Hitem3D Split and Multicolor: The Essentials

Hitem3D Split and Hitem3D Multicolor are two print-prep tools that pick up where an image-to-3D generator leaves off. Split cuts a finished mesh into clean, assembly-ready pieces with real print joints. Multicolor reduces a textured model to a fixed palette of flat colors so it maps onto a multi-filament printer. Run either on a model from Sparc3D or any other 3D source, on its own or one after the other, to turn a single dense mesh into a print-ready, multi-part, multi-color kit.

Which Model Should I Use?

They solve different problems, so many workflows use both: Split to break the model into parts, Multicolor to set the color palette on each part. Neither one generates geometry, so bring your own mesh (Sparc3D and the wider Hitem3D family pair naturally with these tools).

How to Use the Models

Hitem3D Split

Split takes a single mesh and cuts it into separate, watertight pieces. It has two modes. Character mode uses anatomy-aware templates: pick how many parts you want, from a two-part split up to a full six-part breakdown, and a joint style for the seams. General mode ignores anatomy and cuts any object by a granularity setting instead.

The character templates run from a (six parts) through f (two parts), so you can match the breakdown to your printer bed and your painting plan. The example below is the six-part template with dovetail joints, which gives every seam a slide-fit key that holds the assembly together without glue.

Character mode, six-part template (part a), dovetail joints. Source: a Sparc3D robot · Open on Scenario

Joints matter as much as the cut. none leaves a clean flat face, ball adds a snap-fit peg and socket, and dovetail cuts an interlocking wedge. The next example uses the four-part-with-head template and a plain cut, which is the fastest to print when you plan to glue.

Character mode, four parts with head (part d), no joint · Open on Scenario

For props and non-character objects, General mode is the right call. Granularity controls how many pieces you get: low makes a few large chunks, high makes many smaller ones. High granularity is useful when a shape has thin or overhanging areas that print better separated.

General mode, high granularity, on a non-character object · Open on Scenario

Hitem3D Multicolor

Multicolor takes a textured GLB and snaps its surface colors down to a fixed number of flat regions, from a single color up to eight. Fewer colors give a bold, poster-like look; more colors keep shading and detail. There are no gradients in the result, so a slicer can map each region straight onto a filament. The examples show the original model beside its Multicolor output.

Set numberColor to 0 when you plan to keep the maximum palette and refine the colors downstream. Set it to 2 or 3 for the boldest, most obviously multi-filament look.

Using the two together

The two tools chain cleanly. Generate a model (for example with Sparc3D), run Split to break it into parts, then run Multicolor on each part to set its palette. The result is a kit where every piece prints in its own filament and clicks together on its joints, with no manual masking or hand-painting.

Parameters

Both models take a mesh plus a small set of settings. There is no text prompt.

mesh (Split and Multicolor)

Required. The model to process. Split accepts GLB, STL, or OBJ up to 200MB. Multicolor expects a textured GLB (vertex colors or a texture), since it works from the model surface color.

modelName (Split)

Chooses the split strategy: character uses anatomy-aware part templates and joints, general cuts any object by granularity. The part and joint settings apply only to character; level applies only to general.

part (Split, character)

The character breakdown template: a six parts, b five parts, c four parts without the head, d four parts with the head, e three parts, f two parts. See the six-part and four-part-with-head examples above.

joint (Split, character)

The seam style: none for a clean flat cut, ball for a snap-fit peg and socket, dovetail for an interlocking slide-fit wedge. The hero example uses dovetail; the four-part example uses none.

level (Split, general)

Granularity for General mode: low, medium, or high. Higher granularity produces more, smaller pieces, as in the general-mode example above.

numberColor (Multicolor)

How many flat colors to keep, 1 to 8. Fewer colors read as bold and poster-like (see the two-color horse head); more preserve shading. Use 0 to keep the maximum number of colors when you intend to edit the palette downstream (see the max-colors dragon).

Use Cases

• Tabletop and collectibles: break a hero character into a six-part figurine kit with snap-fit joints, then set a clean filament palette per part.

• Fits-any-printer: split an oversized model so each piece fits a smaller print bed, then assemble on the joints.

• Painting and finishing: separate parts along natural seams so hard-to-reach areas are easy to prime and paint before assembly.

• Multi-filament prints: reduce a colorful model to a fixed palette so a multi-material printer can map each region to a filament with no manual masking.

• Product and concept models: turn a generated concept into a physical, multi-color desk model for reviews and pitches.

Tips for Better Results

1. Match the part count to your bed and plan. Use the six-part template for detailed figures you will paint, and the two- or three-part templates when you just need the model to fit the printer.

2. Pick joints by whether you will glue. Choose none for a glued assembly, ball for a repositionable snap-fit, and dovetail for a glue-free slide-fit that stays put.

3. Raise General granularity for tricky shapes. If a prop has thin walls or overhangs, high separates them into pieces that print more reliably.

4. Feed Multicolor a genuinely colored model. The tool works from surface color, so a vertex-colored or textured mesh (like a Sparc3D output) gives it something to quantize.

5. Fewer colors for punch, more for realism. Two or three colors give the clearest multi-filament look; six to eight keep more of the original shading.

6. Use numberColor 0 when editing downstream. Keeping the maximum palette leaves the most room to adjust colors before you commit to filaments.

7. Split first, then Multicolor. Breaking the model into parts before setting palettes makes it easy to give each piece its own filament.

Known Limitations

• Neither tool generates geometry. Both need an input mesh. Pair them with an image-to-3D model like Sparc3D to create the model first.

• Multicolor needs surface color. A plain, untextured mesh has nothing to quantize; give it a vertex-colored or textured GLB.

• Color counts are approximate to your subject. A model dominated by one color will look nearly single-color at low counts; raise numberColor or choose a more varied subject to see distinct regions.

• Character templates assume a character. For vehicles, props, and scenery, use General mode, which splits by granularity instead of anatomy.

• Previews render the mesh, not print settings. The in-app turntable shows geometry and color; verify wall thickness and joint tolerances in your slicer before printing.