How to Open 3MF Files in OrcaSlicer
OrcaSlicer is a free, open-source slicer forked from Bambu Studio that supports printers from many brands.
Short answer · Built in
Yes. OrcaSlicer opens 3MF files as shipped: File › Import (Ctrl+I), or open it as a project.
Import 3MF into OrcaSlicer, step by step
- 1Check the fileA 3MF is a zipped package that can contain several objects, colours and print settings; don't unzip it before importing.
- 2Import into OrcaSlicerFile › Import (Ctrl+I), or open it as a project.
- 3Check scale and orientationOrcaSlicer works in millimetres and is Z-up. 3MF files are millimetres, stored in the file, so they normally arrive at the right size.
- 4Place it and sliceLay the flattest face on the plate, confirm the dimensions in the object panel, and slice. Slicers ignore textures and animation.
What comes through
| Shape | Yes, always. |
| Colours and materials | Ignored: OrcaSlicer only uses the shape. |
| Textures | Not used by a slicer. |
| Animation | OrcaSlicer doesn't play animation. |
Things to watch for
- 3MF projects keep plates, colours and print settings.
- Run the built-in calibration prints (flow, pressure advance, temperature) once per filament; they matter more than model tweaks.
Questions
- Does OrcaSlicer support 3MF files?
- Yes. OrcaSlicer opens 3MF files as shipped: File › Import (Ctrl+I), or open it as a project.
- Why is my 3MF model the wrong size in OrcaSlicer?
- 3MF files are millimetres, stored in the file, while OrcaSlicer works in millimetres. Scale the model after importing, then apply the scale before you continue.
- What is the best 3D format for OrcaSlicer?
- 3MF and STL are the most reliable choice for OrcaSlicer. 3MF is one of them, so you're already using a good option.
Menu names follow the OrcaSlicer open-source project's current release. Check the official OrcaSlicer documentation if your version differs.
Written with AI assistance by the Renderlyst team in October 2026. Format support reflects each app's current release as we understand it, and we link the official documentation so you can confirm it for your version. Spotted something out of date? Email alishbakhalid766@gmail.com.