Underground Villages Mod in All the Mods 10

Underground Villages Mod is part of the pack, and this version ships with Underground Villages Mod 4.0.3, built for NeoForge on Minecraft 1.21.1 (the file is UndergroundVillages-neoforge-1.21.1-4.0.3.jar).^[1]

It isn't a new addition, either. The pack has carried it since version 0.42 or earlier, so it's been around for a long time.^[1]

I can't give you a feature rundown for this one. The sources I have only cover which version is in the pack, not what the mod adds or how it behaves, and I won't guess at details such as structures, loot or config options.^[1]

The sources for this mod show world generation data only, so this section covers how the underground village structure is placed and what fills it.^[2][3]

Where and how often villages spawn

The underground village can generate in these biomes: desert, plains, meadow, savanna, snowy plains and taiga.^[4]

Placement uses a random spread with a spacing of 32 and a separation of 7. The structure set contains just one entry, the underground village, with a weight of 1.^[5]

The village itself is a jigsaw structure. It starts from the town centers pool, has a size of 6 and stays within 80 of its center. It generates in the underground decoration step, and its terrain adaptation is beard_thin.^[3]

What fills the village

Decorations come from a weighted pool. A lamp piece has a weight of 2, and a placed oak tree, a plains flower patch and a hay pile each have a weight of 1. An empty option with a weight of 2 means some spots stay bare.^[6]

There is also a separate tree pool, and it only contains the oak.^[7]

Animal pens are picked from another pool. Cows and pigs are the most common, each with a weight of 7. The horse variants (horses_1 to horses_5) and the sheep variants (sheep_1 and sheep_2) each have a weight of 1, and an empty option has a weight of 5.^[8]

Butchers get their own animal pool: cows and pigs at a weight of 3 each, and the sheep variants sheep_1 and sheep_2 at a weight of 1 each.^[9]

Cats come from a pool of coat variants, each with a weight of 1, plus an empty option with a weight of 3. An iron golem piece and a well bottom piece each sit in a pool of their own with a single entry at a weight of 1.^[10][11][12]

Street terminators and the street_cave processor

The terminators pool holds the pieces terminator_01 to terminator_04, each with a weight of 1. All of them run the street_cave processor.^[13]

That processor rewrites blocks as the pieces are placed. Calcite where water already exists becomes oak planks. Other calcite has a 0.1 probability of becoming a non-snowy grass block. Grass blocks and dirt that sit where water already exists are turned into water.^[14]

Unverified The pools for houses, streets, town centers and villagers, along with the zombie variants of those pools, live in the mod's data files under village/underground. The sources here do not show their contents.

The data available for Underground Villages is all world generation. It adds an underground village structure for you to find, so for this mod the path is exploration rather than a ladder of tiers.^[2][3]

Where the villages can generate

The underground village can only start in a fixed list of biomes: desert, plains, meadow, savanna, snowy plains and taiga. If you want to find one, search below those biomes.^[3][4]

Placement uses a random spread with a spacing of 32 and a separation of 7, so villages are scattered across the world rather than packed together. The structure is generated in the underground decoration step.^[3][5]

What the structure is made of

The village is a jigsaw structure that starts from a town center piece, with a size of 6 and a maximum distance from the center of 80.^[3]

• Animal pens can contain cows, pigs, horses and sheep. Cows and pigs are the most common pens, each with a weight of 7, while each horse and sheep pen has a weight of 1. There is also an empty option with a weight of 5, so some spots have no pen at all.^[8]
• The village has a piece for an iron golem and a piece for the bottom of a well.^[11][12]
• A street processor swaps calcite for grass blocks with a probability of 0.1 per block. It also swaps calcite for oak planks where water is present.^[14]

Underground Villages Mod has been in the pack since All the Mods 10 0.42 or earlier. All the Mods 10 8.2 ships version 4.0.3, using the file UndergroundVillages-neoforge-1.21.1-4.0.3.jar.^[1]

Pack releases that updated the mod

• All the Mods 10 2.43: updated from 4.0.0 to 4.0.1.^[15]
• All the Mods 10 2.47: updated from 4.0.1 to 4.0.2.^[16]
• All the Mods 10 4.3: updated from 4.0.2 to 4.0.3, the version you get in 8.2.^[1][17]

The pack changelogs only record these version bumps. They don't say what changed inside the mod, and I don't have the mod's own changelogs for the shipped jars, so I can't tell you what each update fixed or added.^[15][16][17]

The pack changelogs list no further Underground Villages updates after 4.0.3, so that is what you're running in 8.2.^[1][17]