OrcaSlicer 2.4.1

What's Changed

This is the OrcaSlicer V2.4.1 release — a maintenance update on top of 2.4.0 with a broad round of profile and preset fixes at its core: it restores filaments that had gone missing or were miscategorized in the Orca Filament Library and the filament selection dialog, de-duplicates profile setting IDs, corrects ambiguous AMS filament matches, and improves how renamed and inherited presets are resolved.

Other changes include a native Windows ARM64 build, a new minimal chamber temperature field, and a reworked skirt and brim generator (fixing a 2.4.0 regression that re-printed the skirt during per-object/sequential printing), alongside fixes for fuzzy skin, AMS sync ordering, CrealityPrint hosts, and Linux Wayland rendering. It also adds Snapmaker U1 nozzle profiles, Elegoo Centauri 2 support, and a refreshed translation catalog.

🌊 New Features & Improvements

• Native Windows ARM64 build (Snapdragon X Elite) by @abehrman in 14059 ↗, brought up to date and merged by @SoftFever in 14381 ↗ — Adds a green, native Windows-on-ARM build (not x64 under emulation) for Snapdragon X Elite and other Windows ARM64 devices, folded into the standard Windows build matrix. It ships full feature parity — STEP/STP import, SVG→3D, and text emboss all build and work on ARM64 — with the x64/x86 build paths unchanged. This is a build/CI addition; wiring ARM64 into the official signed-release pipeline (code signing, installer) is a follow-up. The original work and authorship are @abehrman's (#14059); #14381 simply brings that branch up to date with main. With the new ARM64 builds, the Windows x64 installer and portable downloads now carry an _x64 suffix in their filenames to distinguish them from the ARM64 ones.

• Minimal chamber temperature field by @igiannakas in 14340 ↗ — Adds a per-filament "Minimal" chamber temperature alongside the existing value (now labelled "Target") in the filament settings, exposed to print-start macros as the chamberminimaltemperature variable. This lets a start macro begin printing once the chamber reaches a threshold — for example, start at 50 °C while the chamber keeps heating toward a 60 °C target. The value is validated against the target (it warns and clamps if set higher) and is not emitted via M141/M191; it defaults to zero for existing profiles.

Minimal and Target chamber temperature fields

• Skirt and brim generation rework by @kisslorand in 14333 ↗ — Reworks skirt and brim generation into a single, shared flow and fixes a regression introduced by the 2.4.0 skirt overhaul affecting per-object and sequential (By Object) printing: with a skirt enabled, the skirt could be re-printed before each object — running the nozzle back over it, or even knocking already-printed parts off the plate — and the object print order was not respected. Skirts are now tracked per group and per print height so each one prints exactly once. In By Layer mode with per-object skirts, the order is now skirt → brim → object for each object (previously all skirts printed first), and brims print together with the object or group they belong to while Combine brims still merges touching brims. Draft shields are generated through the same logic, fixing cases where a draft shield failed to generate at Skirt height = 0 or overlapped the brim. Unsafe By Object configurations that would need a shared multi-layer skirt or draft shield are now rejected with a clear slicing error. Fixes #14319 and #14366.

| Before | After | | | |

| Draft shield at Skirt height = 0 — Before | After | | | |

• Warning dialog about the profile-sync change by @SoftFever in 14377 ↗ — Adds a one-time warning dialog explaining the profile-sync behavior change introduced in 2.4.0, so users understand how their profiles are synced before it affects them.

Profile sync change warning dialog

• Specify the plate index for 3MF uploads by @SoftFever in 14404 ↗ — When sending a job as a packaged .gcode.3mf, the upload now names which plate to print. Because the G-code inside a .gcode.3mf is index-coded and a bundle can carry several plates, the OctoPrint and Moonraker hosts now forward a plateindex field so the correct plate prints; servers that don't use it simply ignore the field, leaving the plain G-code path unchanged.

🛠️ Bug Fixes

Profiles & presets

• Fix filament inheritance issues in Custom Printer Creation by @yw4z and @SoftFever in 12060 ↗ — Creating a printer for several vendors (Chuanying, Lulzbot, MagicMaker, Snapmaker, Sovol, TwoTrees, Z-Bolt, and some Bambu Lab presets) could fail because filaments that inherit from the Orca Filament Library weren't found while loading those vendors' profiles. The library is now searched correctly, so these profiles load and the printers can be created; filaments can also be imported from the Orca Filament Library to cut down on duplicates. Fixes #11704.

| Before | After | | | |