CityWorld ReForged

CityWorld - reforged for NeoForge

Drop into an endless, hand-crafted-feeling city — procedurally generated, seed-deterministic, and packed with detail: named streets, furnished buildings, roundabouts, factories, farms, mines, sewers, and wild nature in between. This is a full NeoForge port of the classic Bukkit/Spigot plugin CityWorld, rebuilt from the ground up for modern Minecraft — same generator brain, same GPL-3 license, now a world type you can pick from the create-world screen.

Battle-tested across 135 worlds and 3.2 million generated chunks — over 830 km² of procedurally generated city, more ground than New York City covers.

What you get

Pick CityWorld as your world type and you land in a living city:

• Roads and infrastructure — named streets with real street signs, sidewalks, roundabouts (with statues), bridges, tunnels through mountains, and the odd hidden lift shaft in a 4-way crossing below.
• Buildings, furnished — houses through highrises, all fully furnished inside: kitchens, living rooms, bedrooms, libraries with chiseled bookshelves, offices, shops with the right job-site block for their trade (cartography tables, fletching benches, looms, smokers…) and a hanging sign out front.
• Districts — municipal civic centres, industrial factories/warehouses (with bunkers underneath), farms with animals and crops, and parks with zoos and glass biodomes.
• Underground — mine networks with copper-age fittings, ore veins that get richer with depth, cave-spider nests, hanging lanterns, and vertical lift shafts; wet sewers; bunkers and basements with loot and mob spawners.
• Nature and caves — mountains, seas with beaches, and (in MODERN/APOCALYPSE) wandering, branching cave tunnels like vanilla's, rare lush cave patches (moss, glow-berry vines, dripleaf, pools with axolotls/frogs/tropical fish, surface azaleas), and basalt-lined lava pools instead of a flat lava sea.
• Inhabitants — named villagers employed at their shop's actual trade, animals in the fields, fish in the sea, hostiles lurking in mines, sewers and the dark.
• Set-pieces — castles, radio towers, oil platforms, flying saucers, hot-air balloons, campgrounds — scattered rare landmarks, findable with /cityfind.
• Custom schematics — a bundled catalog of classic buildings, plus drop your own (.schematic/.schem/.litematic/.nbt) into a config folder and turn them loose in the city.

World styles

Thirteen selectable styles, each its own world type (cityworld:<style>) or a click away on the Customize screen:

Configure everything

CityWorld has around 100 tunable settings — which features generate, spawn/treasure odds, terrain toggles, city radius, decay intensity, even the villager-name and mob lists. Because settings are per-world, they ship as a datapack, not a global config: edit them by hand, or use the in-game Customize screen and export what you like with /cityexport.

→ Full settings reference, example datapacks, and guides (a gentler apocalypse, sparse cities, custom villager names, taller skyscrapers, and more): sablecraft.co.uk/cityworld-reforged

Your other mods' blocks build cities too

CityWorld's building palettes are block tags, not a fixed list. A mod that tags its blocks the normal way — planks in #minecraft:planks, stone in #c:stones — starts appearing in cities the moment you install it, with no patch and no compatibility pack. The odds stay put as the palette widens, so a heavily modded world gets more variety, not more wooden houses. For mods that don't tag their blocks, or to put a mod's blocks somewhere they wouldn't naturally go, a small datapack extends any palette directly.

Commands

/cityinfo tells you what's under your feet; /cityfind//cityfind lot//cwlocate track down a specific building, landmark or biome; /cityschem pastes catalog buildings by hand; /cityexport bottles a world's settings to hand to a server.

→ Every command with usage examples: sablecraft.co.uk/cityworld-reforged

Requirements

CityWorld runs on three Minecraft versions. Download the file for yours — the Minecraft version is in the filename, so there is no guessing which is which.

A given seed builds the same city on all three. The layout — terrain, roads, districts, which building stands where — is identical across versions; only the materials shift slightly, because newer Minecraft versions bring new blocks into the building palettes. Every version is verified automatically before release, generating a real world and checking the cities, signs and biomes come out right.

Credits and licence

CityWorld is licensed under GPL-3.0-only.

• Original CityWorld Bukkit plugin by DaddyChurchill — the original author knows about this port and has approved it.
• This NeoForge port by Sablednah, continuing under GPL-3 as a derivative work.
• Terrain noise vendored from Bukkit (GPL-3), in turn derived from Stefan Gustavson's public-domain simplex work.

Full docs, screenshots and guides: sablecraft.co.uk/cityworld-reforged Source, issue tracker and full port history: see the GitHub repository.