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Information about USDZ from WWDC 2024

Sessions Mentioned:

1. Optimize your 3D assets for spatial computing
2. What’s new in USD and MaterialX
3. Explore object tracking for visionOS

Key Points:

1. USDZ Overview:

   • USDZ is a zip format that packages all dependencies for an asset, such as textures, into an internal file structure. This makes it great for publishing and distributing assets. However, they can't be edited without unzipping. (Optimize your 3D assets for spatial computing)

2. Usage in Reality Composer Pro:

   • When exporting assets, you can choose different USD file types. USDZ is particularly useful for AR assets due to its packaging capabilities. (Optimize your 3D assets for spatial computing)

3. Tools and Utilities:

   • Apple provides several tools for working with USDZ files, including USD zip for creating portable USDZ packages and USD crush for compressing USDZ files. (What’s new in USD and MaterialX)

4. Object Tracking:

   • For object tracking in visionOS, USDZ files are used to train machine learning models. The assets should be as photorealistic as possible to ensure the best tracking quality. (Explore object tracking for visionOS)

5. Integration with CreateML:

   • CreateML can be used to train models with USDZ files. You can drag and drop USDZ files into the 3D viewport for training and verification. (Explore object tracking for visionOS)

6. Variants in USD:

   • USD supports multiple representations of an object using a feature called variance. Quicklook now supports switching between variants interactively, and RealityKit API also supports specifying variants when loading a USD file. (What’s new in USD and MaterialX)

Chapter Markers for Detailed Exploration:

• Optimize your 3D assets for spatial computing

  • 0: Introduction
  • 65: Before you begin
  • 141: Polygon count
  • 179: Export from DCCs
  • 385: Efficient texture use
  • 787: Optimizing materials
  • 907: Sky dome setup
  • 963: Image-based lighting

• What’s new in USD and MaterialX

  • 0: Introduction
  • 43: Strong foundation
  • 151: USD and MaterialX in RealityKit
  • 280: Creative tooling

• Explore object tracking for visionOS

  • 0: Introduction
  • 307: Create reference object
  • 568: Anchor virtual content

Feel free to explore these sessions for more detailed information on USDZ and its applications!