Core Concepts
Book of USD: An introduction to core USD concepts from Remedy.
USD Basics for Houdini Solaris: An introduction to USD from SideFX.
Understand USD Fundamentals (video): An introduction to USD fundamentals from Apple.
Universal Scene Description (OpenUSD) for Developers (video series): Introduces 4 key features of OpenUSD and breaks them down over the course of the video series.
Working with USD (video): An introduction to USD with Apple platforms and frameworks, from Apple.
What is USD (video): An introduction to USD concepts from Robin-Yann Storm. Assets used in the video are available here.
Last Mile vs Interchange formats: A taxonomy of 3d file formats based on the intent of the format.
Misc Reference
Pixar Resources
openusd.org The official website
The History of USD, by F. Sebastian Grassia and George Elkoura
Introductory Videos Several video presentations by Pixar
UsdSkel All about skinning schemas for USD
USD based pipelines 2016 presentation on Pixar's use of USD in the pipeline
Simple Shading In USD Pixar's docs for USD preview material
Using USD with Apple's technologies WWDC 2017 presentation
USD at UTS Animal Logic Academy video presentations
USD Cookbook Colin Kennedy's USD code and asset samples
USD Survival Guide (GitHub): A practical and production oriented onboarding guide for pipeline TDs/software developers, that covers everything you need to switch your pipeline to USD.
Luma USD Integration Brief notes on Luma's pipeline
Unity USD SDK
Unity USD SDK Presentation about the Unity USD SDK
Unity USD SDK Design notes on the Unity USD SDK's API
Unity USD SDK Details on using the Unity USD SDK
Autodesk resources
Autodesk landing page for USD (includes recording of past presentations)
Experimenting with USD in Game Pipelines Autodesk Developer Summit, GDC 2022
nVidia Resources
GPU Technology Conference (GTC - free, registration required)
Course: Getting Started with USD for Collaborative 3D Workflows
GTC 2022 Sessions (free, registration required)
usdview documentation by nVidia at the Omniverse site
Useful USD code patterns in the Omniverse documentation
SIGGRAPH
Building the Open Metaverse SIGGRAPH 2022 (slides here)
License: CC BY 4.0, Copyright Contributors to the ASWF USD working group.