @jonathanBieler @Lawrence37 @Wayne_Sutton
I did a lot of research into why, in certain cases, the system created artifacts in the highlights and elsewhere with a remedy in “Settings” - Avoid color shift = “Munsell” instead of “XYZ absolute” and vice versa.
After checking the algos of Munsell, Gamut Lab, Gamut XYZ… nothing all is fine.
I looked at the code (it’s at least 5 years old, or more…) and in one or two places I “Clip” the Highlights and “a” and “b” (chroma)… That’s what was causing the mess.
So I kept the code, but “Clip L”, no longer does anything, and Clip C (for “a” and “b”) instead of cutting -40000 and +40000 (the normal absolute limit is 32768), now cuts to -100000 and +100000 (huge values… to avoid too much imaginary colors).
So I removed “XYZ absolute” from Default Settings and (re)set “Munsell only”… and everything is fine.
On the other hand, for Settings to take effect, you must “Reset” to Neutral… and of course not reload an “old” pp3…
To check, if everything works, especially with Cam16.
Executables (lacam16n)
https://github.com/Beep6581/RawTherapee/releases/tag/pre-dev-github-actions
Thank you
Jacques