>>388482175
>>388481315
Actually I forgot that Facebook/Meta had already talked a bit about working on HDR.
https://www.roadtovr.com/facebook-reality-labs-lanman-spie-xr-2020-varifocal-hdr/2/
So this may be a continuation of that work, which means the paper is probably about improving optics efficiency, with maybe some additional learnings about creating a pipeline for HDR passthrough.