Colormix Voronoi Pumpkin Box

This is a parametric low-poly Voronoi pumpkin box designed specifically with Prusa ColorMix in mind. The pumpkin is not just a decorative model. It is a functional box consisting of three parts: the Pumpkin Body, the Pumpkin Lid, and a separate Pumpkin Stem. The lid is centered by an integrated lip, and the stem is connected to the lid with a peg-and-hole joint. The Voronoi pattern is part of the actual geometry. The cells follow the complete pumpkin surface, while the characteristic pumpkin ribs remain visible underneath the pattern. The facets are deliberately planar to create the low-poly appearance.

From an AI concept to a parametric Blender model

The project started with an initial visual concept generated with ChatGPT: a low-poly pumpkin with a Voronoi color pattern. Based on this concept, Claude was used to develop a parametric Python generator for Blender 5.2. Instead of manually modeling one fixed pumpkin, the Python script generates the complete model from a configurable set of parameters. Among other things, the diameter, height, number of ribs, groove depth, number, and randomness of Voronoi cells, wall and floor thickness, lid position, tolerances, and stem geometry can be adjusted before generating the model. Changing the random seed also creates a completely new Voronoi layout without requiring the pumpkin geometry to be redesigned manually.

Designed as a printable box

The model was developed with FDM printing in mind. The inner wall below the lid lip slopes down towards the cavity so that there is no horizontal internal overhang. The lid fits over the integrated lip, while the separate stem plugs into a pocket and peg in the lid. The resulting model consists of three independently printable components:

• Pumpkin Body

• Pumpkin Lid

• Pumpkin Stem

Prusa ColorMix

The colors used are the Prusament PLA ColorMix CMYWK Bundle together with Prusament PLA Prusa Orange. The digital filament colors were not selected by visual approximation. The HEX reference colors were taken from the OpenPrintTag Material Database, and these values were used as the basis for the physical and virtual extruders in the Color Mix Lab workflow.

The physical filament colors used for this model are:

• Prusament PLA ColorMix Cyan — #00AED5

• Prusament PLA ColorMix Magenta — #D25B96

• Prusament PLA ColorMix Yellow — #FFCE02

• Prusament PLA ColorMix White — #F1E8DD

• Prusament PLA ColorMix Black — #544F4D

• Prusament PLA ColorMix Gold — #DDCAA9

• Prusament PLA ColorMix Silver — #A4A09F

• Prusament PLA Prusa Orange — #FF7041

Gold and Silver are the two glitter-effect colors from the seven-color ColorMix bundle.

Virtual extruders and color mixing

The object and the physical filament colors were imported into Color Mix Lab, where virtual extruders were created by mixing the available filaments in different ratios. This produces a significantly larger orange, brown, and beige palette than would be possible with the physical filaments alone. The resulting virtual colors were then assigned to the individual Voronoi cells.

Preparing the 3MF for PrusaSlicer

After the Color Mix Lab workflow was completed, the model was exported as a PrusaSlicer 3MF project. One additional issue had to be solved during preparation: using PrusaSlicer's regular Split function on this multicolor project caused the ColorMix and virtual-extruder assignments to be lost. ChatGPT was therefore used again to restructure the 3MF internally. The original geometry, multimaterial painting information, and virtual-extruder definitions were preserved, while the combined model was converted into three independent PrusaSlicer objects. This made it possible to distribute the components over two build plates without losing the ColorMix information.

Included source files

The download also includes the Blender file and Python generator, so the published pumpkin does not have to be treated as a fixed design. The parameters in the Python script can be modified to generate variants with different proportions, a different number of ribs, more or fewer Voronoi cells, another random seed, different clearances, or a completely different color palette. The OBJ/MTL version is also included as an intermediate model format, while the prepared 3MF project is intended for users who want to open the finished ColorMix version directly in PrusaSlicer.

AI-assisted design workflow

This project deliberately combines several tools rather than using AI simply to generate a finished mesh. ChatGPT was used to develop the original visual concept. Claude assisted with the development of the parametric Blender Python generator. Blender 5.2 generated the actual printable geometry. Color Mix Lab was used to create the virtual color palette, and ChatGPT was used again to restructure the finished 3MF while preserving its multimaterial information. The final model is therefore not an AI-generated mesh. It is deterministic, editable geometry generated by Blender from defined Python parameters. The AI tools were used as part of the concept, development, and preparation workflow rather than as a replacement for the underlying parametric model.