There's a growing community around the OrcaSlicer - Full Spectrum fork that started all of this, which is attributed in the article. It's a cool technique and I expect all of the mainstream slicers will have it soon. You could already do this technique with OrcaSlicer with Prusa printers or cheaper options like the Snapmaker U1
The "Prusa ColorMix Cones" model is not what I'd recommend. I don't know why they made it like that for 3 and 4 colors other than to do something different than what the community was already doing. For 4 colors the PeggyPallette mini they used as inspiration is a much better model: https://makerworld.com/en/models/2519356-peggypalette-mini-3... You specifically want the dome shape to visualize how the layers blend at different angles. The fixed angle of the cones in the Prusa model misses the point and I don't know why they did that other than to be different.
The article goes on at length about their filament mixing model which sounds cool until you see the part that they only tested with Prusament PLA. Again, I think the open source community was already doing a good job with this.
There are several filament databases other than the one they're linking to that have TD values, which sprang out of the HueForge community. There are cheap tools from small makers to measure TD and color, too. One database: https://3dfilamentprofiles.com/
I'm glad they gave attribution to some of the sources of all of these ideas, but to be completely honest it's getting a little tiring to see everything the open source communities do get wrapped up, prefixed with a Prusa- brand prefix, and resold to us. Make sure you look beyond the Prusa official everything to get a sense of what the community is doing with all of this. I know I'm going to get downvoted for saying anything that isn't 100% pro-Prusa, but this is one topic where the open source community is quite a bit ahead and it's worth looking at what's out there.
This looks awesome! Exciting to see what happens in this space.
INDX anticipation intensifies!
This is exactly what I was hoping for to knock Bambu down a few notches.... Definitely makes Prusa an even better contender in the space.