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FWIW this was done in real time 5 years ago, cf “DreamWalker: Substituting Real-World Walking Experiences with a Virtual Reality” by Yang, Holz, Ofek & Wilson for UIST 2019 https://www.microsoft.com/en-us/research/publication/dreamwalker-substituting-real-world-walking-experiences-with-a-virtual-reality/

It was then actual real-time, not a concept through post-proc/VFX thanks to AI🤷‍♂️ https://x.com/NathieVR/status/1848043824251379819

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