USD: Next Generation 3D Compositing

Universal Scene Description (USD) is a robust, scalable and open-source framework developed by Pixar for packaging, sharing, and manipulating data in 3D computer graphics pipelines.

USD simplifies the creation of intricate scenes by using graphics primitives such as geometries, materials, lights, and cameras arranged in a clear hierarchy. It promotes streamlined collaboration among various software tools employed in visual effects and animations. Furthermore, USD enables seamless data sharing across applications and supports non-destructive editing at any stage of the pipeline, making it an optimal choice for visual effects and animation.

Why Is USD Useful To A Compositor?

The growing industry acceptance of USD suggests that it is a crucial standard for the future of 3D compositing. USD provides a number of features that make it well-suited to 3D compositing tasks:

• Compatibility and Collaboration: Enables smooth data exchange among different tools, encouraging collaborative and efficient workflows in the production pipeline.
• Scalability and Performance: Efficiently handles complex scenes.
• Layered Compositions and Flexibility: Supports independent layer management, fostering flexibility and organization in assembling and editing scenes.
• Non-destructive Editing and Modularity: USD makes it possible to roll back changes and reuse components. This makes it easier to iterate and make creative adjustments throughout the pipeline.
• Advanced Attribute System: Enables complete control and customization using a robust attribute system.
• Open-source Development and Community Engagement: This open-source framework offers continuous improvements and feature additions that are driven by community contributions and feedback.

Classic Nuke 3D vs USD

The 3D system for Nuke has been completely re-architected to deliver improved performance at scale. We chose a USD-based system specifically to cater to the needs of Nuke artists, resulting in a more efficient and high-performing system.

The new USD system offers a number of benefits over the classic system:

• Enhanced Performance: The new system handles larger projects more efficiently.
• Reduced Conversion Delays: Working with the new USD architecture eliminates the need to convert 3D data into Nuke's own format. Instead, you can bring in the USD data and operate on it directly without adding the additional complexity of translation layers on the import.
• USD Version Flexibility: Artists can work with any version of USD, ensuring compatibility and adaptability in various pipeline settings.
• Modern Scene Graph Engine: Nuke has introduced a proper scene graph to ensure you can locate objects and facilitating more controlled 3D scene management.
• Advanced Modifier and Creation Nodes: New nodes allow precise control over specific parts of the scene graph.
• Parallel Release of 3D Systems: The new and classic 3D systems will be available concurrently to avoid disruptions in existing workflows.
• Community-Centric Development: This release marks the start of ongoing developments to enhance Nuke's 3D environment, with a focus on community input and collaboration.