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This guide is a simplified overview of all changes in the Caves & Cliffs: Part II update (Template:BE 1.18.x releases), which assumes at least some familiarity with the Caves & Cliffs: Part I update (Bedrock Edition 1.17.x releases).
Mobs Blocks Items Structures
New
Dripstone cluster
File:Large dripstone.png
Dripstone caves
No
No
A large vertical cluster of dripstone blocks.
Ore vein
File:Ore veins.jpg
Underground
No
No
A large cluster of long strips of stones and ores.
Granite and copper ore veins generate above Y level 0.
Tuff and iron ore veins generate below Y level 0.
Changed
All Minecraft:structures
Now hardcoded into world generation.
General
The overworld now uses the multi-noise biome source type.
Terrain generation is now independent from biomes, with biomes adapting to whatever terrain they happen to generate throughout.
This allows for natural variation in the terrain of any individual biome, both in terms of shape and elevation.
For example, forests and deserts could form up on a hill without needing a special biome just for that purpose.
This additionally allows for smoother transitions between biomes.
Terrain is now smoother and more extreme.
Bedrock layers generate dependent on the world seed now.
New random number generator is used for Overworld generation.
Amethyst geode
File:Amethyst geode.png
Now generate only up to Y=30.
Azalea tree
File:Azalea Tree.png
Now generate above lush caves.
Indicates the location of a lush caves biome.
Lots of rooted dirt generate below natural azalea trees.
Minecraft:Fossil
Template:Animate
Generates with deepslate Minecraft:diamond Minecraft:ore instead of Minecraft:coal Minecraft:ore when below Y=0.
Lakes
Template:Animate
Water lakes were removed, because aquifers could provide local water levels.
Lava lakes now generate above Y=0.
Stony shore
File:Stone Shore.png
Now generate with strips of gravel.
Can generate alongside any biome instead of just windswept hills.
Desert pyramid
File:Desert pyramid JE3 BE3.png
No longer generate on water.
Now spawn on the surface rather than at a fixed y-level, but tend to be partially buried.
Monster room
File:Monster Room (Dungeon).png
Increased the amount of dungeons, especially below Y=0.
Buried treasure
File:Chest (S) JE2.png
Can now contain water breathing Minecraft:potions .
Mineshaft
Template:Animate
The starting room no longer generates with a dirt floor.
Now generate higher up in badlands.
Pillager outpost
File:Pillager Outpost.png
Now generate in all the new mountain biomes.
Village
Template:Animate
Now slightly more spread out.
Now generate in meadows.
Biomes
New
Dripstone caves
File:Dripstone Caves.png
Contains lots of dripstone blocks and pointed dripstone on the floor and ceiling.
There are large columns made of dripstone blocks extending from the ceiling to the floor of the cave.
Contains many small pools of Minecraft:water .
Contains larger deposits of copper ore.
Amethyst geodes
Dungeons
Mineshafts
Strongholds
Lush caves
File:Lush Caves.png
An azalea tree generates on the surface to indicate the biome's location.
Terrain is covered with lots of moss and Minecraft:clay .
Many kinds of plants grow in this biome, including grass, vines, dripleaves, azalea, cave vines, and spore blossoms.
Contains many pools and terraces made of clay and water.
Amethyst geodes
Dungeons
Mineshafts
Strongholds
Meadow
File:Mountain Meadows.png
A new mountain sub-biome that often generates at the base of mountains.
Resembles a plains biome with blueish grass and numerous flowers.
Grove
File:Mountain Grove.png
A new mountain sub-biome that generates on the slopes of mountains.
Resembles a snowy taiga biome with a surface made of snow blocks and powder snow.
Snowy slopes
File:Snowy Slopes.png
A new mountain sub-biome that generates on the slopes of mountains.
Consists of several layers of snow and powder snow blocks on top of stone.
Stony peaks
File:Stony Peaks.png
A mountain sub-biome that generates on the peaks of mountains.
Usually generates when the surrounding base biomes are too hot for jagged or frozen peaks.
Has a surface made of stone and strips of calcite.
Jagged peaks
File:Lofty Peaks.png
A mountain sub-biome that generates on the peaks of mountains.
More likely to generate as sharp peaks compared to the other peak biomes.
Has a surface made of stone and snow.
Frozen peaks
File:Snow Capped Peaks.png
A mountain sub-biome that generates on the peaks of mountains.
Tends to generate rounded peaks.
Has a surface made of snow and packed ice.
Changed
All biomes
File:1.18 experimental snapshot 5 reddit.png
File:1.18 experimental snapshot 6 reddit.png
File:1.18 experimental snapshot 7 reddit.png
Terrain, cave, and biome generation has been completely overhauled.
The height limit and depth limit have both been increased by 64 blocks.
There is now natural variation in terrain shape and elevation independently from biomes.
New mountain biomes and cave biomes have been added.
Cave biomes generate naturally underground and inside mountains.
Cave generation has been overhauled to include new types of caves, such as cheese, spaghetti, and noodle caves.
Local water levels and lava levels in caves can create underground water and lava lakes at different elevations.
Ore distribution has been overhauled, with each ore now peaking in frequency at a different elevation.
Large underground ore veins have been added.
Clouds have been raised to Y level 192.
There is now much more variation in beach size.
Ocean biomes temperatures now match land biome temperatures.
Achievements Navigation