Java Edition 21w05a

21w05a is the seventh snapshot for Java Edition 1.17, released on February 3, 2021, which adds lush cave related features and fixes bugs.

Blocks

 * Azalea
 * Plant-like block.


 * Azalea Leaves
 * Has variants with either no blossoms, pink blossoms, or purple blossoms.


 * Flowering Azalea
 * A variant of the azalea.


 * Cave Vines
 * A natural light source.
 * Drop glow berries.


 * Dripleaf
 * Allows the player to stay on it for 2 seconds (40 ticks), before the player will fall through it.
 * The tilt happens in 3 stages: Unstable, Partial, and Full. These can be seen in the F3 debug menu.
 * All the stages are solid except the Full stage, which is when the player falls through.
 * When nobody is standing on it, it is set to None stage.
 * If the player sneaks on it while it's in the Unstable stage, it will return to None. Sneaking on it while it's in Partial or Full stage has no effect.


 * Hanging Roots


 * Rooted Dirt


 * Moss Block
 * An opaque block with a grass-like texture on all sides.
 * Can be bonemealed.


 * Moss Carpet
 * Same texture as the moss block, but one pixel thick.
 * Crafted with moss blocks.


 * Spore Blossom
 * Can be placed on ceilings.
 * Sends particles downward when opened.

Items

 * Glow Berries
 * Can be eaten, restoring.
 * Grow on cave vines.

General

 * Tags
 * Added the block tag.
 * Contains the #flowers block tag, the #leaves block tag, grass, ferns, sweet berry bushes, and small dripleaf plants.
 * Added the block tag.
 * Contains the cave vines body block and cave vines head block.
 * Added the block tag.
 * Contains the #base_stone_overworld block tag, the #cave_vines block tag, dirt, gravel, sand, moss block, the #flowers block tag, grass, tall grass, moss carpet, small driplead, big dripleaf, big dripleaf stem, and vines.
 * Added the item tag.
 * Contains sweet berries and glow berries.

Blocks

 * Copper block, Cut Copper Block, and variants
 * The stages are now called "Copper Block", "Exposed Copper Block", "Weathered Copper Block" and "Oxidized Copper Block" to match Bedrock Edition.
 * This also applies to cut copper and its variants.
 * Removed Waxed Oxidized Copper block, as it had no use because it could not change state any further.
 * Is now affected by the gamerule.


 * Composter


 * Powder Snow
 * Can now be pushed and pulled by pistons and sticky pistons.
 * Flaming arrows that collide with powder snow will be extinguished.


 * Sculk Sensor
 * Added the following game events that the Sculk Sensor reacts to, along with corresponding frequency value
 * Block change is for when a player or dispenser changes a block.
 * This includes placing a book on a lectern, placing and removing items from a flower pot, putting out a campfire, placing a candle on a cake, tilting a big dripleaf, and putting out a candle.
 * Mob interact is for certain mob interactions to cause vibrations.
 * This includes giving a golden apple to zombie villager with Weakness, healing a tamed wolf, using an iron ingot to heal an iron golem, and most instances of successfully feeding an animal.
 * Prime fuse applies to both creepers and TNT.
 * The equip event checks for giving items to an armor stand and pressing the button to equip armor from the hotbar.
 * Manually equipping armor does not trigger sculk sensors.
 * Removing armor, from the player or from an armor stand, does not trigger sculk sensors.
 * Equipping items on other mobs, such as horses, does not trigger sculk sensors.


 * Stonecutter
 * Can be used to craft the different copper block variants.

Mobs

 * Drowned
 * Now have a chance of dropping a copper ingot instead of a gold ingot, to match Bedrock Edition.
 * Skeletons
 * Turn into strays when they are inside powder snow.
 * Foxes
 * Eat glow berries.
 * Can now walk over powder snow without sinking.

Gameplay

 * Advancements
 * Glow berries are now required for A Balanced Diet.

General

 * Game events
 * Removed the armor stand add item, eating finish, entity hit, and flint and steel use events.
 * Added the block change, drinking finish, eat, entity damaged, entity killed, entity place, equip, mob interact, minecart moving, prime fuse, ravager roar, ring bell, shear, shulker close, and shulker open events.


 * Tags
 * Added azalea leaves and azalea leaves flowers to the block and item tags.
 * Added foxes to the entity type tag.
 * Changed the gave event tag.
 * Renamed to.
 * Added the swim event.
 * Updated the game event tag to match the full list of game events (see above).

Video
Video made by slicedlime on the gameplay changes:

Video made by slicedlime on the technical changes: