

Meshroom is FOSS, relatively easy to use and works out of the box. It is industrial quality and is widely used in cinema and untertainment industry. So, I think it’s the go to if you want something robust and usable.
NVidia provide several reasearch software to do Radiance Field stuff on their github: https://github.com/NVlabs. They gives impressive results, but none of them is user friendly. It’s reasearch stuff.
I’m working with RealWear. Not really an AR glass, but interesting experience anyway.
There is no headache or nausea at all. That’s the main point compared to immersive VR. You see the real world, so the brain is not disturbed by screen latency. I once kept it on the head 7 hour a day, 5 days in a row and did’t felt any disconfort. Whereas I cannot keep a VR headset for more than 15min.
My company have an R&D lab in California with any kind of VR and AR devices, but I’m in France 😟.
My 2 cents.