ModsFinder

CopperWorld

by lanse

CopperWorld turns an entire world into copper through a set of server commands that start with CopperWorld.

FabricServer required, client optionalMIT LicenseOpen source1.21.8

What it does

Copper is applied to the whole world from a command, so terrain is rebuilt in copper blocks rather than natural ones. The mod is a terrain editor branched from the FractalWorld mod and shares similar commands, such as setting a column. Its main gain is loading speed, since the world is rebuilt with a new block palette instead of fractal maps. Only Fabric for 1.21.8 is published, and the server is required while the client is optional. The mod is released under the MIT License and is open source.

Key features

  1. Whole-world copper conversion

    A command converts the entire world's terrain into copper blocks, with a set of example presets.

  2. Command-driven editing

    Every action starts with CopperWorld, and the terrain editor offers commands similar to FractalWorld, such as setting a column.

  3. Adjustable speed

    A CopperWorld Set command lets the operator tune generation speed further, and more presets and commands are planned.

Compatibility

Latest build for each game version and loader.

1.21.81.0.0
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

How it compares

Full comparison

UltraHardcore is a Fabric mod for 1.21 that is server-side only and not open source. Mandatory Copper is also a Fabric mod with a server-required, client-optional environment, released under the MIT License, but it targets 1.21.11. Copper Nugget is a Fabric mod for 1.21.4 that runs on client and server and is open source under the MIT License.

ModLoadersGame versionsEnvironmentUpdated
CopperWorldFabric1.21.8Server required, client optional2025-07-23
UltraHardcoreFabric1.21Server-side only2024-10-01
Mandatory CopperFabric1.21.11Server required, client optional2026-02-18
Copper NuggetFabric1.21.4Client and server2025-01-06

Questions

Does CopperWorld need the client to install it?

No. The server must run the mod, but players can join without installing it, since either side can skip it on the client.

In the catalog

CopperWorld is one of 7,555 Cursed mods on ModsFinder, and one of 4,235 Cursed mods for Fabric. 17,695 mods support Minecraft 1.21.8.

Cursed mods7,555Fabric modsMods for 1.21.817,695

More from lanse

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Fractal World1.20.1 – 1.21.4Bossmode1.20.1 – 1.20.6GreaterHorns1.20.1Blizzard1.20.1Conjoined1.20.1DementiaCraft1.20.1

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What the author says

This mod is very command based. All commands start with /CopperWorld. The terrain editor has branched off my FractalWorld mod, and has a lot of similar commands like setting the column loading speed, just instead of turning the world into a fractal, it maps all of the blocks to a new color pallette! For example…
lanse, on the Modrinth page

Official listing

Owner
lanse
Published
2025-07-23
Updated on Modrinth
2025-07-23
Facts verified
2026-10-15

Tags

CursedWorld generationAdventureGame mechanics
Open on ModrinthCompare