YUNG's Cave Biomes in FTB Evolution 2
FTB Evolution 2 1.4.0 ships version 26.1.2-NeoForge-4.1.1 · First seen in 1.0.2
YUNG's Cave Biomes is a mod in FTB Evolution 2 1.4.0, where it is version 26.1.2-NeoForge-4.1.1. Adds new vanilla+ cave biomes and underground content! (Summary from the mod's Modrinth page.)
YUNG's Cave Biomes guide for FTB Evolution 2
Last verified for FTB Evolution 2 v1.4.0 on Oct 16, 2026 · text last changed Oct 16, 2026
- Sections
- 5
- Recipes shown
- 12
- Items named
- 17
Every recipe and number here was checked against FTB Evolution 2 1.4.0, read from the running game on Oct 17, 2026.
What is YUNG's Cave Biomes?
2 parts
YUNG's Cave Biomes is a vanilla+ mod that adds two new cave biomes to the world: the Frosted Caves and the Lost Caves. Each biome comes with its own new mob, new blocks, items and music, so digging down gets more interesting without turning the game into something else.[1]
This pack ships version 26.1.2-NeoForge-4.1.1 of the mod. It was already in the pack by 1.0.2 or earlier, so it is a long-standing part of the world generation rather than a recent addition.[2]
Where it sits in the quest book
Unverified The sources here do not show any quest book chapter, group or position for this mod, nor whether the ATM Star path uses it. Check the pack's quest book in game if you want to confirm.
Visual compatibility notes
The mod is meant to work with every other mod, including other worldgen mods. The Lost Caves have sandstorms with thick yellow fog, and a few rendering mods affect how that looks.[1]
With Optifine or Iris, the thick yellow sandstorm fog won't render in the Lost Caves, and Enchanted Ice stays visible even when embedded in ice. Neither affects gameplay.[1]
How do you get started with YUNG's Cave Biomes?
6 parts
YUNG's Cave Biomes adds two new cave biomes, the Frosted Caves and the Lost Caves. Each one brings its own mob, blocks, items and music. In this pack, the recipes for the mod are all about the Ancient Sandstone family of building blocks, plus one armor trim template. So your first steps are mostly exploring and then building.[1][3]
Step 1: Find the caves
The mod has its own advancements to point you underground. The root one says "Explore the underground...", and two more ask you to discover the Frosted Caves and to set foot in the Lost Caves. Treat those as your first goals.[4]
Step 2: Craft Ancient Sandstone
Ancient Sandstone is the block to start with. The other ancient blocks in the pack's recipe list are variants of it, so it is the base of the whole set.[3][4]
Crafting Shaped
4 × Ancient Sand
Recipe id: yungscavebiomes:ancient_sandstone
The in-pack crafting recipe for the base block.
Step 3: Make the shaped variants
Once you have the base block, the pack gives you recipes for the finished building blocks. Cut Ancient Sandstone is crafted four at a time.[3]
This recipe makes 4 Cut Ancient Sandstone.
Smooth Ancient Sandstone is made by smelting rather than crafting.[3]
A smelting recipe.
Step 4: Stairs, slabs and walls
- Ancient Sandstone Stairs: the crafting recipe makes 4 stairs.[3]
- Ancient Sandstone Slab: the crafting recipe makes 6 slabs, and the stonecutting recipe makes 2.[3]
- Ancient Sandstone Wall: the crafting recipe makes 6 walls.[3]
Crafting Shaped
6 × Ancient Sandstone or Chiseled Ancient Sandstone or Cut Ancient Sandstone
Recipe id: yungscavebiomes:ancient_sandstone_stairs
Crafts 4 Ancient Sandstone Stairs.
Stonecutting
Recipe id: yungscavebiomes:ancient_sandstone_slab_from_stonecutting
The stonecutter route for slabs makes 2.
Most of the family also has stonecutting recipes. Examples are Chiseled Ancient Sandstone and Layered Ancient Sandstone, so a stonecutter can save you crafting steps.[3]
Stonecutting
Recipe id: yungscavebiomes:chiseled_ancient_sandstone_from_stonecutting
Step 5: The armor trim
When you want something fancier, Ancient Armor Trim is the mod's armor trim. Its crafting recipe gives 2 templates.[3][4]
Crafting Shaped
| Diamond | Diamond | |
| Diamond | Diamond | |
| Diamond | Diamond | Diamond |
Recipe id: yungscavebiomes:ancient_armor_trim_smithing_template
Crafts 2 Ancient Armor Trim templates.
Stay safe down there
The caves can hurt you. The mod's death messages mention falling icicles and prickly vines. The Frost effect slows your movement and deals damage over time, and the Buffeted effect slows you and narrows your field of view.[4]
How does YUNG's Cave Biomes work?
4 parts
YUNG's Cave Biomes is a vanilla+ worldgen mod that adds two cave biomes, the Frosted Caves and the Lost Caves, each with its own mob, blocks, items and music. So the mechanics worth knowing here are how the caves generate, what lives in them and what they do to you.[1]
The two biomes
Both biomes sit in the mod's cave_biomes tag. The Frosted Caves have a temperature of 0, while the Lost Caves have a temperature of 2.0.[5][6][7]
- Frosted Caves: the mod's Ice Cube spawns here with weight 100 in groups of 2 to 4. Strays, skeletons, creepers and spiders also spawn at weight 100 in groups of 4, and glow squid can appear in underground water in groups of 4 to 6.[6]
- Lost Caves: the Sand Snapper spawns with weight 100 in groups of 1 to 2. Husks, skeletons, creepers and spiders spawn at weight 100 in groups of 4.[7]
- Both biomes also spawn bats in groups of 8.[6][7]
Frosted Caves terrain
The ice patches are vegetation patches made of packed ice. They generate on both the floor and the ceiling, with a horizontal radius of 4 to 7 blocks and a depth of 3 to 4.[8][9]
Icicles come in a few sizes. The large icicle feature has a column radius of 4 to 19 and a rare ice chance of 0.4. The small icicle has a rare ice chance of 0.1. The block behind that rare ice setting is called Enchanted Ice in game. A tilted large icicle variant also exists, with a wind speed of 0.3 to 0.6 compared with 0 to 0.3 on the normal one. Separate icicle clusters use a radius of 2 to 8 and a height of 3 to 6.[4][10][11][12][13]
Two hazards come from this biome. The Frost effect slows your movement and applies damage over time, and you can brew a Potion of Frost. Falling icicles can also kill you, with their own death message.[4]
Lost Caves terrain
Lost Caves ceilings get patches where layered ancient sandstone is swapped for brittle ancient sandstone. The biome also generates pillars made of layered ancient sandstone, plus cactus patches.[14][15][16]
Watch out for Prickly Vines and the Prickly Peach Cactus. Prickly vines have their own death message, and the mod has an advancement for touching the cactus.[4]
Sandstorms are a Lost Caves feature. The mod has a command that starts or stops a sandstorm in all Lost Caves in a dimension, and the Buffeted effect slows movement and narrows your field of view.[1][4]
Crafting the building blocks
The mod's recipes are building blocks and a smithing template, all made at the crafting table, furnace or stonecutter. The recipe blocks below show the exact in-pack versions.[3]
Crafting Shaped
4 × Ancient Sand
Recipe id: yungscavebiomes:ancient_sandstone
Crafting Shaped
Recipe id: yungscavebiomes:layered_ancient_sandstone
One craft makes 2 Layered Ancient Sandstone.
One craft makes 4 Cut Ancient Sandstone.
This one is a smelting recipe.
Crafting Shaped
| Diamond | Diamond | |
| Diamond | Diamond | |
| Diamond | Diamond | Diamond |
Recipe id: yungscavebiomes:ancient_armor_trim_smithing_template
One craft makes 2 Ancient Armor Trim templates.
The stonecutter also handles the ancient sandstone family. It makes Ancient Sandstone Slab (2 per cut), Ancient Sandstone Stairs, Ancient Sandstone Wall, Chiseled Ancient Sandstone, Cut Ancient Sandstone and Layered Ancient Sandstone. There are further stonecutting recipes for the smooth and cut slabs and the smooth stairs.[3]
Unverified The exact generation settings for the prickly peach cactus patches, the Lost Caves surface replacement, the sandstone glow lichen and the frost lily placement live in the mod's worldgen data files. The sources here do not show those files, and the pack has no config files for this mod, so those details are not confirmed.
How do you progress through YUNG's Cave Biomes?
5 parts
Here's the honest picture for YUNG's Cave Biomes in this pack: the sources show a set of building-block recipes built around Ancient Sandstone, plus one archaeology drop. They do not show a tiered path where one step gates the next. Below is what you can craft and how the pieces connect.[3][17]
Unverified Where this mod sits in the pack's progression is not shown by the sources here. They contain no quest chapter that involves this mod, so check the pack's quest book yourself to see whether anything points you towards it.
The Ancient Sandstone chain
Everything starts with Ancient Sandstone. It is a shaped crafting recipe from the mod itself, and the recipe block below shows the exact in-pack version.[3]
Crafting Shaped
4 × Ancient Sand
Recipe id: yungscavebiomes:ancient_sandstone
The base block that the rest of the chain builds on.
From there, the sources show these variants:[3]
- Cut Ancient Sandstone is crafted in a batch of 4, and it also has a stonecutting recipe.[3]
- Smooth Ancient Sandstone comes from a smelting recipe.[3]
- Chiseled Ancient Sandstone has both a crafting recipe and a stonecutting recipe.[3]
- Layered Ancient Sandstone is crafted 2 at a time, and it has a stonecutting recipe too.[3]
- Brittle Ancient Sandstone has its own shaped crafting recipe.[3]
Crafting this gives you 4 Cut Ancient Sandstone.
This one is a smelting recipe.
Slabs, stairs and walls
Ancient Sandstone Slab, Ancient Sandstone Stairs and Ancient Sandstone Wall each have a crafting recipe and a stonecutting recipe in the pack. The recipe blocks below show the exact versions.[3]
Crafting Shaped
Recipe id: yungscavebiomes:ancient_sandstone_slab
Crafting gives 6 slabs.
The cut and smooth versions have their own pieces as well: Cut Ancient Sandstone Slab, Smooth Ancient Sandstone Slab and Smooth Ancient Sandstone Stairs. The pack also has stonecutting recipes for these.[3]
Crafting Shaped
Recipe id: yungscavebiomes:cut_ancient_sandstone_slab
Crafting gives 6 cut slabs.
Crafting Shaped
6 × Ancient Sandstone or Chiseled Ancient Sandstone or Cut Ancient Sandstone
Recipe id: yungscavebiomes:ancient_sandstone_stairs
Crafting makes 4 stairs.
Crafting gives 6 walls.
Other sandstone blocks
The mod also has regular-sandstone relatives: Layered Sandstone, Layered Red Sandstone, Brittle Sandstone and Brittle Red Sandstone. Each one has its own shaped crafting recipe.[3]
Crafting Shaped
| Sandstone |
| Sand |
Recipe id: yungscavebiomes:brittle_sandstone
The brittle blocks follow this kind of shaped recipe.
Ancient Armor Trim
Ancient Armor Trim can be crafted, and a craft makes 2. It is also one of the possible results in the sand snapper archaeology loot table. That table lists six outcomes, including pottery sherds, a brick, an emerald and a stick, and every entry has the same weight of 1.[3][17]
Crafting Shaped
| Diamond | Diamond | |
| Diamond | Diamond | |
| Diamond | Diamond | Diamond |
Recipe id: yungscavebiomes:ancient_armor_trim_smithing_template
Crafting gives 2 templates.
What drops when you break them
The block loot tables for the Ancient Sandstone family are simple. Ancient Sandstone, its slab, stairs and wall, the cut, chiseled and layered Ancient Sandstone, and the brittle Ancient Sandstone each drop themselves, with a survives-explosion condition.[18][19][20][21][22][23][24][25][26][27]
What changed in YUNG's Cave Biomes between versions?
1 part
FTB Evolution 2 1.1.0 ships YUNG's Cave Biomes version 26.1.2-NeoForge-4.1.1. The mod has been in the pack since FTB Evolution 2 1.0.2 or earlier, so you have had it for a while.[2]
26.1.2-NeoForge-4.1.1
The mod's own changelog for the version in this pack is short: it attempts to fix crashes related to pottery patterns and sprite sheets when the mod is used alongside a few other mods. The changelog does not say which other mods are involved.[28]
Unverified The pack changelogs here have no entries for this mod, so which pack release updated it to this version is not shown in the sources, and neither are any changes in earlier versions.
Sources
- YUNG's Cave Biomes project page (modrinth) · official mod data
- FTB Evolution 2 1.1.0 mod list · pack file
- FTB Evolution 2 1.1.0 recipe dump: recipes making YUNG's Cave Biomes items · pack recipe dump
- yungscavebiomes names, screen text and descriptions (English lang file) · official mod data
- data/yungscavebiomes/tags/worldgen/biome/cave_biomes.json (yungscavebiomes's jar) · official mod data
- data/yungscavebiomes/worldgen/biome/frosted_caves.json (yungscavebiomes's jar) · official mod data
- data/yungscavebiomes/worldgen/biome/lost_caves.json (yungscavebiomes's jar) · official mod data
- data/yungscavebiomes/worldgen/configured_feature/frosted_caves/ice_patch_ceiling.json (yungscavebiomes's jar) · official mod data
- data/yungscavebiomes/worldgen/configured_feature/frosted_caves/ice_patch.json (yungscavebiomes's jar) · official mod data
- data/yungscavebiomes/worldgen/configured_feature/frosted_caves/icicles.json (yungscavebiomes's jar) · official mod data
- data/yungscavebiomes/worldgen/configured_feature/frosted_caves/large_icicle_tilted.json (yungscavebiomes's jar) · official mod data
- data/yungscavebiomes/worldgen/configured_feature/frosted_caves/large_icicle.json (yungscavebiomes's jar) · official mod data
- data/yungscavebiomes/worldgen/configured_feature/frosted_caves/small_icicle.json (yungscavebiomes's jar) · official mod data
- data/yungscavebiomes/worldgen/configured_feature/lost_caves/brittle_sandstone_ceiling_patch.json (yungscavebiomes's jar) · official mod data
- data/yungscavebiomes/worldgen/configured_feature/lost_caves/cactus_patch.json (yungscavebiomes's jar) · official mod data
- data/yungscavebiomes/worldgen/configured_feature/lost_caves/layered_sandstone_pillar.json (yungscavebiomes's jar) · official mod data
- data/yungscavebiomes/loot_table/archaeology/sand_snapper_loot.json (yungscavebiomes's jar) · official mod data
- data/yungscavebiomes/loot_table/blocks/ancient_sand.json (yungscavebiomes's jar) · official mod data
- data/yungscavebiomes/loot_table/blocks/ancient_sandstone_slab.json (yungscavebiomes's jar) · official mod data
- data/yungscavebiomes/loot_table/blocks/ancient_sandstone_stairs.json (yungscavebiomes's jar) · official mod data
- data/yungscavebiomes/loot_table/blocks/ancient_sandstone_wall.json (yungscavebiomes's jar) · official mod data
- data/yungscavebiomes/loot_table/blocks/ancient_sandstone.json (yungscavebiomes's jar) · official mod data
- data/yungscavebiomes/loot_table/blocks/brittle_ancient_sandstone.json (yungscavebiomes's jar) · official mod data
- data/yungscavebiomes/loot_table/blocks/chiseled_ancient_sandstone.json (yungscavebiomes's jar) · official mod data
- data/yungscavebiomes/loot_table/blocks/cut_ancient_sandstone_slab.json (yungscavebiomes's jar) · official mod data
- data/yungscavebiomes/loot_table/blocks/cut_ancient_sandstone.json (yungscavebiomes's jar) · official mod data
- data/yungscavebiomes/loot_table/blocks/layered_ancient_sandstone.json (yungscavebiomes's jar) · official mod data
- YUNG's Cave Biomes 26.1.2-NeoForge-4.1.1 changelog · changelog
Where this guide comes from
Written from what FTB Evolution 2 itself ships: its files and recipes, the in-game guidebooks and the mods' own pages. Every statement links to the source it came from, and the numbers are checked against the pack before publishing.
Guide last verified Oct 16, 2026.
Report wrong info
Version in each release
9 releases, first in 1.0.2
| FTB Evolution 2 | Version | Jar | Where it came from |
|---|---|---|---|
| 1.4.0 Oct 17, 2026 | 26.1.2-NeoForge-4.1.1 | YungsCaveBiomes-26.1.2-NeoForge-4.1.1.jar | From the published release |
| 1.3.2 Oct 16, 2026 | 26.1.2-NeoForge-4.1.1 | YungsCaveBiomes-26.1.2-NeoForge-4.1.1.jar | From the published release |
| 1.3.1 Oct 15, 2026 | 26.1.2-NeoForge-4.1.1 | YungsCaveBiomes-26.1.2-NeoForge-4.1.1.jar | From the published release |
| 1.3.0 Oct 14, 2026 | 26.1.2-NeoForge-4.1.1 | YungsCaveBiomes-26.1.2-NeoForge-4.1.1.jar | From the published release |
| 1.2.2 Oct 13, 2026 | 26.1.2-NeoForge-4.1.1 | YungsCaveBiomes-26.1.2-NeoForge-4.1.1.jar | From the published release |
| 1.2.1 Oct 12, 2026 | 26.1.2-NeoForge-4.1.1 | YungsCaveBiomes-26.1.2-NeoForge-4.1.1.jar | From the published release |
| 1.2.0 Oct 12, 2026 | 26.1.2-NeoForge-4.1.1 | YungsCaveBiomes-26.1.2-NeoForge-4.1.1.jar | From the published release |
| 1.1.0 Oct 10, 2026 | 26.1.2-NeoForge-4.1.1 | YungsCaveBiomes-26.1.2-NeoForge-4.1.1.jar | From the published release |
| 1.0.2 Oct 8, 2026 | 26.1.2-NeoForge-4.1.1 | YungsCaveBiomes-26.1.2-NeoForge-4.1.1.jar | From the published release |
"From pack files" means the list came from the pack's own files; "from the published release" means ForgeBase read the jars of the release itself.
Items and blocks
30 items from the 1.4.0 recipe dump.
Ancient Armor Trim
Ancient Sand
Ancient Sandstone
Ancient Sandstone Slab
Ancient Sandstone Stairs
Ancient Sandstone Wall
Brittle Ancient Sandstone
Brittle Red Sandstone
Brittle Sandstone
Chiseled Ancient Sandstone
Clock Pottery Sherd
Cut Ancient Sandstone
Cut Ancient Sandstone Slab
Frost Lily
Hourglass Pottery Sherd
Ice Cube Spawn Egg
Creeping Ice
Icicle
Layered Ancient Sandstone
Layered Red Sandstone
Layered Sandstone
Prickly Peach
Prickly Peach Cactus
Prickly Vines
Enchanted Ice
Sand Snapper Spawn Egg
Smooth Ancient Sandstone
Smooth Ancient Sandstone Slab
Smooth Ancient Sandstone Stairs
Suspicious Ancient Sand
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