Creality has published Creality Print v7.3.0, and the release notes leave little doubt about where the company's slicer team spent its time. The headline features are about color: a new prediction algorithm built on measured filament spectral data, one-click color separation for OBJ models with embedded colors, gradients driven by print height or region, and a reworked Purge to Object Skeleton mode that buries purge material inside the part as infill instead of dumping it into a waste pile. Around that core sit support for multi-nozzle, multi-diameter printing on the K3, a new Adaptive TPMS infill, ZAA anti-aliasing for top surfaces, and what Creality says is roughly 50% faster opening of large full-plate 3MF projects.
The current build is V7.3.0.6157, dated Oct 09, 2026 on Creality's download center, alongside earlier builds 6151 and 6149. The download page offers it for Windows and Mac only. Both sources for this story are published by Creality itself, and we have not found independent testing of the new features yet, so the performance figures below are the company's own.
Color Prediction Gets a Physics Upgrade
Mixing a target color out of a handful of filaments is fundamentally a prediction problem. The slicer has to work out which combination of filaments will land closest to the color in the source model, and if the prediction is off, the printed part drifts from what was on screen.
Creality's answer in 7.3.0 is to stop guessing from nominal filament colors and instead predict from measured spectral data for each filament. The company says that in 36 sets of CMYK color-mixing tests, the new algorithm achieved an average deltaE00 of 2.85, versus 8.63 with what it calls the traditional algorithm. DeltaE00 is a standard metric for perceived color difference, and lower is better, so on Creality's numbers the average error falls to roughly a third of its previous value. The release notes say the algorithm has been validated with filaments such as Hyper PLA.
That last detail matters. A spectral approach is only as good as the spectral data behind it, and the notes name only a limited set of validated filaments. Makers running other spools should treat the 2.85 figure as a best case under the vendor's conditions rather than a guarantee for whatever is on the shelf.
Separation, Gradients and Anchors
The color tools come in two flavors. In the first color-separation mode, the slicer works from your existing filament list, mapping model colors onto whatever spools you have defined. In the second, it uses a standard CMYW or RYBW filament set for separation and matching.
For models that already carry color, Creality has added one-click color separation for OBJ files with embedded colors. The slicer converts the embedded colors into editable painting data and matches them to available filaments.
Gradient printing is the other new creative option. Users can apply a color gradient either by print height or by region, adding color anchors within a selected height range to define the transition. The notes suggest skies, flames and decorative objects as suitable subjects.
Turning Purge Into Structure
Every multi-color printer that shares a single hotend between materials pays a tax in purge: the filament flushed out during each color change so the next color comes out clean. Purge to Object Skeleton attacks the problem by routing purge into hidden internal infill areas, where the color contamination does not matter because no one will ever see it. It does not eliminate the wipe tower: Creality keeps external purging for the first layer and areas without enough internal capacity.
Version 7.3.0 optimizes that mode, and the notes include a worked example. With the new algorithm enabled, Creality's sample job is a 513.10 g model with 28.81 g of purge and a 21.93 g wipe tower, for 563.85 g total and 15h 56m. The same job under all default settings is a 403.40 g model with 199.02 g of purge and an 18.58 g wipe tower, for 620.99 g total and 16h 32m. By our arithmetic that is 57.14 g less filament in total, about 9%, and 36 minutes less print time. The comparison is against default settings, not the previous algorithm, and it is one vendor-chosen model.
Wipe towers get attention too. The download-page update notes add a Corner Rib option for wipe towers, and they say color and settings are now preserved after cutting a model.
K3 Multi-Nozzle Support
The release adds multi-nozzle, multi-diameter printing for the K3. According to the release notes, supported presets span 0.2, 0.4, 0.6 and 0.8 mm nozzles, with different sizes configurable per extruder in the same job. Creality labels the feature experimental and says the 0.2, 0.6 and 0.8 mm parameters are not yet fully validated. The notes also say the configuration format changed, so versions earlier than 7.3 no longer support K3 printing.
Alongside that, the slicer gains nozzle preheating, which warms the next nozzle while the current one keeps printing, and filament assignment by print structure, letting users give walls, infill, solid infill and the wipe tower their own filaments.
Infill, Surfaces and Speed
Adaptive TPMS infill is the new structural option. TPMS stands for triply periodic minimal surface. Creality's adaptive version generates a 3D infill structure whose density varies with each region's distance from the model surface, and it supports three configurations: dense outside and sparse inside, approximately uniform, and sparse outside with dense inside.
ZAA, short for Z anti-aliasing, targets the stair-stepping that shows up on curved, domed and sloped top surfaces. According to the release notes it locally adjusts the Z height of toolpaths on those surfaces to better follow the model geometry. Creality warns that it may slightly increase slicing time and recommends printing at about 150 mm/s or lower. How it compares with other slicers' approaches to the same problem will have to wait for hands-on testing.
The remaining items are workflow polish. Auto-orientation now uses GPU acceleration, which Creality says cuts typical waits on complex models from 1 to 2 minutes down to a few seconds. Slicing time for high-infill single models and full-plate models is reduced by approximately 10%, the download page lists upgraded AI Assistant and AI parameter recommendations, and large full-plate 3MF files open approximately 50% faster.
What It Means for Makers
Creality Print 7.3.0 is a clear signal that full-color printing is where the company sees its slicer competing. The purge changes address one of the biggest practical objections to multi-color printing, which is how much filament it throws away.
The caveats are the usual ones for a vendor release. Every number here, from the deltaE00 results to the 3MF load time, comes from Creality, and the color validation cites only a limited set of filaments such as Hyper PLA. Linux users are also left out, since the download page lists only Windows and Mac. If you run a multi-material Creality machine, especially a K3, this is a worthwhile update to try; just calibrate your expectations on other filaments until independent results arrive.
