Terrano

Terrano is an Overworld generator for Minecraft 1.21.1 built from the terrain system of TerraForged 0.2.16. It replaces Minecraft's small, rapidly changing landforms with a broader landscape made of continents, islands, plains, valleys, plateaus, mountain ranges, volcanoes, lakes, wetlands, and rivers that continue across long distances.

The aim is not to turn the Overworld into a separate fantasy dimension. A Terrano world is still recognizably Minecraft: players explore familiar biomes, mine the usual ores, enter modern caves and aquifers, and find current structures such as Ancient Cities, Trail Ruins, and Trial Chambers. Terrano changes the shape and arrangement of the land around those systems so the surface feels more connected and deliberate.

A landscape built on a larger scale

Terrano begins with a continent and climate map rather than deciding the shape of each chunk in isolation. Mountainous terrain gathers into ranges, rivers follow valleys toward lakes and oceans, and climate regions give forests, deserts, taigas, savannas, and snowy areas enough room to develop their own character.

The world extends from Y=-64 to Y=319. Below the surface, Minecraft 1.21.1 still provides deepslate, aquifers, caves, and ore distribution. Above it, Terrano adds its own surface treatment, erosion, geological layers, snow, and a large collection of custom trees and mushrooms. The Nether and the End are not replaced.

Choose how the world should feel

Five built-in presets cover different styles of play. Default is the standard balanced choice. Beautiful gives the terrain more presence, Huge Biomes makes climate regions much larger, Lite reduces expensive details for busier servers, and Vanilla-ish keeps Terrano's broad landforms while bringing their proportions and decoration closer to regular Minecraft.

When creating a world, the Customize button opens a focused preset chooser with a preview generated from the current seed. Players who want more control can continue into the full editor, start from any built-in preset, and save their own reusable JSON profile. The chosen settings are stored inside the world, so editing a preset file later does not silently alter an existing save.

Terrano can also place compatible biomes from other mods into suitable parts of its climate and terrain. Optional bridges support biome setups based on TerraBlender, Lithostitched, or standard Overworld biome tags. If no compatible biome mod is installed, this system stays out of the way and native Terrano generation remains unchanged.

Getting started

Terrano 1.x.x requires Minecraft 1.21.1, NeoForge 21.1.235 or newer in the 21.1 branch, and Java 21.

1. Install NeoForge and place terrano-1.x.x.jar in the mods folder.
2. Install the same mod on the server and on every connecting client.
3. Create a new world and select Terrano as its world type.
4. Keep Default, or press Customize to choose another preset.

Terrano has no mandatory library dependency beyond NeoForge. Old TerraForged worlds from Minecraft 1.16.5 cannot be opened directly, although their JSON presets can be imported.

For preset creation, dedicated-server setup, commands, configuration, mod compatibility, updates, and troubleshooting, see the Terrano Wiki. Every JSON field accepted by a custom preset is described in the separate Preset Settings Reference.

Credits and license

Terrano is created by NoN. New Terrano code is distributed under All Rights Reserved. Adapted TerraForged code and resources retain their original MIT license.

Thanks to won_ton_ and the TerraForged contributors for the original project. Terrano's terrain-aware river network draws on the hydrological ideas of plate-local-river-generation, created by Michael K. Davis III. Terrano uses its own Java implementation adapted to the mod's terrain engine rather than bundling the original code.