tinyusdz/doc/composition.md

subLayers

import layer(USD)

inherits

Inherit Prim in the layer

variantSets

Works like switch.

references

load layer(USD) from file(asset)

payloads

delayed version of references

specializes

Something like C++ template specialization. Override existing Prim (Note: over Prim spec cannot be used in same Layer(USD file), but can do it with specializes)

References

https://github.com/ColinKennedy/USD-Cookbook/blob/master/concepts/asset_composition_arcs.md

LIVRPS

• Local: Load subLayer
• Inherit: Resolve inherits
  • Recursively apply LIVRP to target path(no Specializes evaluation)
• Variants: Resolve VariantSets with currently selected Variants
  • Recursively apply LIVRP to target layer(no Specializes evaulation)
• References: Load references USD
  • Recursively aply LIVRP to target layer(no Specializes evaulation)
• Payload: Load payload USD
  • Recursively aply LIVRP to target layer(no Specializes evaulation)
• Specializes: Resolve specializes
  • Recursively aply LIVRPS to target layer(do Specializes evaulation)