btu converts Bambu Studio 3MF material assignments into a Snapmaker U1 3MF while preserving the source model geometry. It supports both ordinary 5 geometry-layered projects and Bambu native Full Spectrum mixed materials. For ordinary projects, colors that cannot use a physical filament slot are automatically converted into U1 Full Spectrum mixtures.
The built-in U1 baselines supply printer, process, and physical filament profiles for 0.2, 0.4, 0.6, and 0.8 mm nozzles. The source supplies geometry, layer height, material references, face painting, and supported mixed-material definitions. An optional U1 3MF can override the built-in baselines.