3MF Import Export v2.7.2 for Blender

This add-on handles geometry, materials, textures, metadata, triangle sets, multi-color slicer-style paint workflows, slicer profile round-tripping, Orca/Bambu modifier parts, and spec-compliant 3MF packaging.

Core 3MF Engine
Full support for 3MF Core Specification v1.4.0 import and export
Correct ZIP package structure
Proper handling of units, build items, object hierarchies, and resources
Recovery-oriented parsing for imperfect or partially invalid files
Non-destructive handling of unknown or vendor-specific metadata

Geometry & Scene Handling
Multi-object and multiple build item support
Components extension fully supported
Blender linked duplicates (Alt+D) export as shared components
Re-import restores linked duplicates correctly
Trianglesets extension mapped to Blender Face Sets
Visualization and remapping supported
Optional modifier application on export
Selection-only and hidden-object export options (with clear warnings)
Configurable coordinate precision

Materials & PBR Support
Full Base Materials (basematerials) extension support
Full PBR Materials extension support
Metallic, specular, and translucent workflows
Textured PBR maps (base color, roughness, metallic) embedded and restored
Materials mapped to Blender Principled BSDF nodes
Face-level color preservation via Blender materials
Stable round-tripping across import/export cycles
Smart material reuse on re-import to reduce duplication

Multi-Color / MMU Authoring Workflow
Import and edit slicer multi-material paint data directly in Blender
Automatic UV map generation for objects lacking proper mapping
Built-in painting tools for filament assignment
User-defined filament count and color selection
Bake textures, PBR materials, or procedural shaders into discrete filament colors
HSL conversion and quantization to a user-defined palette
Export slicer-ready triangle data compatible with multi-material workflows

Slicer Compatibility
Supports slicer project-style 3MF files and real-world production workflows.

Orca Slicer / Bambu Studio
Full round-trip support
Multi-color paint zones preserved
Filament colors read from and written to slicer metadata
Production Extension multi-file project structure supported
Built-in Bambu Lab A1 project template
Import printer profiles from slicer files for export targeting

PrusaSlicer / SuperSlicer
Multi-material zones imported and preserved
Compatible export for painted multi-material workflows
Graceful handling of filament index–based color systems

Workflow & Usability
Drag-and-drop .3mf files directly into Blender’s viewport
Flexible import placement options (original position, world origin, 3D cursor)
Export option presets and user preferences
Metadata panel for viewing, editing, and adding metadata
Embedded viewport thumbnail included in exported 3MF files
Clear progress and status reporting designed for readability

Quality & Maintenance
600+ automated tests covering core features and workflows
Continuous integration validation
Public Python API for scripting and automation via CLI or other add-ons
Sphinx-generated API documentation
Actively maintained and modern Blender (4.2+/5.0+) compatible

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