Java Edition 1.20.3

Minecraft 1.20.3

Edition	Java Edition
Planned release date	?
Development versions	Snapshots (3) (View all)
◄◄ 1.20 ◄ 1.20.2 1.21 ►►

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1.20.3 is an upcoming minor update to Java Edition, with no set release date, which improves shields, adds new functionality for decorated pots, changes chat component serialization, and fixes bugs.

Additions

General

Experiments

• Added the "Update 1.21" experimental toggle (update_1_21 data pack).

Game rule

• Added playersNetherPortalDefaultDelay to control time (in game ticks) that a player needs to stand in a nether portal before changing dimensions, while in Survival and Adventure mode. Defaults to 80.
• Added playersNetherPortalCreativeDelay to control time (in game ticks) that a player needs to stand in a nether portal before changing dimensions, while in Creative mode. Defaults to 1.
• Added projectilesCanBreakBlocks, to control whether impact projectiles will destroy blocks that are destructible by them (i.e. chorus flowers, pointed dripstone and decorated pots). Defaults to true.

Loading screen

• Added a new screen for handling corrupted level files.
  • It gives the player the option to restore a backup, and a quick link to the bug tracker for reporting a bug about it.

Options

• Added "Hide Splash Texts" in accessibility options, which allows the splash in the main menu to be hidden.

options.txt

• Added hideSplashTexts, defaults to false.

Particles

• Added new dust_plume and white_smoke particle types.

Tags

• Added following damage type tag:
  • #can_break_armor_stand: contains player_attack, and player_explosion.
    • Used for damage types that can incrementally knock down armor stands.
• Added following entity tags:
  • #can_breathe_under_water: contains #undead, axolotl, frog, guardian, elder_guardian, turtle, glow_squid, cod, pufferfish, salmon, squid, tropical_fish, tadpole, and armor_stand.
    • Used to disable drowning.
  • #undead: contains #skeletons, #zombies, wither, and phantom.
  • #zombies: contains zombie_horse, zombie, zombie_villager, zombified_piglin, zoglin, drowned, and husk.

Changes

Blocks

Decorated Pot

• Now can store items, up to a single stack of items.
  • Hoppers, minecart with hoppers and droppers can now insert and/or extract items from them.
  • Comparators can now read the number of items in them.
  • Players can interact with them and insert items into them.
    • Player interactions with them cause them to wobble and trigger a vibration frequency of 11.
  • They have no GUI, and need to be broken to retrieve their content by players.
• Now can be smashed by projectiles, which cause them to shatter and drop their contents.
• Now can stack up to 64.
• Now, when blockstate cracked set to true, decorated pots will always shatter when broken.
• Now appears in the Redstone tab of the Creative inventory.

Non-mob entities

General

• The name of them will now be shown if looked at and a CustomName is set, or always displayed if CustomNameVisible is set, similar to living entities.

Command format

Function

• /function command has been changed to better accommodate new /return command.
• Functions no longer have any result unless they use /return or there was error during lookup or instantiation.
  • That means /function command will no longer return (or even display) the number of commands run during execution.
  • Error conditions:
    • Calling non-existent function.
    • Calling empty function tag.
    • Macro instantiation failure.
• "Result" in this context means values that would be stored with /execute store.
• The previous behavior where every command in a function would perform store if a function was called with /execute store ... run function is removed.
  • That means that a single call to function will store at most once (zero times if /return was not called).
  • For function tags with multiple entries, function results will be accumulated, but partial results will be stored at the end of every function.
• Existing limits for functions have been refined to accommodate new execution rules and prevent a wider range of exploits:
  • Limits apply even if run from command line (so it will now always behave as if they were placed in a function).
    • For example, all functions called by /execute as @e run function will count towards the same limit.
    • Executions from command blocks still count as separate ones.
  • Limit maxCommandChainLength for functions will now count "operations" like:
    • Execution of command for a single context.
    • Execution of a stage in /execute (no matter how many contexts were modified).
    • Invocation of function.
  • A new limit with game rule maxCommandForkCount now restricts the total amount of context that can be created by single state of functions like /execute.
    • Example: if there are 5 entities in world, /execute as @e creates 5 contexts, while /execute as @e at @e creates 5*5 = 25 contexts.

/execute

• Re-added (if|unless) function subcommand.
  • A new execute sub-command that runs a function or function tag and matches the return value(s). If a tag is given, all functions run regardless of the results of prior functions.
  • Syntax: /execute (if|unless) function <function> -> [execute]
  • Arguments:
    • function: The function or tag to run.
  • The matching of the result value of the function(s) that run:
    • At least one of the functions must succeed for the match to succeed.
    • A successful call is defined as a function that:
      • Uses the /return command to return a value.
      • The return value is not 0.
    • If no functions exited with /return, neither if nor unless will run.

/return

• Re-added run subcommand: /return run <command>.
  • This takes the result value from running the specified command and returns that as the return value of the function.
    • If command did not return any value (like, for example, call to a function without /return), /return will not execute and function will continue execution.
    • If the given command fails, the return value is 0.
    • In all other aspects, it works like /return with a specified return value.
    • In case of fork (for example /return run execute as @e run some_command), the first execution of the command will return.
      • If there are no executions (for example in /return run execute if @e[something_impossible] run some_command), function will not return and will continue execution.

Items

Shield

• When a player is blocking with a shield, the arm with the shield now follows the direction the player is looking at, when viewed from third person perspective.

General

Custom structure

• Changes to structure type definitions (data/minecraft/worldgen/structure):
  • Added optional pool_aliases list to jigsaw structures.
  • Aliases represent the possibility to rewire jigsaw pool connections by redirecting pool references on individual structure instances.
  • Alias variants are represented in type and is one of:
    • direct: 1:1 mapping from an alias to a new pool.
      • alias: Pool to replace.
      • target: Pool to replace with.
    • random: 1:n mapping where a pool from n is randomly selected for the structure instance.
      • alias: Pool to replace.
      • targets: Randomized list of candidate pools to replace alias with.
    • random_group
      • groups: Each group is a randomized list of above alias types.
      • Only one group is selected per structure instance.
      • This enables modelling selections such as "if pool X is replaced with X1, also replace pool Y with Y1".

Data pack

• The version is now 21.

Entity format

• In NBT format for entity type tnt:
  • Added block_state.
    • This field allows replacement of rendered block model.
  • Renamed Fuse to fuse.

Raw JSON text format

• Plain-text chat components (text, no sibilings, no stylings) are now always serialized as string instead of {"text": "your text"}.
• Chat components now serialize to NBT when sent over network.
  • Components of type nbt now have source field with allowed values: entity, block, and storage.
• Chat components now have an optional type value (allowed values: text, translatable, score, selector, nbt, and keybind) to speed up parsing and improve error checking.
• id field in show_entityhoverEvent style now also accepts UUID as an array of 4 integers.
• Numeric and boolean arguments for translate component are no longer converted to string.
• The following JSON component representations are no longer accepted:
  • null
  • []
• Errors in following style fields are no longer silently ignored:
  • color
  • clickEvent
  • hoverEvent
  • hoverEvent[action=show_entity].contents.name
  • hoverEvent[action=show_item].contents.tag

Realms

• Realms are now available in Snapshots, Pre-Releases, and Release Candidates.
  • Any player who has an active Realms subscription is eligible to create a free Snapshot Realm.
  • Snapshot Realms will be separate from the regular Realms to prevent any issues from impacting regular Realms.
• The version of the last played world on a Realm is displayed in the Realms list.
• Experiments are available for newly created worlds.

Resource pack

• The version is now 19.
• Added block model, item model and block state definitions for crafter.
• Added GUI container texture and sprites for crafter.
• Added white_smoke particle definition.

Tags

• Added firework_rocket into the impact_projectiles entity tag.
• Added skeleton_horse into #skeletons entity tag.

Experimental additions

Blocks

Crafter

• A variant of crafting table, can be crafted with five iron ingots, a crafting table, two redstone dusts, and a dropper in the crafting table.
• Crafters can be oriented in any direction when placed.
• A pickaxe can increase the speed of mining them.
• Have a user interface similar to crafting table.
  • Have 3×3 interactable crafting grid.
  • Their crafting grid slots are toggleable, meaning that the player can change the behavior of a slot by clicking or pressing on a slot with an empty hand.
    • A toggled slot cannot hold any items and therefore cannot have items placed into it by other blocks such as hoppers and droppers.
    • A toggled slot can be toggled off by player, whether clicked directly or holding item(s), pressing slot keys associated with an empty or a not empty hotbar slot.
  • Unlike the crafting table, the slots display a preview of the crafted item which will be crafted and ejected on the next redstone pulse, but cannot be manually taken out by the player.
  • The user interface is shared between all players interacting with them, meaning that multiple players can interact with them at the same time, similar to chests and hoppers.
  • The user interface does not have a recipe book to provide help, so the player must know the recipes.
• The crafter ejects one crafted item at a time when powered by a new redstone pulse, a redstone signal that is not a continuous signal.
  • Upon receiving this new signal, crafters eject the recipe result from the front face.
  • All the result items will be ejected together when the output result has multiple type of items.
• They can interact with hoppers and droppers, to input/output automatically.
  • Hoppers can be used to both insert and pull items out of them.
  • Droppers can be used to insert items into them.
  • Moving items in from another block with a hopper or a dropper prioritizes filling items into slots, by following these rules:
    • If there is a toggled slot, skipped.
    • If there is not a toggled slot, crafters prioritize the first empty slot from left-to-right and top-to-bottom.
    • If there is not a toggled slot, and there are no empty slots, crafters prioritize the smallest stack of the same item. If there are multiple possible stacks, pick the first from left-to-right and top-to-bottom.
  • If failed to select a slot, hoppers and droppers will not take any action.
• When read by a redstone comparator, the redstone signal strength is 0 to 9, where each non-empty or toggled slot adds 1 strength.

Experimental changes

General

Tag

• Added crafter into mineable/pickaxe, and needs_stone_tool block tags.

Fixes

53 issues fixed

From released versions before 1.20

• MC-16937 – Shooting an arrow into the nether portal can hurt anybody when PvP is disabled.
• MC-47607 – Barrier particles aren't shown if particles are set to minimal.
• MC-50319 – Player owned projectiles lose their player ownership when exiting portals.
• MC-50647 – Slime mob spawners spawn slimes only in slime chunks.
• MC-78314 – (Marker) Armor stands create bubbles in water.
• MC-81656 – Field determining whether or not a wither skull is blue is not saved to and read from NBT.
• MC-114761 – Area effect cloud applies effect to dying mob.
• MC-118403 – Vexes summoned by evoker do not have evoker team applied.
• MC-143266 – Nested function calls reevaluate maxCommandChainLength before queueing commands.
• MC-143269 – Nested intermediate functions are skipped when maxCommandChainLength commands are already queued.
• MC-172398 – Fire texture renders according to the player's rotation in the player inventory.
• MC-189227 – First time tutorial uses old textures.
• MC-189261 – Various Realms buttons and texts are incorrectly capitalized.
• MC-198113 – Incomplete commands do not prevent functions from loading.
• MC-221558 – Light particles aren't shown if particles are set to minimal.
• MC-223774 – Firework Rockets can't be used to break Chorus Flowers.
• MC-225364 – Chorus flowers can be destroyed by projectiles in adventure mode.
• MC-225365 – Pointed dripstone can be destroyed by tridents in adventure mode.
• MC-227255 – Beehives and bee nests do not rotate/mirror correctly in structure blocks.
• MC-232719 – The scroll bar within the singleplayer menu doesn't reset its position to the top of the list when searching for worlds.
• MC-233276 – You can feed adult donkeys, horses, llamas or mules with maximum Temper value, and hand animation is not played.
• MC-234323 – Performance issue with text parsing.
• MC-234483 – Some strange pixels can be seen on the left side of world slot frames within several realms menus.
• MC-236341 – You can feed hay bales to adult donkeys, horses or mules, and animal eating animation/sounds are not played.
• MC-236501 – Renamed minecarts and boats don't show their name tag in the world.
• MC-236946 – Shield attack vector is normalized incorrectly.
• MC-249408 – Boats with Chests lose their name when placed.
• MC-253819 – Bells don't rotate correctly when loaded by structure/jigsaw blocks.
• MC-254850 – An operator can kick a host of a LAN world.
• MC-255173 – Nether portal teleportation is inaccurate at large coordinate values.
• MC-257786 – The game takes a long time to process players leaving realms groups or accepting or declining realms invitations.
• MC-260576 – Incomplete /execute summon command still runs.
• MC-262027 – Result consumer created by /execute store is invoked for every command within a function.
• MC-262105 – Entities can block brushing actions when players look very close to their hitboxes.
• MC-263123 – Mending incorrectly calculates overflow after full repair.

From 1.20

• MC-261682 – Brushing can continue when block goes out of range.
• MC-262888 – Clicking "I know what I'm doing!" on the world loading screen when loading a world in a new snapshot is way too loud.

From 1.20.1

• MC-263575 – When an item is extracted from suspicious sand/gravel, gravity does not work on this block.
• MC-263660 – "Sign wobbles" subtitle is the same for signs and hanging signs, causing translation issues.
• MC-264748 – GLX._initGlfw Treats Pointer as a String.
• MC-265353 – Clocks and Compasses in Item Display Entities don't show correct time/direction.

From 1.20.2

• MC-264595 – /return command cannot run function when inside another function.
• MC-264699 – Functions return the output of commands only if the command doesn't start with /return run.
• MC-264710 – /execute if function always fails and /execute unless function always succeeds if run from a function.
• MC-264880 – Gui slider uses new texture with programmer art.
• MC-264966 – Signature is missing from Property texturesappears in the logs of some Minecraft worlds due to player heads.
• MC-265462 – Sending resource pack during play phase shows loading terrain screen for a long time.
• MC-265515 – The "You don't seem to have a Realm" element in the realms menu cannot be selected via the mouse cursor.
• MC-265516 – The "Cancel" button within some realms menus can be deselected using keyboard navigation despite it being the only element within the said menu.
• MC-265517 – The "Buy a realm!" button is automatically selected when opening the "Add Realm" interface.
• MC-265519 – Game minimizes when certain areas of the screen are clicked on Mac in fullscreen mode.
• MC-265551 – "No pending invites!" tooltip in Realms is now untranslatable.
• MC-265589 – Brigadier exception can be repeatedly logged if command has invalid syntax.