OrcaSlicer 2.4.0-alpha

What's Changed

This is the OrcaSlicer V2.4.0 Alpha release. The headline feature is Orca Cloud — a new centralized platform for profile sync, preset bundle sharing, and community discovery at cloud.orcaslicer.com. This release also introduces Z Anti-Aliasing (ZAA) contouring for smoother top surfaces, an Expert user mode, native Wayland support for Linux, Machine Input Shaping, Optimized Gyroid infill, Prusa-style combined brims, a redesigned printer selection dialog, and a large number of bug fixes and profile updates.

Note: Please check #13828 for known issues.

☁️ Orca Cloud

Orca Cloud is now live at cloud.orcaslicer.com ↗ — a centralized platform that brings your 3D printing workflow online.

It keeps your printer, filament, and process profiles synchronized across every machine you use, lets you share finely tuned preset bundles with the community, and helps you discover configurations created by fellow makers around the world.

Think of it as the connective tissue between your slicer, your profiles, and the broader OrcaSlicer ecosystem — no more manually copying config files between computers or hunting through forums for the right profile.

Note: Orca Cloud is optional. Local profiles and existing OrcaSlicer workflows continue to work as before. You can keep using OrcaSlicer without logging in to Orca Cloud.

Open ecosystem: Orca Cloud is part of our long-term vision for an open 3D printing ecosystem. We want OrcaSlicer to connect users, contributors, printer manufacturers, filament makers, and hardware/software partners through shared profiles, better compatibility data, and smoother workflows. We welcome users, makers, manufacturers, and partners to join, integrate, and collaborate with us to build an ecosystem that benefits the whole community and the wider 3D printing industry.

This is just the beginning. We have many more features planned for Orca Cloud and the broader OrcaSlicer ecosystem.

Orca Cloud is designed with privacy in mind. Data is currently hosted in the USA. In the future, we plan to add more region-specific servers and allow users to choose their preferred data center location for improved performance, data residency, and privacy needs.

• Orca Cloud — Profile Sync, Version History, Preset Bundles, and Community Sharing github.com/OrcaSlicer/OrcaSlicer/pull/13414 ↗

Profile Sync: Log in to OrcaSlicer with your Orca Cloud account, and your printer, filament, and process profiles sync automatically across machines. You can also view and manage all synced profiles from the Orca Cloud web interface.

Orca Cloud profile sync interface

Profile Version History: Your cloud-backed profiles support version history on Orca Cloud. Mark milestones, track what changed, and revert to a previous version whenever you need — useful for recovering from a tuning session that did not work out, or rolling back to a known-good configuration before an important print.

Orca Cloud profile version history

Preset Bundles: Create shareable preset bundles with descriptions, images, version info, and compatible printer metadata. Publish them publicly for the community to discover, or keep them private and share only with specific collaborators.

Orca Cloud preset bundle editor

Community Explore: Browse public bundles shared by the community on the Orca Cloud website. Subscribe to bundles you like and they will sync to your slicer automatically, with update notifications when the author publishes a new version.

Orca Cloud community explore page

Full introduction video:

github.com/user-attachments/assets/c7031969-d8e1-4f0d-8344-79ce18ea1378 ↗

Orca Cloud Wiki: cloud.orcaslicer.com/wiki/ ↗

• Orca Cloud improvements and fixes by @peachismomo, @ExPikaPaka, @SoftFever, @andrewsoonqn, and @erpalma in #13755, #13745, #13757, #13778, #13673, #13738, #13793, #13645, #13756, #13779, #13776, #13781, #13796 and #13797 — Multiple follow-up improvements to the Orca Cloud experience: clearer visual distinction between Orca Cloud and Bambu Cloud login UIs, a force sync button for manually pushing profiles to the cloud (with a fix for the false "modified" highlight during sync), synced preset values now reflect in the UI immediately without needing to switch tabs, a consistent account display name between login and refresh, restored printer camera live view for cloud-connected printers (including H2D), clearer cloud error messages, HTTP error responses now show user-visible message boxes instead of failing silently, cloud sync during startup now runs in the background to eliminate UI freezes, and fixes for detached custom presets not appearing after download, spurious 401 login errors on slow networks, 409 sync conflicts on startup, and a crash from cloud preset sync racing the GUI at startup.

• Add more logs to track Orca Cloud logout issues by @peachismomo in github.com/OrcaSlicer/OrcaSlicer/pull/13713 ↗ — Added diagnostic logging around cloud logout events to help identify unexpected logouts.

🌊 New Features & Improvements

• Z Anti-Aliasing (ZAA) contouring by @adob in github.com/OrcaSlicer/OrcaSlicer/pull/12736 ↗ with fixes and improvements by @valerii-bokhan, @RF47, and @ianalexis in github.com/OrcaSlicer/OrcaSlicer/pull/13452, ↗ github.com/OrcaSlicer/OrcaSlicer/pull/13508, ↗ github.com/OrcaSlicer/OrcaSlicer/pull/13510, ↗ github.com/OrcaSlicer/OrcaSlicer/pull/13450, ↗ github.com/OrcaSlicer/OrcaSlicer/pull/13766, ↗ and github.com/OrcaSlicer/OrcaSlicer/pull/13446 ↗ — Z Anti-Aliasing (ZAA) reduces visible stair-stepping on curved and sloped top surfaces by raycasting each extrusion point against the original 3D mesh and micro-adjusting the Z height to follow the actual surface geometry. Instead of keeping every move at a single flat Z for the whole layer, OrcaSlicer emits varying Z values inside the affected layer — noticeably smoothing domes, chamfers, and shallow slopes without changing the nominal layer height of the rest of the print. Five new settings are available under Print Settings > Quality (zaaenabled, zaaminz, zaaminimizeperimeterheight, zaadontalternatefilldirection, zaaregiondisable). This is an Expert mode feature currently targeting top-facing curved or sloped surfaces. Wiki ↗