① Bambu / MakerWorld / Orca 3MF → U1Drop a painted model .3mf (not a filament profile pack). Export keeps plate placement, supports, and process settings. Open in Orca as Project, not Import. First export free.

② Paint from scratch or Full SpectrumPaint Forge — load mesh + source photo in PHOTO tab. Not U1 Forge.

③ Photo → relief plaqueSpectrum Forge — export 3MF direct, or GLB pack (ZIP with source_photo.jpg) → Paint Forge.

④ External figurine GLBSkip both — drop in Paint Forge.

vs bl2u1 / Chrome extension / u1convertThose are free slot-remappers. U1 Forge also keeps plate placement, supports, brim, and process settings from the source project. Exports share an Inkwell wallet with Spectrum Forge (AI Eye palette) and Paint Forge (AI photo paint) — ink covers real AI API costs + hosting; Convert tab runs locally, first export free.