Wall order (wall_sequence)
Wall order is one of a fixed set of names. Bambu Studio, OrcaSlicer, Cura and Creality Print declare 2 to 4 names; PrusaSlicer declares none.
What does each slicer call it?
Five slicers, five spellings of one setting. The scope column is which preset the key belongs to, which is what decides whether changing it follows the printer, the filament, or the print profile.
| Slicer | Key | Scope |
|---|---|---|
| PrusaSlicer | external_perimeters_first |
process |
| Bambu Studio | wall_sequence |
process |
| OrcaSlicer | wall_sequence |
process |
| Cura | inset_direction |
process |
| Creality Print | wall_sequence |
process |
What does each slicer say about it?
Each slicer offers its own values, so each gets its own line.
- PrusaSlicer: On or off. Prints the outer wall before inner walls. Better dimensional accuracy, worse overhangs.
- Bambu Studio: Order of inner and outer walls: inner first, outer first, or inner-outer-inner. Outer last gives a cleaner surface.
- OrcaSlicer: Order walls print: inner then outer, outer then inner, or inner-outer-inner. Inner first gives better overhangs; outer first gives sharper dimensions.
- Cura: Wall order: outside in prints the outer wall first, inside out prints it last.
- Creality Print: Order of inner and outer walls: inner first, outer first, inner-outer-inner, or adaptive. Inner first helps overhangs; outer first tightens dimensions.
Where does it live in the file?
All five slicers file this under the process preset, so its value follows the print profile rather than the model. A .3mf is a zip, so unzip it and search for external_perimeters_first, wall_sequence and inset_direction, or open the file in preslice and read the Raw tab, which searches every member at once.
Four of the five slicers write their settings into a sidecar part beside the geometry. Cura writes them into the model XML itself, so there is no config part to open.
| Slicer | Part | Format |
|---|---|---|
| PrusaSlicer | Metadata/Slic3r_PE.config |
INI, one key = value per line |
| Bambu Studio | Metadata/project_settings.config |
JSON, one flat object |
| OrcaSlicer | Metadata/project_settings.config |
JSON, one flat object |
| Cura | 3D/3dmodel.model |
XML metadata inside the model part, under a cura namespace |
| Creality Print | Metadata/project_settings.config |
JSON, one flat object |
What values are valid?
Each slicer declares its own type, default, and bounds for its key. They do not always agree, and where they disagree the file is still valid in both: the slicer that wrote it is the one that enforced its own rule.
| Slicer | Type | Unit | Default | Range |
|---|---|---|---|---|
| PrusaSlicer | bool | not declared | 0 |
not declared |
| Bambu Studio | enum | not declared | not declared | 3 named values |
| OrcaSlicer | enum | not declared | inner wall/outer wall |
3 named values |
| Cura | enum | not declared | outside_in |
2 named values |
| Creality Print | enum | not declared | not declared | 4 named values |
PrusaSlicer declares no range for this key, so nothing in the file bounds it.
This value is not a number, so PrusaSlicer, Bambu Studio, OrcaSlicer, Cura and Creality Print declare no unit for it.
The slicers disagree on the type: PrusaSlicer as bool, Bambu Studio, OrcaSlicer, Cura and Creality Print as enum. preslice reads all of them.
The slicers do not accept the same names, which is what a value has to survive when a file moves between them:
- Bambu Studio and OrcaSlicer accept
inner wall/outer wall,outer wall/inner wall,inner-outer-inner wall - Creality Print accepts
inner wall/outer wall,outer wall/inner wall,inner-outer-inner wall,adaptive outer wall/inner wall - Cura accepts
inside_out,outside_in
Every type, default, and bound above is read from the slicer's own field definitions rather than from measurement: PrusaSlicer's PrintConfig.cpp, Bambu Studio's PrintConfig.cpp, OrcaSlicer's PrintConfig.cpp, Cura's fdmprinter.def.json and Creality Print's PrintConfig.cpp.
Can I read it from my own file?
Yes, without installing a slicer. Open preslice and drop a .3mf on the page. It unzips and parses the file in your browser, and shows wall order under its own name alongside the rest of the print settings. The file stays in your browser; see what leaves it.