Larion overhauls the overworld generation in Minecraft by drastically altering terrain shapes and biome placement.

The main characteristics are more mountainous terrain, very different biome distribution and many landmasses separated by a vast ocean.

In contrast to many of the popular terrain generation datapacks, Larion is not that far from vanilla Minecraft in scale and does not aim for realism, instead focusing on fantasy-inspired worlds and being small-scale enough to be interesting to explore in survival mode.

The biomes themselves are not altered at all, making Larion fully compatible with most biome overhauls. See below for a list of compability notes and potential solutions.

If you want a limited world size, check out the Disc World add-on datapack!

Please note that the mod is still in active development, future updates are nearly guaranteed to change how the world is generated. I would suggest not updating the mod on existing worlds unless your are okay with weird chunk borders.

Features

• The world is split into landmasses of varying sizes with plenty of islands inbetween.
• Temperature changes as you move north or south (z-axis).
  • If you travel far enough, it wraps back around.
  • Travelling east or west lets you stay in roughly the same temperature.
  • Tropical and subtropical temperature zones have been swapped so that jungle/savanna generates within deserts. (This is to closer match Earth's actual "biome layout" around the equator)
• Mountains are a more prominent terrian feature, forming massive ranges and often being broader and taller than vanilla.
• World height is increased from 384 to 512 to allow for taller mountains and deeper caves
  • Build height limit is 384, lowest point is -128.
• Long, winding rivers that carve though terrain.
  • Sometimes rivers form strange "knots" that look like lakes.
  • Large lava rivers also flow near the bedrock layer..
• Swamps and windswept terrain are somewhat more common and often appear in oblong patches instead of blobs.
• Mushroom islands are more common, smaller and oddly shaped.
• Numerous smaller tweaks!

Known issues

• Some seeds will spawn you in water or on a tiny island in the middle of nowhere. If you want a bit more predictability when creating a world, I would recommend using World Preview.
• World generation is not as fast as before (roughly 30% slower in my experience) because the new density functions are much more complex and the generated terrain is "taller". By using these Fabric mods you can counterbalance the slowness:
  • C2ME (Biggest performance boost, but can be unstable)
  • Noisium
  • Faster Random
  • FerriteCore

List of compability notes with other worldgen datapacks/mods

Geophilic

100% compatible.

Arboria

100% compatible.

William Wyther's Overhauled Overworld

99% compatible.

So far this is my favorite worldgen mod to use with Larion, they go together perfectly.

If WWOO is loaded after Larion, which is not easy to predict, mountains taller than Y=320 will be "chopped" beacuse WWOO overwrites the file that determines world height.

By unpacking the WWOO .zip/.jar file and removing all three files named overworld.json, the issue is now gone and load order is no longer important!

Be sure to also use Cliffs and Coves by the same author, as it can greatly improve the look of coasts and beaches. There is also Navigable Rivers, but it's not important as Larion does pretty much the same thing with its river tunnels.

William Wyther's Expanded Ecosphere

Used to be 100% compatible. However newer versions of Expanded Ecosphere overwrite noise_settings/overworld.json, overwriting many Larion changes such as temperature bands, terrain above Y=220, rivers carving caves, lava rivers..

Terralith

50% compatible. Terralith overwrites a few of the same files. By loading it before Larion you will get Terralith's new biomes and Larion's terrain, which is quite interesting, but you'll miss out on Terralith's impressive biome-specific terrain features.

Continents

Incompatible. Both overwrite density_function/overworld/continents.json, but you can still use them together if you prefer the continents of Continents.

Tectonic, Lithosphere, Cascades, Eldor

Incompatible. All these packs modify the same core files as Larion, altering terrain generation with different goals in mind. Whichever mod is loaded last will overwrite 99% of the features added by any of the other mods.

Special thanks to

• alkexr, creator of Eldor. Eldor was a major insipration for this pack and I used many of its clever density functions as a reference. for several changes.
• jacobsjo, creator of Saddle Valley Rivers
• devpelux, creator of X-Mountains
• Apollo, creator of Deeper oceans and Tectonic
• Klinbee, creator of More Density Functions

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More info can be found on the project's GitHub page.