From 3MF to a multicolor print

Start with a painted project

A 3MF can contain a single-color mesh or a painted project. Converting STL to 3MF alone adds no color. Select a file explicitly marked multicolor and open it with its project information. Importing geometry alone can discard project settings.

Match your actual printer

1. Select your printer, nozzle diameter and build plate.
2. Check the project's filament list and assign your available materials and colors.
3. Map those colors to your AMS or other compatible material system before printing.
4. Count required colors. A four-slot system cannot automatically supply eight distinct filaments at once.

Review settings after changing profiles. Do not use another printer's G-code.

One object can still have colored regions

The object filament dropdown affects the whole mesh. Use Color Painting for regions. Zoom into eyes, teeth and mouth boundaries; fill tools follow mesh boundaries and may spill into adjacent areas. Brush corrections can be needed. Surface painting does not split a model into removable parts.

Check the sliced layers

Slice with your actual setup. Inspect the preview by filament, including eyes, mouth, small details, supports and the first layer. Confirm the intended colors remain present in the toolpaths. Check estimated time and material before starting. A colored render alone does not prove the project is ready to print.

Smooth shading changes the display, not the underlying geometry. Keep a backup before repairs; inspect thin features after any mesh changes.

Official instructions

Bambu Studio multicolor printing · Color Painting · OrcaSlicer documentation