A stage has a root.

USD is a composition system; USDZ is an ordered, uncompressed archive. Compare standalone USDA, an aligned in-memory USDZ with an embedded layer, and the official textured asset while keeping parser limits visible.

loader / mode

—

request

—

nodes / meshes

—

layers / refs

—

materials / textures

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vertices / triangles

—

scale / axis

—

sample

NOT RUN

LOADING MANAGER / WAITINGARCHIVE / —

USDLoader parses a Group synchronously; texture readiness and application-owned disposal are separate boundaries. USDZLoader is deprecated in favor of USDLoader.

Sources: USDLoader · USDZLoader · official example · USDZ specification