Minecraft:Java Edition 21w10a

21w10a is the thirteenth Minecraft:snapshot for Minecraft:Java Edition 1.17, released on March 10, 2021,<ref>Template:Snap</ref> which adds Minecraft:lush caves and new Minecraft:deepslate variants.

Additions

Blocks

File:Cracked Deepslate Bricks JE1 BE1.png Minecraft:Cracked deepslate bricks

• A cracked variation of Minecraft:deepslate bricks.
• Obtained by smelting deepslate bricks.

File:Cracked Deepslate Tiles JE1 BE1.png Minecraft:Cracked deepslate tiles

• A cracked variation of Minecraft:deepslate tiles.
• Obtained by smelting deepslate tiles.

Template:Animate Deepslate ores

• Added deepslate ore variants for copper, emerald and coal ore.
  • Do not generate by default; they only have been added for use by creators of maps and data packs.
  • Like other deepslate ores, they can be used in blasting and smelting recipes like normal ores.
    • Again, like other deepslate ores, they unlock these recipes in the recipe book.

File:Deepslate.png Minecraft:Infested deepslate

• An infested variant of deepslate.

World generation

File:Azalea Tree.png Minecraft:Azalea tree

• Generate above Minecraft:lush caves, either on the surface or underground.
• Consist of Minecraft:azalea leaves (both variants), Minecraft:oak logs and Minecraft:rooted dirt.

Template:BiomeLink

• Currently the biome is only accessible in single-biome worlds.
• Adaptive to the environment: every type of cave generation can be a lush cave.
• Minecraft:Moss blocks cover the floors and ceilings, along with Minecraft:moss carpets and Minecraft:grass on the floors.
• Minecraft:Spore blossoms grow from the ceiling and drip particles.
• Contains Minecraft:clay pools where Minecraft:dripleaf plants grow out of them.
  • Clay pools sometimes generate Minecraft:water sources over Minecraft:air, and the water is suspended and does not flow. This has yet to be fixed.
• Contains Minecraft:azalea bushes (both variants).
• Minecraft:Cave vines with Minecraft:glow berries grow from the ceiling and light up the caves.

General

Minecraft:Shaders

• Are now included for all supported render states.
• Any shader except for the blitting shader can also be replaced in resource packs.
• For now replacing these shaders is not officially supported and the way it works may change in the future.
• Current rendering engine uses a system similar to the post-processing shader pipeline. There are some differences between both systems that cater to slightly different requirements.

Minecraft:Tags

• Added the Template:Cd block and item tags.
  • Contain both the normal and deepslate ores of each ore type.
• Added the lush_ground_replaceable block tag.
  • Contains the #lush_plants_replaceable block tag, clay, and moss block.

Changes

Blocks

Minecraft:Deepslate diamond ore, Minecraft:deepslate gold ore, Minecraft:deepslate iron ore, Minecraft:deepslate lapis lazuli ore, Minecraft:deepslate redstone ore, Minecraft:coal ore, Minecraft:diamond ore, Minecraft:iron ore, Minecraft:gold ore

• The textures of these ores have been changed.
  • Iron ore and deepslate iron ore no longer have streaks, better matching the appearance of other ores.
  • Diamond ore closer resembles deepslate diamond ore.

Minecraft:Cobbled deepslate

• The texture has been changed.
• Can now be smelted back into deepslate.

Minecraft:Deepslate

• Both the top and side textures have been changed.
• Deepslate can now be placed along any axis.
• Textures in caves now generate with a random rotation.

Minecraft:Deepslate bricks and Minecraft:deepslate tiles

• Can now be crafted.

Minecraft:Lava

• Now replaces air below Y=-53.

Minecraft:Lightning rod

• Changelog states they can now be waterlogged, though this is not the case.

Minecraft:Moss block

• Using Minecraft:bone meal on it now spreads moss to blocks on any height.

Items

Minecraft:Spyglass

• The item model has been changed back to a dedicated texture.
  • Similar to Minecraft:tridents, the spyglass still uses a 3d model in the hand.
  • The texture is different from the original item texture.

Mobs

Minecraft:Slime

• The maximum size that slimes can be summoned with is now 128.

World generation

Minecraft:Crack carvers

• Now are much less common.

Minecraft:Fossils

• The fossils in the deepest part of the underground generate with deepslate diamond ore instead of coal ore.

File:21w10a approximate ore distribution.jpg

The new ore generation for 21w10a.

Ore distribution

• Now generates more Minecraft:emerald ore in mountains.
• Now generates more Minecraft:lapis lazuli ore.
• Now generates less Minecraft:copper ore, Minecraft:gold ore, and Minecraft:redstone ore.
• Now generates smaller Minecraft:diamond ore blobs, but slightly more frequent (less diamond ore overall though).
• Now generates less Minecraft:iron ore, and it generates lower down.
  • The deepest iron generation range: previously Y=-64 to -8, now Y=-64 to -32.
  • The middle iron generation range: previously Y=-16 to 80 (most at 32), now Y=-24 to 56 (most at 16).
• Reduced air exposure for Minecraft:coal ore.

Command format

Template:Cmd

• The give command can only give up to 100 stacks of items at a time (e.g. 6400 stone or 100 iron swords)

Template:Cmd

• Can no longer set a player's spawnpoint to areas that are out of the world.

Gameplay

Template:EffectLink

• Glowing is now based on the outline of all layers on an entity, not just the base layer.

General

Game library updates

• Rendering is now using OpenGL 3.2 core profile.
  • All fixed function rendering has been replaced with shader-based rendering.

Minecraft:Splashes

• Changed the splash "OpenGL 2.1 (if supported)!" to "Now on OpenGL 3.2 core profile!"

Minecraft:Subtitles

• Glow item frames have their own subtitles, no longer using the same subtitles as normal item frames.

Minecraft:Tags

• Removed moss block, the #flowers block tag, grass, tall grass, moss carpet, small dripleaf, big dripleaf, big dripleaf stem, and vines from the lush_plants_replaceable block tag.
• Removed the azalea_log_replaceable block tag.