Ribbon World

!screenshot (Image taken with distant horizons (must have "Distance Generation" disabled or it fills in the void chunks))

Simple mod inspired by the "Ribbon World" type in Factorio. Does a few things:

• Removes terrain in the +/- Z direction, limiting the generated terrain to:
  • 384 blocks (24 chunks) wide in the overworld (same as -64 to 320 build height)
  • 256 blocks (16 chunks) wide in the nether/end (same as 0 to 256 build height)
• Creates a 1-chunk wide wall of barrier blocks at the border between terrain and void.
• Stops Nether portals from generating outside of the border in the overworld (shouldn't happen in the nether)
• Stops End gateways from generating outside the border (they just generate at Z = 0)
• Kills any non-player entities outside the border (means shulkers don't stick around in the End)
• Tries to stop players from spawning outside the border (may not work if game cannot find valid spawn inside border, e.g. spawn is an ocean 🤷)