Has anyone read about Full Spectrum? From my brief skim through the article, it appears to be “HueForge” for any print!
‘The lead developer, who goes by the pseudonym Ratdoux on GitHub, explains it better: “The useful concept here is often called Transmission Distance: if the printed layers are thin enough, or the filament is translucent enough, light can pass through multiple colored layers before reflecting back to the viewer.” It’s the same principle that allows vibrant, multicolor prints using tools like HueForge.” They continue “When that happens, the eye does not see only a red layer or only a blue layer, for example; it sees light that has interacted with both, and the result is perceived as a mixed color.”’
https://all3dp.com/4/new-orca-slicer-fork-unlocks-virtual-color-printing-for-any-3d-printer/