> unfortunately, WebXR restrictions make AR passthrough and the camera feed mutually exclusive
It looks like Chromium-based browsers might be doable?[1][2]
Meta: About a decade ago, I rolled my own WebXR-like stack with passthrough, and played with an XR Powers of Ten zoomer. Here we are years later, and it's apparently still not something which might be deployed. In some sense, we are progressing so sloooowly.
[1] https://caniuse.com/wf-webxr-camera [2] https://immersive-web.github.io/raw-camera-access/
Hmm, interesting! I saw that it's a draft, and didn't investigate further. Maybe it does work indeed on some browsers.
Generally, the compatibility story turned out more fragmented than I expected. Eg, on my phone, Chrome can do AR – but cannot do two camera feeds at once; while Firefox is the exact opposite – no AR but can do both cameras at once, so that you see both front and rear lensed around the black hole properly (in the camera mode).