crosstech-impl-speckle-blender

Quick Reference

Technology Boundary

Aspect	Side A: Speckle	Side B: Blender
Data model	Base object graph (hash-based, immutable)	bpy.data collections (mutable, ID blocks)
Geometry	Mesh, Curve, Polycurve, Point, NURBS	Mesh, Bezier Curve, NURBS Curve, Empty
Materials	RenderMaterial (diffuse, opacity, metalness, roughness)	Principled BSDF node tree (full PBR)
Hierarchy	Collection with `elements` list	bpy.data.collections with linked objects
Units	String property on Base (`mm`, `m`, `cm`)	Scene unit system (`bpy.context.scene.unit_settings`)
Storage	Server, SQLite cache, Memory transport	.blend file (binary)
Versions	Speckle Server 2.x / 3.x, SpecklePy 2.x	Blender 3.x / 4.x

The Bridge: Speckle Blender Connector

The Speckle Blender connector is a Blender add-on that converts between Speckle Base objects and Blender data blocks. It uses SpecklePy internally for transport and serialization.