Supported files
3MF files are ZIP archives with the model and extra information from the slicer. 3MF Library reads:
| From | What |
|---|---|
| Bambu Studio, OrcaSlicer | One preview per plate (Metadata/plate_N.png), plate names, the objects on each plate, print time and filament weight per plate, filament colours |
| PrusaSlicer and others | The preview image (Metadata/thumbnail.png and similar) |
| MakerWorld downloads | Title, designer, licence, description (with its formatting) and the photos (Auxiliaries/Model Pictures) |
| The model itself | Size, number of triangles; geometry for the 3D viewer, painted colours included |
A 3MF without any image gets a rendered preview of its geometry. Files from all common slicers work; the richest pages come from Bambu Studio and OrcaSlicer projects.
STL files (binary and text) get a rendered preview and the 3D viewer. STLs larger than 1 GB are listed but not rendered.
Other files
Section titled “Other files”Images, PDFs, ZIPs and any other files in your folders are listed under Other files on the folder page, with a download link. Images get a small thumbnail. They’re also found by search.
Limits
Section titled “Limits”| Triangles in a 3MF | up to 30 million |
| Triangles in an STL | up to 25 million |
| 3D viewer | simplified to about 750,000 triangles for the browser; the downloaded file is always the original |
A file that can’t be read (damaged, or over a limit) still appears, with a “Could not read” message. It’s read again when it changes. Files that the library folder couldn’t deliver (a network or permission problem) are tried again within the hour.
What isn’t used
Section titled “What isn’t used”The site doesn’t slice, convert or change files, and doesn’t read G-code. It doesn’t need network access: everything comes from the files themselves.