I notice a funny thing - in RawTherapee, when I change, say, the green curve in the RGB curves, the green histogram changes. So far no surprise. What I don’t understand, and hopefully someone can explain to me, is why to the red and blue histograms also change when I’m only changing the green color curve?
Not as easy to see in Gimp, but it didn’t seem like Gimp behaves the same way, ie. if you change the green color curve in Gimp, only the green histogram changes.
(I tried it on a JPEG too, with no fancy raw processing or demosaicing applied, and changing one color curve still causes the other two histograms to change also)