Converting a mesh with no settings

Not every .3mf was sliced. One built from an STL or OpenSCAD file carries a mesh and nothing else, and Converting a file still works on it.

Converting a mesh with no settings

Convert still works on a mesh-only file: pick a target and it writes that slicer's own stock printer, filament and process. Until you pick one, the origin badge reads Mesh only, every rig row's source cell shows a dash, and the lead line says so:

No print settings in this file. Convert writes the target's stock
printer, filament and process. Pin your own below.

Each target has one stock printer:

The filament and process come from that printer's own declared defaults. Converting into Bambu Studio anchors on Bambu PLA Basic and 0.20mm Standard, and the Notes table names each pick:

Printer · — · Bambu Lab A1 · No source printer. preslice default for Bambu Studio
Filament 1 · — · Bambu PLA Basic · Bambu Studio's default for Bambu Lab A1
Process · — · 0.20mm Standard · Bambu Studio's default for Bambu Lab A1

Cura is the exception: it resolves the quality Cura itself would stack for the printer's nozzle and material, instead of one flat default.

In Changes, the conversion reads:

converted [Mesh only] → [Bambu Studio]

Placement with no source bed

A mesh-only file has no plate either. Its parts keep their spacing to each other, but the whole group moves onto the target bed: centred in x and y, lowest point at z = 0. The Notes table names it too:

Placement · — · centred, z = 0 · No source bed

Pinning your own hardware

The stock printer, filament and process are only the defaults. Enable Change printer, Change filament, or the other sections below the rig, and pin what you actually have. The pin replaces the default, and its Notes row disappears.