>>373162629
I have a 1:1 scale replica of my irl room that I use as a homeworld in VRC. My idea is to grab my irl position from SteamVR then use OSC to write the position data invisibly somewhere on my avatar. Then, when I spawn into the world I'll have the world automatically readjust my position so that the world my irl room are always in alignment. 

I haven't looked into Udon at all before but I remember the 9/11 event pass thing so it's got to be possible for a VRC world to grab data from avatars.