A coloured part has to reach the slicer with volumes that can be assigned to filaments. The file format decides which information will be available.
See whether the file contains volumes and colour information or only a geometric surface.
Split coloured parts into volumes that can each take a different filament.
Open the 3MF in your slicer and choose which material or colour each volume will use.
Check scale, assembly, colours, material changes and print settings.
The printer and the slicer need to know which filament belongs to each part of the model. A colourful image on screen is not enough if the model is not split in a usable way.
These regions can exist as independent volumes or as paint information that works with your slicer's workflow.
A standard STL mainly describes the surface of the geometry. It usually has no volume names, assembly or colour data showing where one filament ends and another begins.
When that information is missing, separating colours from an STL means editing or rebuilding the geometry into independent parts. Gestor 3D does not claim to detect colours that are not in the file.
The 3MF format can hold more production information than a standard STL. Files prepared in Bambu Studio or OrcaSlicer can keep volumes and paint data that are useful for a multicolour project.
The Gestor 3D 3MF splitter identifies compatible regions, organises the volumes and creates a new file so you can carry on preparing the print.
Separate colours in a 3MF fileAfter separating the file, assign the volumes to filaments and check that every region has the expected colour.
Also review scale, position, fits, supports and material changes before starting the print.
Not automatically. A standard STL rarely stores colour information. If the model is a single mesh, you may need to edit it and create separate volumes.
Because the format can preserve assembly, multiple volumes and colour information that help the slicer organise the filaments.
It prepares and organises the file, but you should always open the result in your slicer to check filaments, scale, assembly and settings.
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