SoftFever
91ad6954ea
# Description Slicing performance work, split out of #14662 so it can be reviewed on its own. No new features and no behaviour change: the same G-code, produced faster. Nothing here knows about texture displacement. The trigger was a plate that took about 24 min to slice at 0.1 mm once a colour texture was baked onto it. The cause is general, not texture-specific: ClipperLib's sweep line costs grow with the number of edges crossing a scan line, and any layer cut into tens of thousands of small pieces (fine relief, dense colour painting, heavily fragmented models) makes several per-piece loops redo whole-layer work. ## What changed **Restrict whole-layer work to the neighbourhood that needs it** - `make_fills`: clip the layer's no-overlap area to each expolygon's box before intersecting. - `discover_vertical_shells`: the small-piece filter compares only against the nearby part of the layer. - `bridge_over_infill`: whole-layer union/diff/intersection restricted to the candidate's neighbourhood; fill boundary expanded once per spacing; anchor tree built only from lines crossing the scan range; bbox pre-check in the collision test. **Batch booleans by tile instead of per piece.** `ClipperUtils::tile_expolygons` groups a layer's pieces into tiles, so a huge clip contour is clipped once per tile rather than once per piece. `detect_surfaces_type` at 0.1 mm went from about 145 s to about 50 s. **Parallelize what is already independent:** a layer's regions in `detect_surfaces_type`, `process_external_surfaces` and `discover_vertical_shells`; wall generation and solid infill splitting; colour segmentation and vertical shells. **Stop copying polygons on move.** `MultiPoint` had no `Points &&` constructor, so every derived move constructor passing `std::move(points)` copied them. Added it, marked the moves `noexcept`, and made `append(vector&&)` move its elements. Note the consequence: a moved-from `Polygon` or `Polyline` is now really empty where it used to silently keep its points. **Seam placement.** `visit_nearby_points` visits candidates as the k-d tree finds them instead of collecting them into a vector first. **Travel ordering and sharp-tail detection** test only the pairs whose boxes can meet, through a uniform grid and a bbox pre-filter, instead of every pair. ## Results | | before | after | |---|---|---| | Painted plate, 0.1 mm, 2000k triangles | 1447 s | 587 s | | Same plate, default 750k | 99.5 s | 85.6 s | | Unpainted, 0.1 mm | 523 s | 430 s | ## Tests **179 of 179 G-code outputs byte-identical** across 11 models and 17 configurations (default, fine layers, zero and dense infill, no shells, normal and tree supports, extra bridge layers, interface shells, three `ensure_vertical_shell_thickness` modes, thick walls, spiral mode, five seam modes), comparing full library builds of this branch against its merge base. The painted plate is part of that matrix, and it is the case whose layers reach the tiling threshold at all. New unit tests: - `test_kdtree.cpp`: the visiting and collecting searches return the same points in the same order, and a radius search returns exactly the points inside the radius. - `test_clipper_utils.cpp`: the tiled and plain `diff_ex` and `intersection_ex` return the same rings with the same coordinates, with and without the safety offset, compared after rotating each ring to its lowest point and sorting. The fixture asserts it really is split into more than one tile, so it cannot quietly stop covering the tiled path.
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:
|
⚠️ CAUTION: Several clickbait and malicious websites, such as orca-slicer[.]com and orcaslicer[.]net, are pretending to be the official OrcaSlicer site. These sites may redirect you to dangerous downloads or contain misleading information. Our only official website is www.orcaslicer.com. If you come across any of these in search results, please report them as unsafe or phishing to help keep the community secure with: - Google Safe Browsing - Microsoft Security Intelligence - IPThreat |
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. - Belt Printer Support
Slice for belt / conveyor (infinite-Z) printers, with belt-aware supports and a tilted-bed preview. Contributed by Joseph Robertson (@HarrierPigeon). - IDEX/IQEX Parallel Printing Support
Print copies or mirror images of a part on every carriage of an IDEX or IQEX printer at once, with the mode chosen per plate and nozzle clearance zones shown on the bed. Contributed by Clifford (@cgarwood82). - 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.
Windows release binaries are code signed; see our Code signing policy.
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. Both x64 and arm64 installers are published — pick the one matching your CPU.
-
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
-
Download the universal DMG, which runs on both Apple Silicon and Intel Macs.
-
Drag OrcaSlicer.app to Application folder.
-
If you want to run a build from a PR, you also need to follow the instructions below:
Quarantine
-
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
-
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
-
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).
-
Download App image from the releases page.
-
Double click the downloaded file to run it.
-
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
|
|
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.
Code Signing Policy
Free code signing provided by SignPath.io, certificate by SignPath Foundation.
Windows release binaries are built by GitHub Actions from this repository and signed through the SignPath Foundation program. Every signing request is manually approved.
Team roles: SoftFever is the committer, reviewer and approver for all signed releases.
Privacy policy: See the OrcaSlicer privacy policy.
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.