As does ArtRage? https://www.deviantart.com/artrageteam/art/Realistic-Color-Blending-in-ArtRage-419141057 https://www.deviantart.com/artrageteam/art/Realistic-C

As does ArtRage? https://www.deviantart.com/artrageteam/art/Realistic-Color-Blending-in-ArtRage-419141057 https://www.deviantart.com/artrageteam/art/Realistic-Color-B... MyPaint also has it though, and that's open source: https://mypaint.app/blog/2019/01/26/MyPaint-2.0-alpha/ https://mypaint.app/blog/2019/01/26/MyPaint-2.0-alpha/ (https://github.com/mypaint/libmypaint/pull/56 https://github.com/mypaint/libmypaint/pull/56 mentions using 7 primaries for blending), and another older thread about other methods: https://community.mypaint.app/t/real-color-blending-wip/390 https://community.mypaint.app/t/real-color-blending-wip/390 . MyPaint IIUC is integrated into Gimp, so I assume Gimp can also do it using the MyPaint brush engine. Edit: I was responding to TFA's claim "there was no practical way to implement true pigment mixing into digital painting. Until now." but this page isn't dated - seeing how many other discussions reference MixBox blending could this need a [20XX] tag? I don't think it's new.