Vertical Spawn!

Random respawns anywhere inside a 3D area - not just on the highest block.

Vanilla random spawning only looks at the surface: players without a spawn point, and everyone hit by /spreadplayers, always land on the highest block. Vertical Spawn adds the missing dimension. Set an area with a min and max Y, and players land at a random safe spot anywhere inside it - caves, overhangs, interiors, lower levels, or the surface too.

Built for Forge 1.20.1

Features

• True 3D random spawn - picks from every safe spot between min and max Y, not just the top block
• Multiple zones - define several named areas, each with its own Y range and ceiling rule, all with an equal chance
• Safe spots only - solid floor, room to stand, no slabs, liquids, fire, cobwebs or magma
• /spreadplayers replacement - same arguments, but uses the whole height range (and your zones)
• Datapack friendly - all commands work in functions and command blocks
• Lightweight - server-side only, no client mod required

Requirements

• Minecraft 1.20.1
• Forge 47.4.10+

Installation

Drop the jar in your server's mods folder and launch.

Server-side mod - players don't need to install anything. Works in single-player too.

Usage

Set the area and turn it on:

/verticalspawn area border 0 120

/verticalspawn enable

That's it. Players now respawn anywhere inside the world border, from Y 0 up to Y 120.

Want spawns only inside certain structures? Add zones instead - each one gets an equal share:

/verticalspawn zone add tower_a -30 -10 -10 10 65 200 true

/verticalspawn zone add tower_b 10 -10 30 10 65 200 true

The true at the end means covered spots only, so nobody spawns on the roof.

Or swap out /spreadplayers:

/verticalspawn spread 0 0 10 80 true @a

Full command list on GitHub.