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
 * Bush-like block which can be planted on dirt and grass blocks.
 * Azalea can grow from moss blocks when bone meal is used on them.


 * Azalea Leaves
 * Has variants with either no blossoms or pink blossoms.
 * Yield azalea and sticks on decay.


 * Cave Vines
 * A natural light source, with a light level of 10 or 14 (depending on whether it's head or body).
 * Drop glow berries.
 * Growth can be sped up using bone meal.
 * Berries can be harvested by with the vine.
 * Grow from glow berries when placed on the underside of a block.
 * Unlike regular vines, they cannot be climbed.


 * Dripleaf
 * Allows an entity to stay on it for 1.5 seconds (30 ticks), before the entity 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.
 * Comes in two sizes: Small and Big. Small can be applied bone meal to grow into Big.
 * Small Dripleaf can only be obtained with shears (otherwise breaks), and can only be planted on clay, or underwater on clay and dirt blocks.
 * Big Dripleaf can be obtained with any tool or by hand, as well as breaking it using projectiles, and can be planted on grass and dirt blocks.


 * Flowering Azalea
 * A variant of the azalea with pink blossoms.


 * Hanging Roots
 * Decorative blocks that can only be placed on the underside of a block.
 * Obtained with shears, otherwise breaks.


 * Moss Block
 * An opaque block with a grass-like texture on all sides.
 * Can be bonemealed to grow grass, tall grass, moss carpets and both types of azaleas on it and in its vicinity.
 * Breaks when pushed by a piston.


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


 * Rooted Dirt
 * Decorative blocks.
 * A dirt-like block with roots on its texture.
 * Similar to coarse dirt, neither mycelium nor grass spread to it.


 * Spore Blossom
 * Can only be placed on the underside of a block.
 * Sends particles downward when opened.

Items

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

General

 * Particles
 * Added new particles: ,


 * 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.


 * Textures


 * Added a block texture named.
 * This texture is unused in-game.

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.
 * Is now affected by the gamerule.


 * Composter
 * Some items are now compostable:
 * 30% chance: non-flowering azalea leaves, glow berries, moss carpet, small dripleaf, hanging roots.
 * 50% chance: flowering azalea leaves.
 * 65% chance: spore blossoms, non-flowering azalea, moss blocks, big dripleaf.
 * 85% chance: flowering azalea.


 * 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.

Items

 * Bundle
 * The player now receives a tutorial when first having a bundle in the inventory.

Mobs

 * Drowned
 * Now have a chance of dropping a copper ingot instead of a gold ingot, to match Bedrock Edition.


 * Foxes
 * Eat glow berries.
 * Can now walk over powder snow without sinking.


 * Skeletons
 * Begin the process of turning into strays when they are inside powder snow after 30 second and finally turn into strays after 45 second.


 * Wandering Traders
 * May now sell Small Dripleaf.

Gameplay

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


 * NBT data
 * All projectile entity data now has a field called HasBeenShot.
 * If this field is false, during the next tick the projectile will fire a projectile shot game event, causing any nearby sculk sensors to react.

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.


 * Resource packs
 * Improved performance when using many overrides on an item model.
 * toasts.png GUI texture has a new icon for the bundle tutorial.


 * 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: