https://www.youtube.com/watch?v=_qa5iWdfNKg
https://scrtwpns.com/mixbox/

Basically, someone has proposed in putting the Kubelka-Munk theory in digital art (my most basic understanding, is about the formula of how light is absorbed and scattered in a pigment before it reflects the color, unless I'm missing something in my explanation, which in my defense, my knowledge is limited to basic earth science and basic physics).

The art part in me, and for anyone who is a traditional artist who is also doing digital art, I'm genuinely impressed by this method where it could mix a yellow and a blue to make green instead of gray without any extra, and so far, only one program, Rebelle, has implemented this. ArtRage has this, but it mixes this neon green, this can be done with Sketchbook through the Marker brush, and Krita used to have this feature but dropped. I hope this would be given support by other art programs.