USDZ is Apple's packaged version of Pixar's Universal Scene Description. It is what iPhone and iPad use for AR Quick Look, and what Reality Composer and Vision Pro apps load.
Full name
Universal Scene Description, zipped
Type
3D scene (meshes, materials)
Used in
iPhone and iPad AR Quick Look, Reality Composer, Vision Pro, Blender, Omniverse
Strength
The format for augmented reality on Apple devices.
IGES stores exact surfaces; USDZ needs triangles. We mesh each surface with a deviation of 0.05% of the part's size, which keeps holes and fillets smooth for printing and rendering.
USDZ is written in metres, so a 60 mm part shows as 6 cm in AR, exactly its real size.