I think there should be a section of this article that talks about the nether. I just used commands in creative mode to teleport to the west boundary of the world, and I saw the diagonally striped wall that I've seen on servers. I went to the nether. There was no boundary wall in the nether, so I went further west by a hundred or so blocks and built a new portal. When I went through the second portal, I was a few hundred blocks north of my original portal despite not travelling north while in the nether.
I also want to know if the nether world boundary is also at +/- 20,999,984, or if it is closer to the origin due to distances being different in the nether than in the overworld. --71.10.178.164 19:52, 13 June 2020 (UTC)