USDZ
Apple's 3D file format, required for AR Quick Look on iPhone and iPad.
USDZ is a packaged form of Pixar's Universal Scene Description, adopted by Apple as the format for AR on iOS. When a shopper on an iPhone taps View in AR, the page hands the phone a USDZ file and AR Quick Look opens it in the room.
It carries the same content as a GLB, geometry, materials and textures, but the two are not interchangeable, so any product that should work in AR on both platforms needs both files. Our free 3D model checker opens a USDZ and checks that it is built the way AR on iPhone expects. Pipelines export them from one source model so they never disagree about size or colour.
A USDZ can also carry a price and a buy button through Apple Pay, which few retailers use but which exists.
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