World Height: Y320+

A Hytale server early plugin that removes the hardcoded 320-block world height limit.

What it does

Hytale's server has the world height hardcoded at 320 blocks in 43 classes. This plugin rewrites every height constant at class load time using ASM bytecode transformation, extending worlds to 32,736 blocks tall by default (the engine maximum).

Patched systems

Chunk storage — section arrays resized, constant fields updated, safe deserialization
Collision & physics — mobs collide with blocks above Y=320, ground detection fix
World generation — terrain generates up to the new height limit
NPC / AI — NPCs see and navigate blocks at any height
Spawning — entities spawn correctly at any height
Block interactions — placement, targeting, farming all work
Network — client receives the correct world height
Gameplay — fire, farming, weather, portals work at full height

Installation

Download the jar from the Files tab
Copy to your server's earlyplugins/ folder
Open your server launch script and add --accept-early-plugins:
- Linux (start.sh): find the DEFAULT_ARGS= line and append the argument: DEFAULT_ARGS="--assets ../Assets.zip --backup --backup-dir backups --backup-frequency 30 --accept-early-plugins"
- Windows (start.bat): find the set DEFAULT_ARGS= line and append: set DEFAULT_ARGS=--assets ../Assets.zip --backup --backup-dir backups --backup-frequency 30 --accept-early-plugins
Start the server

Configuration

Default: 32,736 blocks (engine maximum). To lower, set a JVM property:

-Dhytale.worldHeight=1024

Constraints: Must be > 320, multiple of 32, max 32,736.