451d2f946f
* feat: native Windows ARM64 build support Builds on the merged DEPS_ARCH=arm64 plumbing (#13424) by adding the dependency and source fixes needed for a green native ARM64 build on the windows-11-arm runner. Validated end-to-end on Snapdragon X Elite hardware (via a downstream fork using the same fixes); see OrcaSlicer/OrcaSlicer#8271 for the full writeup. Dependencies: - OpenEXR 2.5.5: ImfSimd.h hard-codes IMF_HAVE_SSE2 for any MSVC, pulling in <emmintrin.h> (x86-only) -> C1189. Patch the header to require an x86 target and force SSE cache vars off on ARM64. - Boost.Context: use the winfib implementation on ARM64 (Windows Fiber API) to avoid the armasm64 / CMake ASM_ARMASM linker-module bug, while keeping the Boost::context target Boost.Asio needs. - OpenCV: disable WITH_IPP on ARM64 (Intel IPP/IPP-ICV is x86/x64 only; otherwise ~200 unresolved ippicv* externals at link). - OpenSSL: use VC-WIN64-ARM on ARM64. - FindGLEW: add an ARM64 arch branch. Sources: - clipper Int128.hpp: _mul128 is an x64-only intrinsic guarded by _WIN64 (true on ARM64); guard on _M_X64 and use the portable path. - imgui imgui_widgets.cpp: fix va_start(vaList, &text) -> va_start(vaList, text) (the &-form compiled on x64 but is invalid on ARM64). - crash reporter: StackWalker.cpp gains an _M_ARM64 branch; BaseException.cpp uses Cpsr instead of the x86-only EFlags on ARM64. CI: - New build_windows_arm64.yml on windows-11-arm: pins CMake 3.31.x, stages ARM64 GMP/MPFR from MSYS2 clangarm64 (with llvm-dlltool import libs), caches deps with a fixed-depth hashFiles key, builds and uploads the binary. OCCT/STEP, SVG-to-3D and text emboss all build and work on ARM64 (no stubs needed). Full feature parity with x64. * fix(ci): use forward-slash DESTDIR to avoid CMake '\a' escape error deps configure failed at GMP/GMP.cmake: "Invalid character escape '\a'" because DESTDIR carried Windows backslashes (C:\a\...) and is re-parsed when re-set with the /usr/local suffix. Pass DESTDIR (and the slicer's DEPS prefix) with forward slashes via %CD:\=/%. * fix(ci): don't export DESTDIR env var (CMake staged-install doubles paths) Setting a DESTDIR *environment* variable made CMake treat it as the staged install prefix and prepend it to every dependency's install path, so e.g. FreeType installed to <DESTDIR>/a/.../OrcaSlicer_dep/usr/local and OCCT then couldn't find its headers. Compute the forward-slash path into a differently-named var (ORCA_DESTDIR) and pass it only via -DDESTDIR. * ci(windows-arm64): fold ARM64 build into the standard Windows matrix Replace the standalone build_windows_arm64.yml with a matrix entry on the existing build_windows job, so x64 and ARM64 share one reusable workflow chain (build_all -> build_check_cache -> build_deps -> build_orca), per review feedback on #14059. - build_all.yml: build_windows now matrices over {x64: windows-latest, arm64: windows-11-arm} and threads `arch` through. Self-hosted runner stays x64-only. - build_check_cache.yml: cache key and dep-prefix path are now architecture-specific on Windows (deps/build-arm64/OrcaSlicer_dep). - build_release_vs.bat: accept an `arm64` argument (mirrors build_release_vs2022.bat) -> uses `-A ARM64` and the build-arm64 tree. The top-level CMake auto-derives CMAKE_PREFIX_PATH from the build dir, so no explicit prefix is needed. - build_deps.yml / build_orca.yml: gate the ARM64-only prep behind `inputs.arch == 'arm64'` -- pin CMake 3.31.x, and stage MSYS2 clangarm64 GMP/MPFR import libs. NSIS installer/PDB/profile_validator remain x64-only; ARM64 ships the portable zip. Artifact names get an arch suffix to avoid collisions between the two Windows jobs. https://claude.ai/code/session_0164c7ZhCLsYBmCiVN9pWDjK * ci(temp): generate GMP/MPFR win-arm64 blobs to commit to repo * feat(deps): add prebuilt GMP/MPFR win-arm64 blobs The repo ships prebuilt GMP/MPFR import libs + DLLs for win-x64 and win-x86; the Windows ARM64 build path copies from win-${DEPS_ARCH} (CMakeLists.txt) but the win-arm64 blobs were missing, so the slicer configure failed at "file COPY cannot find .../win-arm64/libgmp-10.dll". Add win-arm64 libgmp-10.{dll,lib} and libmpfr-4.{dll,lib}, generated from the MSYS2 clangarm64 gmp/mpfr packages with MSVC-compatible import libs via llvm-dlltool. Headers are shared across arches and unchanged. * simplify OpenEXR.cmake * set default arch * support msix * ship installer * try to fix webview2runtime issue --------- Co-authored-by: Adam Behrman <adam.behrman@gmail.com> Co-authored-by: Claude <noreply@anthropic.com> Co-authored-by: Adam Behrman <abehrman@users.noreply.github.com>
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.
How to install
Windows
Download the Windows Installer exe for your preferred version from the releases page.
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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
Windows Package Manager
winget install --id=SoftFever.OrcaSlicer -e
Mac
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Download the DMG for your computer:
arm64version for Apple Silicon andx86_64for Intel CPU. -
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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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 I'm deeply grateful to all my sponsors and backers.
Their generous support enables me to purchase filaments and other essential 3D printing materials for the project.
Thank you! :)
Sponsors
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Backers:
Ko-fi supporters ☕: Backers list
Support me
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.