Voxy SeedGen

Fills Voxy's LODs straight from the world seed — a full 2,048 chunk render distance in under a minute

This is an addon for Voxy, so it requires it and doesn't replace it

Measured on Minecraft 1.21.11, 28 threads, structures on

N-sized worldgen, 2,048 chunk radius (Voxy's maximum render distance): 13.2 million chunks in 40 seconds, about 330,000 chunks/s

NOTE: SeedGen is NOT affiliated with Voxy or its creators, it only produces LODs for it

Terrain shape, biomes, surface blocks, trees, foliage, and structures, all worked out from the seed.
N-sized worldgen writes every area at the detail Voxy actually draws it at, by the same rule Voxy's renderer uses, and writes it finer as the player approaches.
Continuous generation starts on joining a world and keeps the radius filled
Overworld, Nether and End.
Explored Areas are saved as normal
Compatible with ALL NOISE BASED TERRAIN GEN MODS and CUSTOM STRUCTURE MODS

Runs automatically. Otherwise, Video Settings > Voxy SeedGen, or:

Generation distance: 16 to 4,096 chunks, 256 by default
Extended distance: Allows rendering up to the world border. LODs beyond 2048 will have lower quality
Continuous: on by default
N-sized worldgen: on by default. Off writes block detail everywhere (slow and inefficient, but neccerary in certain modded scenarios)
Threads: a little under half your CPU threads by default, leaving the rest to the game and to Voxy
Structures: on by default
Trees: trees, and the scattered decoration of the Nether and End
Water features: kelp, ice sheets and icebergs
Debug: progress and a summary in chat, off by default

Singleplayer and LAN worlds you host only, since a multiplayer client doesn't know the server's seed
Areas Voxy already has aren't redrawn, so changed settings only apply to new areas
The Overworld underground is solid stone, without caves or ores

All credit for Voxy of course goes to cortex, its developer

Compatibility