Ribbon World

(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 🤷)