Glossary

USDZ

Apple's packaged USD format for AR, which opens in AR Quick Look on iPhone and iPad.

USDZ is an uncompressed zip package around Pixar's Universal Scene Description (USD) that holds geometry, PBR materials and textures in one file. Apple uses it for AR Quick Look: tap a USDZ file in Safari, Files or Messages on an iPhone or iPad, and the model appears in your room. Outside Apple's ecosystem, Blender and other USD-capable tools open it, but game engines rarely use it as an import format. On Grab3D, every model except the rigged variants is offered as USDZ, exported from the same master as the GLB and in real-world meters, so it appears at true size in AR. Mind the file size: Lightweight USDZ files are under 2 MB in the median, High Detail ones around 40 MB.