Java Edition 21w16a

21w16a is the eighteenth snapshot for Java Edition 1.17, released on April 21, 2021, which adds dripstone growth to the game.

Gameplay

 * Pointed Dripstone Growth
 * If a stalactite is hanging from a dripstone block with a water source above, it will slowly grow both the stalactite from above and a stalagmite from below
 * Growth speed is random but very slow; a single growth step can take several in-game days
 * A stalactite will only grow up to 7 blocks long
 * A stalactite will only cause stalagmite growth if the floor or stalagmite below is within 10 blocks
 * If the stalactite tip is inside water it won’t drip, and therefore will not trigger any growth
 * If the stalagmite tip is inside water or their is a fluid between the two dripstone blocks, it will not receive the water drops, and therefore will not be grown by a dripping stalactite.
 * A stalagmite or stalactite will never grow into a fluid.

Blocks

 * Azalea and Flowering Azalea
 * Can now be bonemealed to form Azalea Trees.


 * Block of Raw Iron and Block of Raw Gold
 * Tweaked the textures of these blocks.


 * Infested Deepslate
 * Can now have random texture rotation like deepslate.


 * Small Dripleaf
 * The model was slightly changed.

Items

 * Raw Metal
 * Tweaked the texture of raw ores.

Gameplay

 * Recipe Book
 * The recipes for stonecutting diorite into polished diorite slabs and stairs now unlocks when the player has diorite as opposed to polished diorite.

General

 * Statistics
 * Renamed the statistic for play time to.
 * Included time when game paused for "Time with World Open".


 * Resource pack prompt
 * Users who previously permanently declined server resource packs will now still be shown the pack prompt if the pack is mandatory, instead of being immediately disconnected.


 * Textures
 * Removed the unused rooted_vines_head.png texture.
 * Removed stray pixels from the recipe book GUI button.