Java Edition 21w15a

21w15a is the seventeenth snapshot for Java Edition 1.17, released on April 14, 2021, which adds the ability for goats to ram mobs and armor stands, as well as blocks of raw metal. It also reverts most changes to world generation made in previous snapshots, such as height limit and cave types. Due to the technical challenges on the new cave generations and the effects of the COVID-19 pandemic on the developers, these changes will be moved to a holiday release, as seen in the Caves and Cliffs Announcement with Agnes Larsson and Henrik Kniberg.

Blocks

 * Block of Raw Metal
 * Added block of raw iron, block of raw copper and block of raw gold.
 * Piglins don't pick up blocks of raw gold, and don't get angry when a nearby player mines them.
 * Can be obtained through crafting.
 * Can be crafted into their respective raw metal.
 * Can't be smelted.

Sounds

 * Bone Meal
 * Added sounds for using bone meal.

Items

 * Raw Metal
 * Tweaked the textures of raw ore items.

Mobs

 * Goats
 * Goats will avoid walking on powder snow.
 * Goats can now ram other mobs and armor stands to knock them a few blocks.

World Generation

 * World Height
 * World height has been switched back to the 1.16 levels.
 * Worlds created in snapshot 21w05b or any earlier version can now once again be opened.
 * Worlds created in any version between snapshot 21w06a and 21w14a can no longer be opened.


 * Caves
 * Noise caves and aquifers have been switched off.
 * Cave and ravine carvers have been returned to their old settings.
 * Crack carvers have been switched off.


 * Ore Distribution
 * Ore distribution has been returned to the 1.16 setup.
 * Copper now generates between the bottom of the world and height 192, being most common around height 96.
 * Deepslate and Tuff now generates in blobs between heights 0 and 16.

General

 * Title Screen
 * The main menu background is now in an amethyst geode.


 * Creative Inventory
 * Reordered some blocks in the Building Blocks tab in the creative menu.

Trivia

 * This is the first time the world height was decreased since Infdev.