mixbox

The implementation looks fairly small unless I am missing something https://github.com/scrtwpns/mixbox/blob/master/cpp/mixbox.cp... Like, it looks like just decompress that lut and have it decompressed in the project and the rest is just interpolation algorithms.

I added a comment to the issue here: https://github.com/scrtwpns/mixbox/issues/15

Personally, I don't care about the library, and just want the pure math implementation for shaders and such. For that, they have the algorithm available here in GLSL, vec3 mixbox_lerp is the function you want: https://github.com/scrtwpns/mixbox/blob/master/shaders/mixbo... I don't have time to whip up a demo, but it seems like it's pretty well optimized and it looks really nice in the examples. Great work from these folks.

Have you checked out mixbox[0]? The outputs do feel intuitively "right" as someone who has dabbled in watercolor, and the paper/videos cover the thinking and Kubelka-Munk theory well. [0] https://github.com/scrtwpns/mixbox

> app I failed to quickly find the painting app I'm trying to remember. Though there's FocalPaint[1] (12 channel multispectral). Maybe it's Rebelle[2]? It looks like there's unfinished work[5] for Krita? Mixbox[6] is related, but avoids actual spectra. > mixing guide Neat. ColorMixingTools[3] is similar, with a drop2color and color2drop, and online[4] and derived apps. [1] https://www.focalpaint.com/p/focalpaint.html [2] https://www.escapemotions.com/products/rebelle/about [3] https://zsolt-kovacs.unibs.it/colormixingtools https://zsolt-kovacs.unibs.it/colormixingtools/cmt-drop2colo... https://zsolt-kovacs.unibs.it/colormixingtools/cmt-color2dro... [4] https://sensuallogic.com/paintmaker [5] https://invent.kde.org/graphics/krita/-/merge_requests/1783 https://krita-artists.org/t/paint-like-color-mixing-kubelka-... [6] https://github.com/sc

This is from 2015. Hardly news. Also, there's already a program that simulates realistic color mixing: https://github.com/scrtwpns/mixbox So far the only painting software I know that incorporate it is Rebelle 5.

This all seems like sound(er) advice. On color : I recently realised (or read somewhere) about the simplest color wheel- if you divide a circle into 6 segments and paint the primaries : {R, Y, B} in non-neighbouring segments, then the ones in between are the secondaries: {R+Y=O, R+B=P, Y+B=G}. Then if you combine primaries and the 'opposite' secondary, you get brown/grey like colors. Also, I get quite good combinations (palettes) by using a mixture of the same colors, like a red and a green and then a mix of the two to make a grey. I've thinking about using https://github.com/scrtwpns/pigment-mixing to go from a desired RGB output to the {RGB1, RGB2, percentage) inputs somehow. Would have to be quite rough estimate though, as mixing real paints in exact proportions seems hard.

The best color mixing I've seen in a while is this https://github.com/scrtwpns/pigment-mixing