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# Description This PR redesigns `filament_id` across OrcaSlicer's profile library, so that one filament product now carries one consistent id everywhere it ships, instead of a hand-written value that unrelated materials routinely shared. Minting scripts and CI checks come with it so future profiles comply by construction: a new filament takes its id from the tool, and the checks reject a hand-written, duplicated or drifted one before it can merge. Unique, non-duplicated ids are a precondition for AMS-style spool syncing to be dependable — the id is what a printer matches a physical spool against, and while two products share one, the match is a coin toss. This PR lays that groundwork. A follow-up PR will publish an OrcaSlicer materials reference on the wiki, giving every system profile one place to point at. `filament_id` names one filament product, and it is what a device matches a physical spool against: Bambu AMS, Creality CFS, the Qidi box, Klipper and Snapmaker all resolve a tray to a preset by id alone, first hit wins. Those ids were written by hand, and on `main` 99 of them stand for 674 different products — `GFL99` alone covers 132, from Anycubic PLA to Bambu PLA Matte. Every consequence is silent: a spool resolves to whichever preset happens to load first, tray names and support-material flags are read off the wrong material, and the second preset holding a duplicated id disappears from the tray-edit dialog entirely. The id is now a hash of `(filament_vendor, filament_type, filament name)`, so one spool product carries one id in every bundle that ships it, two vendors shipping the same product converge on it without coordinating, and a collision cannot be authored by hand. Every ambiguity across 48 vendors is fixed rather than excused — no grandfather list and no per-vendor carve-out, Bambu's bundle included — and the resulting landscape is frozen in `scripts/filament_id_snapshot.json`, so a change to any filament's identity lands as a reviewable diff to one file. CI now runs the duplicate-subtype validation tree-wide instead of over Bambu only. Letting the id follow the product meant correcting the identities themselves. Generics that shipped under a vendor prefix now have one name and one id everywhere (`Blocks Generic PETG` is `Generic PETG @Blocks`), presets whose `filament_vendor` or `filament_type` contradicted the spool are fixed, and duplicate pairs are collapsed onto the better-configured survivor. Renames carry `renamed_from`, so existing projects and user presets keep resolving. Bambu's printers, its AMS and its cloud know only Bambu's own catalog ids, so those ids leave the profiles entirely. The Bambu bundle mints like every other vendor, and the printer agent swaps in the catalog value only where an id crosses to or from a Bambu printer — outbound MQTT and FTP, the AMS mapping sent with a job, the ids written into a 3mf the printer will read — mapping back on the way in, so status messages, SD-card prints and projects saved by an older Orca or by BambuStudio all still resolve. The correspondence is generated from BambuStudio's own shipped bundle by `scripts/update_bambu_filament_ids.py`; an id with no row is forwarded untouched, a missing or malformed map degrades to no translation rather than taking the app down, and an agent whose printers already speak Orca's ids translates nothing. Two device-side bugs this work surfaced are fixed here as well. The Orca Filament Library was missing from the AMS material and calibration dialogs, which treated a filament with no `compatible_printers` as compatible with nothing while the rest of the app treats it as compatible with everything; and Creality CFS sync on a K2-family stock 0.4 nozzle picked the wrong preset, an imprecise matcher that duplicate ids had been masking. `docs/HLSD/filament_id.md` is the authoring rule for all of this. `scripts/orca_id_tool.py` mints both `filament_id` and `setting_id`, replacing `assign_vendor_setting_ids.py`, and the local `check_profile` scripts gained per-vendor scoping so one vendor can be checked without a tree-wide run. `scripts/tests/` covers the tooling; `tests/slic3rutils/` covers the boundary translation and the CFS matcher. Ids change for most products and nothing forwards the old value, so a tray or a calibration record still holding one falls back to matching by filament type until the filament is selected once. Beyond the profile fixes above no print settings change, except that a few presets stop claiming printers a dedicated variant already covers. # Screenshots/Recordings/Graphs <!-- > Please attach relevant screenshots to showcase the UI changes. > Please attach images that can help explain the changes. --> ## Tests <!-- > Please describe the tests that you have conducted to verify the changes made in this PR. --> `scripts/check_profile.sh`, the local twin of the "Check profiles" CI job, with `scripts/check_profile.bat` as its Windows entry point, passes on this branch: the extra JSON check reports no errors and no warnings, system validation and the now tree-wide filament-subtype check load all 66 vendors cleanly, all 1013 printer presets slice, and custom-preset validation passes against every fixture archive from v1.9.0 to v2.4.2. The id tooling has 176 unit tests (`python -m unittest discover -s scripts/tests`). The C++ suites pass too — 332 in `tests/libslic3r` and 126 in `tests/slic3rutils`, the latter including the boundary-translation and Creality CFS matching cases added here. <!-- > A guide for users on how to download the artifacts from this PR. --> [How to Download Pull Requests Artifacts for Testing](https://www.orcaslicer.com/wiki/how_to_download_pr_artifacts)
OrcaSlicer: an open source Next-Gen Slicing Software for Precision 3D Prints.
Optimize your prints with ultra-fast slicing, intelligent support generation, and seamless printer compatibility—engineered for perfection.
Official links and community
Official Website:
Github Repository:
Follow us:
Join our Discord community:
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Main features
- Advanced Calibration Tools
Comprehensive suite: temperature towers, flow rate, retraction & more for optimal performance. - Precise Wall and Seam Control
Adjust outer wall spacing and apply scarf seams to enhance print accuracy. - Sandwich Mode and Polyholes Support
Use varied infill patterns and accurate hole shapes for improved clarity. - Overhang and Support Optimization
Modify geometry for printable overhangs with precise support placement. - Granular Controls and Customization
Fine-tune print speed, layer height, pressure, and temperature with precision. - Network Printer Support
Seamless integration with Klipper, PrusaLink, and OctoPrint for remote control. - Mouse Ear Brims & Adaptive Bed Mesh
Automatic brims and adaptive mesh calibration ensure consistent adhesion. - User-Friendly Interface
Intuitive drag-and-drop design with pre-made profiles for popular printers. - Open-Source & Community Driven
Regular updates fueled by continuous community contributions. - Wide Printer Compatibility
Supports a broad range of printers: Bambu Lab, Prusa, Creality, Voron, and more. - Additional features can be found in the change notes.
Wiki
The wiki aims to provide a detailed explanation of the slicer settings, including how to maximize their use and how to calibrate and set up your printer.
Download
Stable Release
📥 Download the Latest Stable Release
Visit our GitHub Releases page for the latest stable version of OrcaSlicer, recommended for most users.
Nightly Builds
🌙 Download the Latest Nightly Build
Explore the latest developments in OrcaSlicer with our nightly builds. Feedback on these versions is highly appreciated.
Belt Printer Builds
The nightly release ships two parallel builds: the standard build and a belt-printer build. Both are attached to the same release — tell them apart by the filename suffix:
- Standard — no suffix (e.g.
OrcaSlicer_Windows_Installer_x64_nightly.exe) - Belt —
_beltsuffix (e.g.OrcaSlicer_Windows_Installer_x64_nightly_belt.exe)
The _belt builds add experimental support for belt / conveyor (infinite-Z) printers, where the model is sliced against a tilted belt surface instead of a flat horizontal bed. They include ready-to-use belt printer profiles, the full belt slicing pipeline (mesh rotation and G-code transforms), belt-aware support generation, and a tilted-bed preview.
⚠️ Belt printer support is under active development and is not yet merged into
main— it currently ships only in these parallel_beltbuilds, produced from thebelt-printerbranch. See tracking PR #14394 and the original documentation in #12998.
How to install
Windows
Download the Windows Installer exe for your preferred version from the releases page. Both x64 and arm64 installers are published — pick the one matching your CPU.
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For convenience there is also a portable build available.
Troubleshooting
- If you have troubles to run the build, you might need to install following runtimes:
- MicrosoftEdgeWebView2RuntimeInstallerX64
- vcredist2019_x64
- Alternative Download Link Hosted by Microsoft
- This file may already be available on your computer if you've installed visual studio. Check the following location:
%VCINSTALLDIR%Redist\MSVC\v142
Microsoft Store
Install from the Microsoft Store when you prefer a Store-signed package (helps on Windows 11 Smart App Control).
Windows Package Manager
winget install --id=SoftFever.OrcaSlicer -e
Mac
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Download the universal DMG, which runs on both Apple Silicon and Intel Macs.
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Drag OrcaSlicer.app to Application folder.
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If you want to run a build from a PR, you also need to follow the instructions below:
Quarantine
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Option 1 (You only need to do this once. After that the app can be opened normally.):
- Step 1: Hold cmd and right click the app, from the context menu choose Open.
- Step 2: A warning window will pop up, click Open
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Option 2: Execute this command in terminal:
xattr -dr com.apple.quarantine /Applications/OrcaSlicer.app -
Option 3:
- Step 1: open the app, a warning window will pop up
- Step 2: in
System Settings->Privacy & Security, clickOpen Anyway:
- Step 1: open the app, a warning window will pop up
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Homebrew Cask
brew install --cask orcaslicer
The Homebrew cask installs the official macOS DMG from GitHub Releases.
Linux
Flathub (Recommended)
OrcaSlicer is available through FlatHub:
Install from the command line:
flatpak install flathub com.orcaslicer.OrcaSlicer
flatpak run com.orcaslicer.OrcaSlicer
It can also be installed through graphical software managers (KDE Discover, GNOME Software, etc.) when Flathub is enabled. Search for OrcaSlicer in your software center.
AppImage
AppImages are published for both x86_64 and aarch64 (ARM64). Pick the file matching your CPU — the ARM64 build has aarch64 in its name (e.g. OrcaSlicer_Linux_AppImage_Ubuntu2404_aarch64_*.AppImage).
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Download App image from the releases page.
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Double click the downloaded file to run it.
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If you run into trouble executing it, try this command in the terminal:
chmod +x /path_to_appimage/OrcaSlicer_Linux.AppImage
How to Compile
All updated build instructions for Windows, macOS, and Linux are now available on the official OrcaSlicer Wiki - How to build page.
Please refer to the wiki to ensure you're following the latest and most accurate steps for your platform.
Klipper Note
If you're running Klipper, it's recommended to add the following configuration to your printer.cfg file.
# Enable object exclusion
[exclude_object]
# Enable arcs support
[gcode_arcs]
resolution: 0.1
Supports
OrcaSlicer is an open-source project, and we're deeply grateful to all our sponsors and backers.
Their generous support helps fund filaments and other essential 3D printing materials for the project.
Thank you! :)
Sponsors
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Backers:
Ko-fi supporters ☕: Backers list
Support the project
Some Background
Open-source slicing has always been built on a tradition of collaboration and attribution. Slic3r, created by Alessandro Ranellucci and the RepRap community, laid the foundation. PrusaSlicer by Prusa Research built on Slic3r and acknowledged that heritage. Bambu Studio in turn forked from PrusaSlicer, and SuperSlicer by @supermerill extended PrusaSlicer with community-driven enhancements. Each project carried the work of its predecessors forward, crediting those who came before.
OrcaSlicer began in that same spirit, drawing from BambuStudio, PrusaSlicer, and ideas inspired by CuraSlicer and SuperSlicer. But it has since grown far beyond its origins. Through relentless innovation — introducing advanced calibration tools, precise wall and seam control, tree supports, adaptive slicing, and hundreds of other features — OrcaSlicer has become the most widely used and actively developed open-source slicer in the 3D printing community. Many of its innovations have been adopted by other slicers, making it a driving force for the entire industry.
The OrcaSlicer logo was designed by community member Justin Levine.
License
- OrcaSlicer is licensed under the GNU Affero General Public License, version 3.
- The GNU Affero General Public License, version 3 ensures that if you use any part of this software in any way (even behind a web server), your software must be released under the same license.
- OrcaSlicer includes a pressure advance calibration pattern test adapted from Andrew Ellis' generator, which is licensed under GNU General Public License, version 3. Ellis' generator is itself adapted from a generator developed by Sineos for Marlin, which is licensed under GNU General Public License, version 3.
- The Bambu networking plugin is based on non-free libraries from BambuLab. It is optional to the OrcaSlicer and provides extended functionalities for Bambulab printer users.