PrusaSlicer 2.9.6 adds ColorMix for flexible multicolor printing
ColorMix landed in PrusaSlicer 2.9.6 with cleaner preview handling and new flush and exclude tags for multicolor jobs.
Prusa shipped PrusaSlicer 2.9.6 on June 29 as the final build of the branch, putting ColorMix front and center as a new option for multi-material and multicolor printing. The feature is Prusa’s take on FullSpectrum, the community method that builds new colors by alternating materials between layers, and Prusa traces its origins to community work in ratdoux’s OrcaSlicer-FullSpectrum fork.
Toolpath moves between FLUSH_START and FLUSH_END now stay out of the G-code preview, which cuts down on clutter when checking purge behavior, and Prusa fixed a fan-speed bug that restored the wrong filament setting when a toolchange command had leading whitespace. In the 2.9.6-rc1 notes, Prusa added support for custom G-code tags ;EXCLUDE_E_START and ;EXCLUDE_E_END to keep filament consumption sections out of the totals, plus ;FLUSH_START and ;FLUSH_END for nozzle-cleaning sections. Flush and wipe-tower use is now tracked per extruder in the right sidebar.
The beta build saved profiles into a PrusaSlicer-beta directory so it could run alongside the release version, while Linux builds went out through Flatpak on flathub-beta and trailed the GitHub release by a couple of hours. Prusa also fixed early line wrapping and rendering artifacts in the ColorMix dialog, corrected missing total toolchanges in binary G-code metadata, and made custom G-code tags ignore whitespace before the semicolon. In a May 26 blog post, Prusa calibrated the ColorMix model against measured FDM prints, tied it to the OpenPrintTag Material Database, brought the workflow into both PrusaSlicer and EasyPrint, and prepared a dedicated Prusament CMYKW set.
INDX printer profiles are not bundled with PrusaSlicer 2.9.6 and will arrive through an online configuration update, while Prusa’s downloads page lists CORE One/+ INDX firmware 6.6.0 from June 25 with full toolchanger support for up to eight tools, contactless nozzle induction heating, contactless tool-offset sensing, guided calibrations, and low-waste nozzle cleaning.
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