Lychee Slicer 7.6.6 – Professional 3D Printing Preparation Software for Resin and FDM Printers

Lychee Slicer is one of the most widely used slicing applications in the resin 3D printing world, known for its compatibility with over 750 printers, extensive resin profiles, and active community support. Version 7.6.6 is a minor update released on June 29, 2026, focused on project file integrity and stability.

Primary Users

Lychee Slicer 7.6.6 is designed for 3D printing enthusiasts, makers, product designers, jewelers, dental technicians, and professional prototyping engineers who need reliable, feature-rich software to prepare 3D models for printing. It serves professionals and hobbyists who:

  • Prepare and slice 3D models for resin (SLA/DLP/MSLA) and filament (FDM) printers

  • Generate support structures automatically or manually for complex models

  • Optimize print success by detecting and preventing issues like suction cups and resin traps

  • Manage multi-plate workflows for batch printing and complex projects

The software is trusted by the resin 3D printing community for its intuitive interface, extensive printer compatibility, and advanced failure-prevention features 

Key Features & Capabilities

Core Slicing and Preparation Tools

  • Intuitive Interface: Designed for users of all experience levels, with automatic tools guiding beginners and advanced features for experienced makers 

  • Real-Time Preview: Preview 3D prints directly on-screen with automatic scaling to real-world dimensions 

  • One-Click Hollowing: Reduce resin waste and manage internal structures with automated hollowing 

Support Structure Management

  • Automatic Support Generation: Generate efficient support structures for both simple and complex models with a single click 

  • Manual Support Tools: Add, edit, and customize supports manually for precise control

  • Advanced Support Presets: Create custom support types and assign them to overhang settings; presets now fully export and import with their custom support types 

Hollowing Technology (Voxels Hollowing 3D)

Introduced in version 7.6.0, this advanced hollowing system uses voxelization for superior interior control :

  • Automatic Resin Trap Detection: Identifies interior pockets that would trap uncured resin

  • Suction Cup Detector: Scans models to find areas that could cause vacuum-related print failures

  • Visual Feedback: Shows problematic areas in the voxel view before printing

  • One-Click Automatic Fixes: Auto-fill interior resin traps and suction cups

  • Add Infill System: Generate internal support structures within hollow cavities

Multiplate Management

Introduced in version 7.4.2, Multiplate allows users to manage multiple build plates within a single project :

  • Add up to 49 plates for batch printing and complex projects

  • Quick Object Management: Use Ctrl + Shift + A to select all objects on the active plate

  • Copy and Paste objects between plates using standard keyboard shortcuts (Ctrl + C / Ctrl + V) 

Printer and Resin Compatibility

  • 750+ Supported Printers: Extensive compatibility with major brands including Elegoo, Anycubic, Phrozen, and Formlabs 

  • Community Resin Profiles: Access pre-configured settings for various printer and resin combinations shared by the community 

  • New Printer Support: Version 7.6.6 adds corrected screen dimensions for the Phrozen Sonic Mighty Revo 16K 

File Integrity Protection (New in 7.6.6)

  • File Integrity Check on Save: Verifies that files are written correctly, warning immediately if something goes wrong 

  • Automatic Recovery of Corrupted Files: Automatically recovers .lys and .lyt files from the most recent valid auto-save 

  • Manual Backup Selection: When automatic recovery isn’t possible, users can browse and restore from available backups 

Lychee Library Integration

  • Access a wide resource of high-quality, ready-to-print 3D models 

  • Download presupported models from top creators worldwide 

  • Cults3D integration: Open models found on Cults directly in Lychee Slicer 

What’s New in Lychee Slicer 7.6.6

Version 7.6.6 is a minor stability update released on June 29, 2026, focusing on file integrity, bug fixes, and printer compatibility :

New Features

  • Automatic Recovery of Corrupted Files: If a .lys or .lyt file is corrupted, Lychee Slicer now recovers it automatically from the most recent valid auto-save. A dedicated window lets users browse available backups and choose one to restore .

  • File Integrity Check on Save: Verifies that files are written correctly every time a save operation occurs. Users are warned immediately if something goes wrong and prompted to try again .

Fixed Issues

  • File Opening & Loading: Fixed several cases where files would fail to open or stay stuck on the loading screen .

  • Phrozen Sonic Mighty Revo 16K: Corrected screen dimensions so slices map accurately to the printer’s display .

  • Auto-Support Stability: Previous versions (7.6.4) addressed crashes, freezes, and collision detection issues in Auto-Support generation .

  • Holes Tool: Fixed holes becoming invalid after mirroring models