🌍🔃 Changes in 21w08a
- Tweaked cave sizes further
- Canyon and cave carvers now apply below y=0
- Cracks can now be found carved into the ground
- Grimstone has been changed into Deepslate
- Added Deepslate ores
- The distribution of ores has been further tweaked
- Andesite no longer generates under y=0
- Tuff now sometimes generates under y=0
- The Tuff layer of amethyst geodes has been replaced with now a new type of stone called Smooth Basalt
- Smooth Basalt is now obtained from smelting Basalt
- Another round of tweaking has been done to the new textures of ores and Blackstone
- Emerald and Lapis Lazuli ore textures have had some touch-ups
- Mineshafts now once again generate in the open air in caves
- Particles now appear in the air around spore blossoms
- Slime Blocks and Honey Blocks have been moved to the Redstone tab of the creative inventory

🐛 Fixed bugs in 21w08a
- MC-213926 - Rooted dirt footstep sounds are considerably quieter than normal dirt footstep sounds
- MC-214782 - Geodes can generate floating in caves
- MC-214843 - Old style caves don't generate past Y=0

🌍New Features in 21w10a

Lush caves biome
- Moss covers the floors and ceilings
- Spore Blossoms grow from the ceiling and drip particles
- Contains clay pools with Dripleaf Plants grow out of them
- Contains Azalea Bushes and Flowering Azalea Bushes
- The Azalea Tree loves to have its roots in lush caves, so if you find an Azalea Tree (either overground or in a cave) you know there is a Lush Cave beneath you
- Cave Vines with Glow Berries grow from the ceiling and light up the caves

🔃 Changes in 21w10a
- Cobbled Deepslate can now be smelted into Deepslate
- Deepslate can now be placed along any axis
- Lightning rods can now be waterlogged
- Fossils in the deepest part of the underground generate with Deepslate Diamond Ore instead of Coal Ore
- The textures of Deepslate and some of the ores have been updated

⚙️ Technical Changes in 21w10a

🐛 Fixed bugs in 21w10a
- MC-29318 - Client misses inventory updates while player is manipulating items - causes invisible items
- MC-84121 - Shape of glow effect is based on mob's base layer
- MC-87019 - Only visible slots are updated clientside when you are inside an inventory
- MC-154094 - Lectern running /clear turns items into ghost items
- MC-175964 - Setblock command run by book in lectern to clear inventory run in command block causes ghost items
- MC-201316 - The /give command can create so many items that the game will freeze
- MC-207818 - Placing a sign from the offhand closes the sign UI immediately
- MC-208301 - /clear does not properly affect the item on the mouse pointer after crafting it
- MC-210408 - /spawnpoint allows players to set their spawnpoint to out-of-bounds coordinates, which crashes the game when trying to respawn
- MC-211666 - Guardians attack invisible axolotls
- MC-212127 - Normal ink sac and glow ink sac are not grouped in the creative inventory
- MC-212144 - Subtitles refer to Glow Item Frame as "Item Frame"
- MC-212168 - Ctrl + Pick Block doesn't copy block state "lit"
- MC-212236 - Cannot visually critical-hit a glow squid (No sound/particles)
- MC-212314 - Glow squid remains dark even if there is a light source block next to it
- MC-212325 - Glow Squid entity data (potion effects, custom name, …) does not get saved
- MC-214629 - FOV decreases when underwater regardless of FOV Effects accessibility setting
- MC-214781 - Lava does not generate at the very bottom of noise caves
- MC-214784 - Fossils can generate floating in caves
- MC-214836 - Water caves cause land to be excessively flooded
- MC-214844 - Bedrock can be exposed to the air at the very bottom of the new caves
- MC-214970 - Phantoms continously make too much flapping sounds
- MC-215194 - Structure blocks do not work below y=0
- MC-215838 - There is currently no way to craft deepslate tiles and deepslate bricks
- MC-215850 - Deepslate Tile Wall comes before Deepslate Brick Wall but Deepslate Bricks come before Deepslate Tiles in creative inventory
- MC-215939 - Emerald ore spawns in lower frequencies than it should above y=100
- MC-216136 - Polished deepslate slab isn't grouped with the other deepslate slabs in creative inventory
- MC-216363 - Crash upon replacing soul sand or magma with the other under a tall bubble column using /setblock
- MC-216735 - Stone Lapis Ore generating in Deepslate
- MC-216736 - Lava lakes generate exposed in caves
- MC-216765 - Coal ore can generate below Y=0 when attached to a fossil
- MC-216817 - Inconsistency: Cobbled deepslate cannot be smelted back into deepslate
- MC-218139 - Spectator vision bug

🌍New Features in 21w11a

Waxing Copper and Oxidization
- Right-click with Honeycomb on Copper Blocks to wax them
- Use honeycomb in a dispenser to wax Copper Blocks
- Axes can scrape off wax and oxidation of Copper Blocks
... and more!

🔃 Changes in 21w11a
- Waxed Copper Blocks can be crafted into 4 Copper Ingots
- Tweaked the cave sizes
- Slightly increased the frequency of Diamond Ore blobs
... and more!

⚙️ Technical Changes in 21w11a

🐛 Fixed bugs in 21w11a
- MC-1483 - Snow covered grass/podzol/mycelium block side texture does not match original block
- MC-12363 - Lava / water / powder snow bucket desync when using it while rapidly turning
- MC-70850 - False negatives during occlusion culling
... and more!

🌍New Features in 21w13a

🐐 Goat
- Goats spawn in Mountains
- Goats can scale the sides of mountains with their incredible jumps!
- Goats can be tempted and bred using Wheat
... and more!

Accessibility
- Added an alternative solid black background color for the Mojang Studios loading screen, toggleable with the "Monochrome Logo" accessibility option

🔃 Changes in 21w13a

Cave Tweaks
- Mineshaft tweak: increased the max length of pillars and chains.
- Carver tweaks: made carvers less likely to be too flat to walk through.
- Noise cave tweaks: Increased likelihood of megacaves (large cheese caves) Reduced likelihood of toothpick pillars (tall 1-block thin pillars) Other tweaks to make the cheese caves more varied and interesting.
... and more!

Ore Distribution Tweaks
- Slightly more iron
- Larger diamond blobs sometimes form

❄️ Powdered Snow
- Powder snow's durability/hardness was slightly increased
- Freeze time has decreased to 7 seconds and hurt frequency has decreased to 2 seconds
- Entities on fire now melt Powder Snow when colliding
... and more!
... and more!

⚙️ Technical Changes in 21w13a

Light block
- Op-only (/give) air-like waterloggable block
- Emits light at a level determined by block state
- Visible and targetable only when the item is held (similar to barrier)
... and more!

🐛 Fixed bugs in 21w13a
- MC-3366 - End portal appears transparent from below
- MC-70738 - Killing guardian with lava does not give cooked fish
- MC-102269 - Polar bears drop raw fish instead of cooked fish when killed with fire or lava
... and more!

🌍New Features in 21w14a

Smeltable Ore Drops
- Ores that are smeltable now drop raw item forms of the ore instead of the ore block and these can be smelted just like before
- This is to prevent cluttering the inventory and have consistency with Fortune on all ores
- Ore blocks from old worlds and silk-touched ore blocks will continue to be smeltable

🔃 Changes in 21w14a
- Fully oxidized Copper can now be waxed

🐛 Fixed bugs in 21w14a
- MC-203854 - Fishing rod texture always looks like it has been cast when in the player's hand
- MC-207173 - Entering only colons into multiplayer Direct Connection & pressing enter crashes the game
- MC-210155 - Command block output no longer is displayed immediately after running a command
- MC-213665 - Crash upon attempting to generate a world with a height of 0 blocks
- MC-214287 - Crash upon entering a nether portal when logical_height is set to 0 and min_y is set to 80 or greater
- MC-215120 - World-gen datapacks can cause crashes when first generating world
- MC-216697 - Having ‘min_y' set to lower than -64 causes either a crash or the world not to behave correctly if the height limit wasn't modified
- MC-217702 - Game crashes (ArrayIndexOutOfBoundsException) during world feature placement / decoration
- MC-219849 - Fishing doesn't animate or render the rod, line or bobber anymore
- MC-220652 - IndexOutOfBound exception hard crash when loading a simple custom dimension datapack
- MC-221553 - The end dimension generates differently than it did previously
- MC-221586 - Excessive pillager spawning in pillager outposts
- MC-221673 - Ocean monuments are completely empty

🌍⛰️ Caves & Cliffs World Generation

⛰️ The Caves & Cliffs Prototype Data Pack
- Download the data pack
- Launch the game, go to the "Create New World" screen, and click the "Data Packs" button
- Drag the downloaded zip file onto the Minecraft window
- The game will ask you if you want to add the data pack – click "Yes"
- Click the play arrow on the data pack that just appeared in the list – this will move it to the list on the right-hand side of the screen
- Click the "Done" button and continue creating your world as normal

New Features in 21w15a
- Goats will ram anything that moves… and also armor stands

🔃 Changes in 21w15a
- A crinkly, crunchy sound now plays when Bone Meal is used
- Reordered some blocks in the Building Blocks Tab in Creative Menu
- Goats will avoid walking on Powder Snow
- Creepers know won't dare mess with Goats
- The main menu background has been updated
- Tweaked the textures of raw ore items
- Just like other ore materials, you can craft a compact version with raw ore items in order to save inventory space

⚙️ Technical Changes in 21w15a

Markers
- Only exist on the server side, are never sent to clients
- Do not do any updates of their own
- Have a data compound field that can contain any data

🐛 /debug function
- Every executed command, message (even if it would be normally invisible), result or error is stored to file
- Cannot be run from inside functions

Chat component separators
- Components that print lists of names, like selector or nbt can now override separator (", " by default) with separator element
- Examples: {"selector": "@e[type=chicken]", "separator": "|"} {"nbt": "CustomName", "entity": "@e[type=chicken]", "interpret": true, "separator": {"text": "*", "color": "red"}}
- {"selector": "@e[type=chicken]", "separator": "|"}
- {"nbt": "CustomName", "entity": "@e[type=chicken]", "interpret": true, "separator": {"text": "*", "color": "red"}}

Custom server resource packs
- A dedicated server can configure additional message to be shown on resource pack prompt (resource-pack-prompt in server.properties, expects chat component syntax, can contain multiple lines)

🐛 Fixed bugs in 21w15a
- MC-203855 - A geode configured_feature causes a crash when use_alternate_layer0_chance is used with no entries in inner_placements
- MC-212145 - Summoning Glow Lichen using /setblock doesn't place any lichen but creates light until the block is updated
- MC-212273 - Glow Lichen doesn't render when being held by an Enderman
- MC-215836 - Deepslate uses the same color as stone on maps
- MC-215844 - Stone still generates around lava pools at low levels
- MC-216588 - Feature placement - java.lang.IllegalArgumentException: bound must be positive
- MC-218588 - Cracked deepslate bricks & tiles are in the incorrect position in the creative inventory
- MC-218698 - Infested deepslate makes the old "stone" sounds
- MC-218705 - Deepslate emerald ore is separated from other deepslate ores in the creative inventory
- MC-218749 - Deepslate coal ore doesn't drop experience
- MC-218944 - Copper ore and deepslate copper ore have inconsistent textures
- MC-219972 - Deepslate gold ore has an inconsistent pixel
- MC-221501 - Water splash potions don't give the axolotl 1.5 minutes of moisture
- MC-221718 - Lava fog repeatedly fails to render each block at certain y-levels
- MC-221798 - Blindness doesn't render correctly
- MC-222104 - Beacon beam fog is incorrectly computed
- MC-222266 - Goats don't attack
- MC-222522 - Nether Gold Ore is no longer smeltable

🌍New Features in 21w16a

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 minecraft days
- A stalactite will only grow up to 7 blocks long
... and more!

🔃 Changes in 21w16a
- Tweaked the texture of raw ores and raw ore blocks

⛰️ Changes to the Caves & Cliffs Preview

⚙️ Technical Changes in 21w16a
- 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)
- The statistic for play time has been renamed to play_time
- There is now a statistic for "Time with World Open" (total_world_time) that also includes the time when the game was paused

🐛 Fixed bugs in 21w16a
- MC-29522 - stat.playOneMinute adds a value of 1 every tick
- MC-55775 - Statistics screen sometimes doesn't show up to date information
- MC-111534 - The firework rocket use statistic doesn't count rockets used for elytra boosting
... and more!

🌍🔃 Changes in 21w17a
- Small Dripleaves can now also be placed on Moss Blocks
- Copper Ore drops 2-3 raw Copper when mined, or more when using a tool enchanted with Fortune
- Copper Blocks are now crafted from 9 Copper Ingots
- Tweaked the texture of raw Metal blocks

⛰️ Changes to the Caves & Cliffs Preview

🐛 Fixed bugs in 21w17a
- MC-170443 - Banner copying recipe ignores existence of other items in crafting grid
- MC-187664 - World border uses float to determine its size, making some border sizes inaccessible, and cannot be set to 30 million or beyond
- MC-201269 - Constantly teleporting player to a phantom crashes the game/kicks the player
- MC-203570 - Candles aren't grouped in the recipe book
- MC-203745 - Repeated teleport between dimensions causes the entity to duplicate on the client
- MC-204031 - Waxed Cut Copper (any level of weathered) have two separate recipes in the recipe book
- MC-214187 - Void platform generates multiple times
- MC-214735 - Horse disappears when dying while riding it and reloading the world while it's unloaded
- MC-214838 - Big dripleaf stem remains after breaking a stem or leaf above it
- MC-214865 - Floating islands world type generates extreme terrain
- MC-219155 - Fishing line only starts on half distance between the fishing rod and bobber (Apple M1 only)
- MC-219840 - You cannot unlock the recipe for Mossy Stone Bricks
- MC-219842 - Recipes for mossy cobblestone and mossy stone bricks aren't grouped
- MC-220033 - (Parity issue) Hanging Roots can't be waterlogged
- MC-221560 - Copper/Coal Ore in Deepslate Patches aren't Deepslate Ores
- MC-222008 - Empty/missing template pool error grammar mistake
- MC-222520 - Raw and Ore smelting previews aren't grouped together
- MC-223055 - Amethyst buds and cluster have an unused blockstate
- MC-223792 - Shrinking world border with center past x/z 29999983 crashes the game

🌍🔃 Changes in 21w18a
- Infested Blocks are no longer instantly destroyed. Instead, they have half the destroy time of their non-infested counterpart.
- Screaming goats will use their ram attack more often than other goats will

⛰️ Changes to the Caves & Cliffs Preview

🐛 Fixed bugs in 21w18a
- MC-3587 - Last use of an anvil causes player to drop their item
- MC-87935 - When closing the inventory while holding an item with the cursor in Creative mode, the item disappears
- MC-125033 - Old cave and ravine generation gets cut off unnaturally on chunk borders near water
- MC-162953 - NativeImage bounds checks are incorrect
- MC-197616 - Certain custom biome settings cause game to spam "Received invalid biome id: -1" in the console, causing major lag or freeze
- MC-204707 - Adventure mode players can extinguish candles
- MC-204969 - No "Burning" sound for items burning in lava cauldron
- MC-205797 - Zoglins attack Marker armor stands and Invisible armor stands
- MC-206560 - Pufferfish react to Marker armor stands and Invisible armor stands
- MC-208430 - Minecraft crashes when loading resource pack due to "tessellating block model"
- MC-208679 - Axolotl inconsistently doesn't show its mouth in-game
- MC-211064 - Loading in a TrueTypeFont with an out-of-bounds size crashes the game
- MC-214159 - Small Dripleaf sometimes shrink into smaller (1 block tall) Big Dripleaf when using bone meal
- MC-214427 - Spore Blossoms can be used to breathe underwater / cannot be waterlogged
- MC-214793 - Some strips of chunks generate completely dark
- MC-214808 - World occasionally fails to load correctly
- MC-214860 - Some chunks in a line are lit up constantly
- MC-214898 - Extreme world generation lag
- MC-215867 - Crash: java.lang.IllegalStateException: Chunk not there when requested
- MC-215946 - Game fatally crashed while exploring chunks (IllegalStateException: Accessing PalettedContainer from multiple threads)
- MC-216148 - Some chunks occasionally don't save properly, resetting progress
- MC-221647 - Goat Babies Don't Follow Parents
- MC-221725 - Legs of goats move differently
- MC-221727 - Goat eye height is outside of its hitbox while airborne
- MC-221840 - Goats can still do high jumps normally when on honey blocks
- MC-222151 - Goat head animation is weird when it rides a boat
- MC-222157 - Eye position of the goat is too high in some cases, causing suffocation
- MC-222458 - UVs on the goat's ears aren't mirrored as they should be
- MC-223141 - Piglins aren't attracted to a Block of Raw Gold
- MC-223145 - Piglins aren't angered when mining a Block of Raw Gold
- MC-223150 - Goats ram Marker armor stands & Invisible armor stands
- MC-223178 - Deepslate Tile Stairs come before Deepslate Brick Stairs in the creative inventory
- MC-223203 - Deepslate ore map colors are inconsistent with deepslate
- MC-223239 - Ramming sound that comes from a baby goat does not change pitch
- MC-223422 - When removing water from base of Small Dripleaf, the block stands without water untill a block update
- MC-224401 - Mob death does not show death particles
- MC-224428 - Raw ore blocks can generate as floating blocks in ore veins

🌍🔃 Changes in 21w19a
- The maximum length of item names in the anvil UI has been increased from 35 to 50
- Made geodes significantly rarer
- Unfinished items (Sculk Sensor, Bundles, and Candles) have been removed from the creative inventory
... and more!

⛰️ Changes to the Caves & Cliffs Preview
- The pack now includes recipes related to bundles and candles

⚙️ Technical changes in 21w19a

Item command
- /item replace <target> with <item stack> [<count>] - same as old replaceitem
- /item replace <target> from <source> [<modifier>] - copies item for source to target(s), optionally applying modifier
- /item modify <target> <modifier> - modifies item (without copying)

🐛 Fixed bugs in 21w19a
- MC-105080 - Ender Dragon is respawned if all Exit End Portal blocks are removed / legacy scanning is done for worlds with new dragon fight
- MC-136647 - Leads don't work with Squids
- MC-200009 - Crash when using a non-mushroom block in a huge mushroom feature's cap
... and more!

🌍🔃 Changes in 21w20a
- Actually made Geodes rarer this time
- GUI narration now includes position and usage of hovered or focused element
- Tilling Rooted Dirt with a Hoe will now convert it into Dirt, and pop out a Hanging Roots item
... and more!

⛰️ Changes to the Caves & Cliffs Preview

⚙️ Technical changes in 21w20a
- Added a new NBT tag for entities - "HasVisualFire" – which will cause any entity with this flag to visually appear on fire, even if they are not actually on fire

🐛 Fixed bugs in 21w20a
- MC-610 - Grass / Flowers / Snow are placed incorrectly in newly created chunks
- MC-102220 - Barrier Blocks are not shown when "Show Invisible Blocks" is selected in Save Structure Blocks
- MC-149777 - Crash when loading world: java.util.ConcurrentModificationException when using Java 11 or above
... and more!

🔗 Minecraft 1.17.1 Pre-Release 2

⚙️ Technical Changes
- Deaths of named mobs are now logged

🐛 Fixed Bugs
- MC-219290: Calcite is too quiet compared to other blocks
- MC-221656: Creative mode obtained Bucket of Axolotl/Tropical Fish only spawns one kind axolotl/tropical fish
- MC-226926: Emerald ore generates too often
- MC-228599: Attempting to walk through flowing water constantly switches the player from swimming into normal mode
- MC-229191: Diamond ore distribution changed between 1.16.5 and 1.17

🔗 Minecraft 1.17.1 Release Candidate 1

🐛 Fixed Bugs
- MC-230716: “death.attack.dryout” and “death.attack.dryout.player” display raw translation strings (are untranslated)

🔗 Minecraft Java Edition 1.17.1

🔃 Changes
- Blue axolotls can now only be obtained through breeding
- Non-screaming goats now have a rare chance to produce a screaming goat when bred
- Status effects on goats now also apply when the goat is jumping or ramming
- Raised the drop rate for copper ingots from Drowned to 11% + 2% per level of looting
- Powder snow now fills cauldrons 2 times faster than before (still pretty slowly, though!)

⚙️ Technical Changes
- Deaths of named mobs are now logged
- In case of DNS-based redirection, the client will send the hostname actually used to connect (this restores the pre-1.17 behaviour)

🐛 Fixed Bugs
- MC-123654: “Sun, moon, and/or clouds are not showing if render distance is below 4”
- MC-131290: “Enchantments are saved as shorts, but are loaded as and function with integer values”
- MC-156155: Turkish lira sign (₺) appears as □ in the game
- MC-194736: Duplicate text mapping for U+00B7
- MC-196999: U+1FEC is wrong in Minecraft’s font