It’s nice to see this addition. I’m not sure if Godot would be better off bridging OpenXR to apple’s ar compositer or do as these PRs implement.

It isn’t much work to bridge from a metal renderer to the ar compositor. There are nice, if under documented c apis for Compositor Services in visionOS. I don’t think this will end up being a heavy maintenance burden, but they should donate some headsets as the second vertex amplification doesn’t run in the simulator. The max threads per thread group also differ. So real hardware is needed to measure performance.

https://developer.apple.com/documentation/compositorservices...