Java Edition 21w17a

21w17a is the nineteenth snapshot for Java Edition 1.17, released on April 28, 2021, which tweaks the raw metal block textures, adds a new type of cave and fixes bugs.

Experimental
Changes have been made to the official Caves & Cliffs world generation preview datapack, which gives early access to the world generation coming in Java Edition 1.18.


 * Noodle caves
 * A thinner, squigglier, tighter variant of spaghetti caves.

Blocks

 * Block of Raw Metal
 * Tweaked the textures of raw iron blocks, raw copper blocks, and raw gold blocks.
 * Can now generate as part of the ore vein.


 * Copper ore
 * Now drops 2–3 raw copper when mined, or more when using a tool enchanted with Fortune.


 * Copper block
 * Are now crafted from 9 copper ingots, instead of 4.


 * Hanging roots
 * Can now be waterlogged, to match the behavior in.


 * Powder Snow
 * Withers are now immune to freezing.


 * Small dripleaf
 * Can now also be placed on moss blocks.

Items

 * Copper
 * Copper blocks can now be crafted into 9 ingots, instead of 4.

Entities

 * Wither
 * Is now immune to freezing.

Experimental
Changes have been made to the official Caves & Cliffs world generation preview datapack, which gives early access to the world generation coming in Java Edition 1.18.


 * Ore veins
 * Are now rarer and slightly smaller.
 * Ores are clumpier and less evenly distributed.
 * Now have a chance to rarely contain a raw metal blocks.