I noticed the ambient colors in 3.9 being overall much brighter. Before 3.9 it was like that 100% bright was 100% bright, 50% bright was 50% bright and 0% was 0% bright, now it feels more like the algorithm works different and 50% bright is more like 85% bright and 25% is like 70% bright etc.
What I want to say is that if you want to work with dark scenes like night, you only have like the lower 10% of the brightness scale to work with, since everything else is too bright and the scale is too small to being able to adjust it well through the slider.
Like if you want night brightness levels you now have to use values from 0.05 to 0.00 now.
For example in one scene before I had for night ambient the value 0.2 and now I have to go down to like 0.025 to 0.035 to have a similar result, you cannot even enter such small numbers in the editor, you can enter only two digits after the comma, you can only hope to hit it with the mouse slider. Overall it looks like you have to go down to almost 10 times lower to achieve a similar result now.
So it seems some algorithms have changed like the ambient scale as well as brightness and gamma, which now work differently, since you have brightness, contrast in addition to gamma and gamma only works in a small range now from 2 to 2.5 above and below it will not do anything.
So any ideas what has been going on to the algorithms and rendering? I don't necessarily want it changed, but at least the color picker menu needs some change either to be able to pick the colors better and more accurate or bringing the algorithm up so you can use the proper range.