Minecraft:Caves & Cliffs Prototype Data Pack

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The Caves & Cliffs Prototype Data Pack is an official Minecraft:data pack that was released periodically by Mojang Studios from April 2021 to May 2021.<ref>Caves & Cliffs Prototype Data Pack for Minecraft Java Edition – feedback.minecraft.net</ref> It contains several experimental and work-in-progress features, most of which were eventually released in Minecraft:Java Edition 1.18. Its first release coincided with the announcement that Minecraft:Caves & Cliffs would be split into two major updates.<ref>Template:Snap</ref><ref>Template:Mcnet</ref> The data pack was eventually superseded by Minecraft:experimental snapshots as changes that are too large for a data pack were introduced.<ref>Template:Mcnet</ref>

Features

Items

Minecraft:Bundles can be crafted once again.

General

The Minecraft:height limit has been expanded 64 blocks up and 64 blocks down to a total of 384 blocks, with Y=319 being the limit upward and Y=-64 being the limit downward.

World generation

Deepslate blobs no longer generate above Y=0.
Diorite, granite, and andesite blobs are larger and more spherical, but less common.
Underground generation has been extended 64 blocks down to go along with the downward height expansion.
- Minecraft:Deepslate makes up a majority of the expanded area, with the stone above gradually transitioning to it from Y=-1 to Y=-7 until it is completely replaced by deepslate at Y=-8.
  - Certain types of ores and structures still generate in the deepslate layer, as well as Minecraft:tuff.
  - Minecraft:Dirt, Minecraft:gravel, Minecraft:diorite, Minecraft:granite, and Minecraft:andesite do not generate in this layer.
- Minecraft:Lava replaces air below Y=-53 instead of below Y=11.
- The Minecraft:bedrock layer has been moved down to Y=-64.
Minecraft:Fossils are able to generate at any height instead of just between Y=40 and Y=49.
- Fossils below Y=0 generate with deepslate diamond ore instead of coal ore.
Minecraft:Caves have been completely overhauled.
- Now stretch down to Y=-59.
- New Minecraft:noise caves, coming in three forms: cheese, spaghetti, and noodle.
  - Cheese caves have large stone columns stretching from the bottom of the cave to the top.
    - Very large, often large enough to fly through with Minecraft:elytra.
    - Abundant with Minecraft:springs, aquifers, and Minecraft:ores.
  - Spaghetti caves are long, thin caves that have small aquifers and are more similar to original caves.
  - Noodle caves are thinner, squigglier, and more claustrophobic variants of spaghetti caves.
- Contain Minecraft:aquifers, bodies of Minecraft:water with different heights, independent of sea level (Y=63).
  - Only used below Y=31, meaning any noise caves between Y=31 and Y=63 are flooded with water.
  - Aquifers below Y=0 sometimes generate with lava instead of water.
- The original Minecraft:carvers still exist with their generation slightly tweaked to add more variation and to better blend in with noise caves.
- New crevice carvers, which are deep, long cracks in the ground that are thinner and straighter than Minecraft:canyons.
Minecraft:Ore veins, long and rare formations of Minecraft:ore and rock, have been introduced.

File:21w18a approximate ore distribution.jpg

The new ore generation in the data pack.

Changed the generation of all ores, making them have a spread value like Minecraft:lapis lazuli ore. Some still retain a linear generation alongside a spread generation.
- Minecraft:Copper ore generates between Y=0 and Y=96, and uses spread like all other ores. It peaks at Y=48.
- Minecraft:Emerald ore generates above Y=32 as a spread, peaking at Y=256 and decreasing in quantity as the Minecraft:altitude decreases.
- Minecraft:Coal ore attempts to generate twice: once, evenly between an altitude of Y=136 and Y=256; and as a spread, peaking at an altitude of Y=96 and generating between an altitude of Y=0 and Y=192.
- Minecraft:Iron ore attempts to generate three times: once as a spread peaking at an altitude of Y=256, generating above Y=128; another as a spread peaking at Y=16 and generating with a minimum height of Y=-24 and a maximum height of Y=57, and a smaller one spreading evenly between the altitudes of Y=-64 and Y=64.
- Minecraft:Gold ore generates between the altitudes of Y=-64 and Y=32, peaking at Y=-16. The extra gold that generates in the Minecraft:badlands biome was left untouched.
- Minecraft:Lapis lazuli ore attempts to generate twice: once, as a spread between the altitudes of Y=32 and Y=-32, peaking at an altitude of 0; and evenly between the altitudes of Y=64 and Y=-64, generating buried like Minecraft:ancient debris.
- Minecraft:Redstone ore attempts to generate twice: once, evenly between an altitude of Y=15 and Y=-64; and as a spread, peaking at an altitude of -64 and generating below an altitude of Y=-32.
- Minecraft:Diamond ore generates below Y=16 as a spread, peaking at Y=-64 and decreasing in quantity as the altitude increases.