What's New in Blender 5.1

Blender 5.1 continues the momentum of 5.0, delivering performance improvements, new Geometry Nodes capabilities, EEVEE refinements, and workflow polish across the board.

Geometry Nodes — Bundles and Closures

One of the most significant technical additions in Blender 5.x is the introduction of Bundles and Closures in Geometry Nodes. This enables new programming patterns in the node graph — artists can now pass sets of values (bundles) and reusable node logic (closures) between node groups, enabling far more modular and maintainable procedural setups.

This is a fundamental change to how complex Geometry Nodes setups are structured, moving closer to proper functional programming patterns without requiring Python.

EEVEE Next — Continued Improvements

EEVEE Next — the completely rewritten real-time renderer introduced in Blender 4.2 — receives continued refinements in 5.1:

• Improved volumetric rendering quality and performance
• Better screen-space reflections for architectural visualization
• More accurate shadow rendering in large scenes
• Improved subsurface scattering for skin and organic materials

Cycles — GPU Rendering Performance

Blender 5.1 brings measurable performance improvements to Cycles GPU rendering, particularly on NVIDIA RTX hardware using OptiX. Benchmarks show 5–15% faster render times on complex scenes compared to 5.0, primarily from improved BVH traversal and better light tree sampling.

Sculpting Improvements

The sculpting tools in Blender 5.1 receive several quality-of-life improvements:

• Improved brush stroke smoothing at high pen pressure
• Better multires subdivision performance on large meshes
• New cloth brush improvements for fabric-like sculpting
• Improved face sets workflow

Animation — Graph Editor Updates

The animation graph editor receives several workflow improvements in 5.1, making it easier to work with complex animation curves:

• Improved keyframe interpolation handles
• Better channel filtering for complex rigs
• New bake options for simulation outputs

USD Support Improvements

Universal Scene Description (USD) support continues to improve in 5.1, with better round-tripping of materials, improved camera export, and more reliable import of complex hierarchies. This makes Blender more viable as part of multi-application pipelines used in film and game production.

Python API Changes in Blender 5.1

Several Python API additions in 5.1 support the new Geometry Nodes features, including new node socket types for bundles and closures. Add-on developers should review the API changelog for deprecation notices.

Blender 5.1 vs 5.0 — What Changed?

Area	5.0	5.1
Geometry Nodes	Volume grids	+ Bundles & Closures
Cycles GPU	Baseline 5.x	5–15% faster (RTX)
EEVEE	EEVEE Next stable	Volume + shadow improvements
USD	Basic import/export	Improved materials, cameras
Sculpting	Baseline	Brush + multires improvements