Java Edition 20w15a

20w15a is the eleventh snapshot for Java Edition 1.16, released on April 8, 2020, which adds a new Nether biome, new music tracks, new blocks, and other changes and fixes.

Blocks

 * Blackstone
 * Generates in basalt deltas.
 * Can be used in place of cobblestone to craft furnaces and stone tools.
 * Has a slab, stair, and wall variant.


 * Blackstone Slab, Blackstone Stairs, Blackstone Wall
 * Decorative blocks crafted from blackstone.


 * Chiseled Nether Bricks
 * New variant of Nether bricks.
 * Crafted from 2 Nether brick slabs.


 * Chiseled Polished Blackstone
 * Decorative block crafted from polished blackstone.


 * Cracked Nether Bricks
 * New variant of Nether bricks.
 * Obtained by smelting Nether bricks in a furnace.


 * Cracked Polished Blackstone Bricks
 * Decorative blocks crafted from polished blackstone.


 * Gilded Blackstone
 * Has a chance of dropping 2–5 gold nuggets (increased with Fortune), or it will drop itself instead.
 * Currently only available via the creative inventory or by using commands.


 * Polished Blackstone
 * Crafted with 4 blackstone.
 * Has a chiseled, slab, stair, and wall variant.
 * Can be crafted into buttons and pressure plates.


 * Polished Blackstone Bricks
 * Crafted with 4 polished blackstone
 * Has a cracked, slab, stair, and wall variant.


 * Polished Blackstone Brick Slab, Polished Blackstone Brick Stairs, Polished Blackstone Brick Wall
 * Decorative blocks crafted from polished blackstone bricks.


 * Polished Blackstone Button and Polished Blackstone Pressure Plate
 * Redstone blocks crafted from polished blackstone.
 * Work like their stone counterparts.


 * Polished Blackstone Slab, Polished Blackstone Stairs, and Polished Blackstone Wall
 * Decorative blocks crafted from polished blackstone.


 * Quartz Bricks
 * A decorative block crafted from 4 blocks of quartz.


 * Soul Campfire
 * Have a blue flame instead of orange.
 * Has a light level of 10.
 * Does the same amount of damage as a regular campfire.
 * Crafted with soul sand or soul soil instead of coal.
 * Piglins are repelled by soul campfires.

Items

 * Piglin Banner Pattern
 * New pattern for banners, the Piglin.
 * Used in the loom to apply the Piglin pattern to the banner.
 * Currently unobtainable in Survival Mode

World Generation

 * Biomes
 * Basalt Deltas
 * A volcanic biome in the Nether. Fog effects have flakes of volcanic ash.
 * Filled with pillars of basalt and large areas of blackstone.
 * Ghasts, magma cubes, and striders spawn in this biome.

General

 * Accessibility
 * Chat line spacing can now be adjusted.
 * A chat delay can be set between 0 (default) and 6 seconds.


 * Music
 * Added 3 new soundtracks to the Nether, composed by Lena Raine: "Rubedo", "Chrysopoeia" and "So Below".
 * "Rubedo" plays in the nether wastes biome.
 * "Chrysopoeia" plays in the crimson forest biome.
 * "So Below" plays in the soul sand valley and basalt deltas biomes.


 * Sound
 * Added 31 ambient sounds for the basalt deltas.


 * Tags
 * Added block tag.
 * Contains campfires and soul campfires.
 * Bees, parrots, and turtles will view blocks in this tag as dealing fire damage and pathfind accordingly.
 * Campfires use this tag to determine if they are lit or not.
 * Flint and steel uses this tag to determine if it can light campfires.
 * Added block tag.
 * Contains container blocks (chests, trapped chests, ender chests, barrels, the  block tag) and gold blocks (blocks of gold, gilded blackstone, and the   block tag).
 * Piglins will become hostile towards a player that destroys a block in this tag.
 * Added item tag.
 * Contains cobblestone and blackstone.
 * Items in this tag can be used to craft furnaces and will unlock the recipe in the recipe book.
 * Added item tag.
 * Contains cobblestone and blackstone.
 * Items in this tag can be used to craft stone tools and will unlock the recipes in the recipe book.
 * Added item tag.
 * Parallels the block tag.
 * Contains soul sand and soul soil.
 * Items in this tag can be used to craft soul fire torches and soul campfires and will unlock the recipes in the recipe book.

Blocks

 * Dispensers
 * Can now saddle pigs, striders, and tamed horses, donkeys and mules.
 * Can now put horse armor on tamed horses.
 * Can now put carpets on tamed llamas.
 * Can now put chests on tamed llamas, donkeys, and mules.
 * Can now shear mooshrooms and snow golems.


 * Furnaces
 * Can now be crafted with blackstone.


 * Soul fire torches
 * Can now also be crafted with soul sand.


 * Walls
 * Now connects to the bottom and sides of glass panes and iron bars.
 * Now connects to the bottom of sea pickles.

Items

 * Stone axes, hoes, pickaxes, shovels, and swords
 * Can now be crafted with blackstone.


 * Hoes
 * Are now the default tool for mining leaves.
 * Shears are still used for collecting leaf blocks.


 * Fungi, nether sprouts, roots, nether wart, nether wart blocks, warped wart blocks, twisting vines, and weeping vines
 * Can now be composted.

Mobs

 * General
 * Mobs now avoid walking on magma blocks and lit campfires.


 * Hoglins
 * Baby hoglins no longer drop loot (but still drop experience).


 * Magma cubes
 * Spawn commonly in basalt deltas.


 * Piglins
 * Now avoid soul campfires.
 * Now become hostile towards any player that breaks a chest, trapped chest, ender chest, barrel, gold ore, nether gold ore, gilded blackstone, or a gold block.


 * Striders
 * Now turn blueish-purple outside of lava.
 * When outside lava, their facial expression becomes a more prominent frown.
 * Can now only spawn if the block above the lava is air.
 * Baby striders ride on top of bigger striders.


 * Zoglins
 * Are now considered undead and attack Creepers

General

 * Tags
 * Added polished blackstone, and (where applicable) blackstone blocks and items to the block and item tags.
 * Added soul campfires to the block tag.
 * Added the  block tag and removed lanterns and soul fire lanterns from the  block tag.


 * Textures
 * Changed strider texture from [[File:Strider Texture JE1.png]] to [[File:Strider Texture JE2.png]] to remove an unused fin. The fin itself was not vieweable in-game.

Video
Video made by slicedlime:

Trivia

 * The word "Rubedo" is Latin for "redness", it was adopted by alchemists to refer to the final stage of creating the philosopher's stone, it is also likely associated with the red-colored environment of the Nether.
 * The word "Chrysopoeia" is an alchemical term that describes the creation of the philosopher's stone, or the transmutation of a given object into gold.