ColorStack Turns Game Assets and 3D Scans Into Full-Color FDM Files for $10

Color-stack.com is a $10 standalone Windows and Mac application from developers Chase Mussey and Javier Herrera. Designed to help you prepare exceedingly colorful multicolor 3D prints, it takes color texture data – say from a 3D scan, or gaming asset – and translates it into color mapping for your 3D printer to follow, alternating the filament used at each layer.

Sound familiar? There’s a lot of virtual-color printing going around at the moment, much of it stemming from a Reddit thread where Mussey and Herrera first showed off the layer interpolating technique they had been experimenting with. This thread also involved Ratdoux, who successfully launched the technique for a wider audience as the FullSpectrum Snapmaker OrcaSlicer fork, which we tested back in March.

Context: The CMYK subtractive color model from physical print production forms the theoretical basis for this crop of color-3D printing innovation. The important thing to remember is that an expanded range of colors is produced by combining Cyan, Magenta, Yellow, and Key (black), collectively referred to as CMYK. Transparency matters in 3D printing these combinations. Black filament would be too light blocking to work effectively when mixed into other layers, and so white or grey are often used instead to boost the efficacy of the effect.

ColorStack is distinctively different, picking up where the virtual color and gradient creation of FullSpectrum currently ends by automatically converting textured 3D models into cyan, magenta, yellow, white, and black (CMYW/K)-layer sequences for multi-filament FDM printing – effectively “baking” the color texture data onto the model to be printed from CMYW/K-color filaments.

It accepts OBJ files that already carry UV-mapped textures or vertex color data. Think game assets, photogrammetry scans, and image-to-model AI tools – the sorts of files that typically live in digital asset repositories like Fab. Between the OBJ model data and an image file with the texture information, ColorStack runs them through an automated pipeline, converting this RGB data into CMYW/K channel weights, and outputs an OBJ file with each face assigned to a filament material slot. Import that into your slicer, mapping the channels to the CMYW/K filaments on your machine, and print. As with the FullSpectrum slicer, thin layer heights (0.08 mm is the default) are a necessity in order to cram more component colors into the model to give more realistic results.

That automated pipeline is the point, eliminating manual in-slicer paint jobs by working with the color data that’s already available for the model.