I'm looking for documentation/guidance on USDZ and scene model sizes. My focus is on RealityKit-based apps.
I found the 2018 WWDC presentation
Integrating Apps and Content with AR Quick Look
which mentions a rule of thumb for a USDZ model of:
- 100K polygons
- One set of 2048x2048 textures
- 10 seconds of animations
Are these number still recommended in 2021?
Are these numbers just for Quicklook, or do they apply to RealityKit-based apps too?
If a RealityKit scene loads several USDZ models, should the cumulative number of polygons across all models be 100K, or is the 100K number on a per-model basis?
The talk mentioned AR Quicklook will dynamically downsample textures for devices with less memory. Does RealityKit do this as well?
If so, can I error on providing a larger texture (e.g., 4096 x 4096) and trust RealityKit to downsample as appropriate for me?
(I am hoping there is some documentation covering questions like this)