OrcaSlicer/RELEASE_NOTES_v0.9.3.md

Snapmaker Orca Full Spectrum v0.9.3 (Pre-release)

Mixed-filament reliability, Local-Z dithering fixes, and fork-safe CI/CD. Based on Snapmaker Orca v2.2.4.

Highlights

Local-Z Dithering Fixes

• Fixed prime tower degradation during Local-Z dithering by directly switching extruders instead of replaying full tool change templates.
• Improved starting component logic for alternating layers so height adjustments are computed from the correct pass sequence.
• Updated tooltip to clearly explain variable layer height blending with concrete examples (e.g. a 66/33 blend at 0.12 mm prints as 0.08 mm + 0.04 mm layers).

Stable Mixed Filament Identity

• Introduced stable_id for mixed filament entries, giving each entry a persistent identity that survives additions, deletions, and reordering.
• Custom GCode tool changes now reference filament IDs instead of extruder IDs, preventing misrouted tool changes when mixed filaments are modified.
• Stable ID allocation and normalization ensures consistent behavior across project save/load cycles.

Mixed Filament 3MF and GUI Improvements

• Added functions to compute physical filament count and maximum supported filament ID from project configuration.
• GUI now displays total filament counts including mixed filaments in object list and object table.
• Streamlined color assignment and naming for both physical and mixed filaments during initialization.
• Canvas colors now refresh immediately when mixed filaments are modified.

ObjColorPanel Filament Mapping

• Fixed filament ID assignment during color updates by introducing a mapping mechanism for appended filament IDs.
• Improved filament ID resolution in approximate-match and default-strategy code paths.

Network Discovery Stability

• Hardened UdpSocket (mDNS/Bonjour) with a socket quarantine mechanism that centralizes error handling for setup, send, and receive operations.
• Added a cancel method and m_socket_usable flag to prevent operations on broken sockets, fixing crashes on systems where mDNS discovery fails.

Bug Fixes

• Fixed MixedFilamentConfigPanel summary handling to avoid empty-string edge cases in preview data.
• Fixed instance_shift type to Vec3d for correct object pasting behavior in the Selection class.
• Replaced wxEmptyString with wxString() across Plater to prevent subtle initialization issues.

Tests

• Added unit tests for custom GCode tool change handling with mixed filament configurations.
• Added unit tests for stable ID remapping in mixed filament scenarios.

Important Notes

• Experimental build with limited testing.
• macOS builds from this fork are unsigned and not notarized. macOS Gatekeeper may warn or block the app; use right-click > Open or allow it in System Settings > Privacy & Security.
• Use at your own risk.

Credits

• FilamentMixer color blending integration is powered by FilamentMixer by justinh-rahb.
• Library: https://github.com/justinh-rahb/filament-mixer