[Ono-Sendai]

I'm building something similar for metaverses, although with less emphasis on VR currently. See https://substrata.info/about_substrata

Currently it's a relatively simple bidirectional protocol over TLS. It's not fully documented yet but you can get an idea of it by looking at an example bot client in python: https://github.com/glaretechnologies/substrata-example-bot-p...