Java Edition 21w15a

21w15a is the seventeenth snapshot for Java Edition 1.17, released on April 14, 2021, which added the ability for goats to ram mobs and armor stands. This snapshot rollbacks few changes like height limit and caves due to being really technical.

Changes

 * Goat
 * World Generation
 * World height has been switched back to the 1.16 levels
 * 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 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
 * Tuff now generates in blobs between heights 0 and 16
 * 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

General

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

Trivia

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