Java Edition 20w45a

20w45a is the first snapshot for Java Edition 1.17, released on November 4, 2020, which adds the first Caves & Cliffs features.

Blocks

 * Amethyst ud
 * Amethyst Budding
 * Amethyst Cluster
 * Block of Amethyst
 * Block of Copper
 * Calcite
 * Candle
 * Copper Ore
 * Cut Copper
 * Cut Copper Slab
 * Cut Copper Stairs
 * Lightning Rod
 * Tinted Glass
 * Tuff

Items

 * Amethyst Shard
 * Bundle
 * Copper Ingot
 * Spyglass

Blocks

 * Cauldrons
 * Can now be filled with lava.
 * Lava filled cauldrons give off a redstone signal of strength 1.
 * Grass Path
 * Renamed to "Dirt Path".
 * Can now be made on top of dirt, coarse dirt, mycelium, and podzol.
 * Pistons
 * Particles will now appear if a block is broken by a piston.
 * Rails
 * Are now waterloggable.
 * Water
 * Flowing water no longer breaks rails.

Items

 * Firework Rockets
 * Simple firework rockets with one gunpowder can now be crafted using the recipe book.

Entities

 * Experience Orbs
 * Will now sometimes merge when in large quantities, to improve performance.
 * Merging will not affect the amount of experience gathered from collecting the merged orbs.
 * Minecarts
 * Can now move in water.
 * Shulkers
 * If a shulker is hit by another shulker's bullet, it now has a chance of spawning a new shulker.