Alliance for OpenUSD
The Alliance for OpenUSD (AOUSD) is a Linux Foundation project dedicated to promoting interoperability of 3D content through Universal Scene Description (OpenUSD). Founded by Pixar, Adobe, Apple, Autodesk, and NVIDIA, AOUSD standardizes 3D content ecosystems for film, gaming, architecture, industrial design, and the metaverse. OpenUSD provides a high-performance extensible software platform for collaboratively constructing animated 3D scenes with schemas for geometry, shading, lighting, physics, and volume rendering.
APIs
OpenUSD C++ API
The OpenUSD C++ API is the primary interface for working with Universal Scene Description data. Provides access to USD core (scene composition and asset management), UsdImaging ...
OpenUSD Python Bindings
OpenUSD provides comprehensive Python bindings for all major C++ modules, enabling scripting and pipeline integration in Python-based DCC workflows. Python bindings cover the fu...
Features
USD's composition arcs (references, payloads, variants, instancing, and specializes) enable non-destructive scene assembly from multiple asset layers with override workflows.
OpenUSD's schema system allows studios and tool vendors to extend the core specification with domain-specific schemas for physics, simulation, characters, and environments.
The Hydra rendering delegate architecture enables pluggable render backends including Storm (OpenGL), Arnold, RenderMan, and others.
OpenUSD supports human-readable ASCII (.usda), binary (.usdb), and packaged archive (.usdz) file formats for different use cases.
The ArResolver system enables customizable asset path resolution for integrating USD with studio asset management systems.
Use Cases
Exchange complex animated scenes between DCC tools (Maya, Houdini, Blender, Katana) and render farms using OpenUSD as the common format.
Use OpenUSD as an interchange format between game engines like Unreal Engine and Unity and DCC content creation tools.
Share 3D building models, materials, and lighting between architectural design tools and real-time visualization platforms.
Enable interoperability of 3D assets and scenes across XR platforms, spatial computing devices, and virtual world applications.
Represent complex mechanical assemblies and simulation environments for industrial digital twin applications using USD schemas.
Integrations
Import and export USD files via Autodesk's official USD plugins for Maya and 3ds Max, enabling OpenUSD-based pipelines.
Native USD integration in Houdini via LOPs (Layout Object Primitives) for creating and editing USD scenes and assets.
Apple's spatial computing tools use .usdz as the primary format for augmented reality and visionOS content.
NVIDIA Omniverse is built on OpenUSD, using it as the foundation for collaborative 3D design and industrial digital twin workflows.
RenderMan natively reads USD scenes, making it the primary production renderer for USD-based feature film pipelines.