Minecraft Snapshot 23w03a

We're now releasing the first snapshot for Minecraft 1.19.4. This release contains new accessibility functionality, new commands and plenty of bug fixes!

Happy mining!

Changes

• Vexes now use a separate charging animation when empty-handed
• Armor Stands now preserve custom names when placed and broken

Accessibility

• Added an accessibility onboarding screen for players launching the game for the first time
• Added arrow key navigation
• The Resource Pack screen is now keyboard-navigatable
• Auto-Jump is now off by default
• Added a new "Notification Display Time" accessibility option
  • Changes how long notifications such as unlocked recipes, advancements, subtitles and selected item names are visible for

Arrow key navigation

• Menu screens can now be navigated by using the arrow keys
• When navigating with arrow keys, sliders need to be activated by pressing Enter or Space to start changing the value

Technical Changes

• The data pack version is now 11
• Added a network protocol feature for forcing bundle of packets to be processed within same client tick
• Added fallback fields to translate chat components
• Out-of-bound arguments in translate formats are no longer silently ignored
• The clone command now supports cloning to and from different dimensions
• A new string source is now available for the data modify command
• New execute sub-commands

Network Protocol

• Clients now reset their Secure Chat session state when receiving the login packet

Packet bundles

• Added new delimiter packet to clientbound game protocol
• All packets between two delimiters are guaranteed to be processed within same tick
• For security reasons this feature is not supported in serverbound direction

Block Behavior

• Fire burns out faster in certain biomes, and this is now controlled by the increased_fire_burnout biome tag

Mob Spawning

• The only_allows_snow_and_gold_rabbits biome tag has been renamed to spawns_gold_rabbits to match its behavior
• White Rabbit variants are now controlled by the spawns_white_rabbits biome tag
• Fox variants are now controlled by the spawns_snow_foxes biome tag

Mob Behavior

• Snow Golems melting in warm biomes is now controlled by the snow_golem_melts biome tag

Commands

clone

The clone command now supports specifying the source and target dimensions. New syntax:

clone [from <sourceDimension>] <begin> <end> [to <targetDimension>] <destination> ...

Parameters:

• sourceDimension: id of dimension to clone from
• targetDimension: id of dimension to clone to

data

New source available:

• string <entity|block|storage> [path] [start] [end] - reads a value as text, resulting in a string value

New arguments:

• start: Index of first character to include at the start of the string
• end: Index of the first character to exclude at the end of the string

execute

execute if|unless

New conditions available for the execute if|unless sub-command:

• execute if|unless loaded <pos> - checks if the position given is fully loaded (in regard to both blocks and entities)
• execute if|unless dimension <dimension> - checks if the execution is in a matching dimension

Parameters:

• pos: Block position to check
• dimension: A dimension id

execute on

New execute sub-command for selecting entities based on relation to the current executing entity:

• execute on <relation>

Relations:

• vehicle - entity that the executing entity is riding
• passengers - all entities directly riding the executing entity (no sub-passengers)
• controller - entity that is controlling the executing entity (for example: first passenger in a boat)
• owner - owner of the executing entity, if it is a tameable animal (like cats, wolves or parrots)
• leasher - entity leading the executing entity with a leash (might be a leash knot in case of being attached to a fence)
• target - attack target for the executing entity
• attacker - last entity that damaged the executing entity in the previous 5 seconds

If the relation is not applicable to the executing entity or there are no entities matching it, selector returns zero elements.

title

• All time arguments to title times are now time durations and work with t, s and d suffixes

weather

• The duration of the weather change now matches the game's regular weather cycle if not specified
• The duration parameter is now a time duration in ticks and works with t, s and d suffixes
  • To retain existing functionality, you need to add an s suffix to pre-existing commands

ride

New command to allow entities to start or stop riding other entities

Syntax:

• ride <target> mount <vehicle>
  • Makes a single target mount a single vehicle
  • The command will fail if:
    • vehicle is a player
    • target is already riding a vehicle
    • target and vehicle are the same entity
    • vehicle is already a passenger (direct or indirect) of target
• ride <target> dismount
  • Dismounts target from any vehicle it is riding
  • Fails if target is not riding anything

Game Rules

• Added commandModificationBlockLimit, controlling the maximum number of blocks changed in one execution of clone, fill and fillbiome

Chat components

Translation fallback

Added an optional fallback field to translate text components.

• The new field is a string that will be used in place of translation if it is missing
• If fallback is missing, the old behavior (i.e. using the key itself as the translation) is preserved

Experimental Features

Note block interaction

• Mob heads can now be placed on top of note blocks without sneaking

Fixed bugs in 23w03a

• MC-26678 Damage wobble no longer shows direction of incoming damage
• MC-30403 Sprinting isn't canceled when dismounting rideable entities while sprinting
• MC-121048 When an entity dies, the combat tracker only records the killing blow
• MC-122595 /weather command with duration 0 has the same weather for longer time
• MC-136534 All command blocks think they're facing south with caret notation
• MC-149144 Multiple buttons can be selected by pressing another button and Tab
• MC-155433 Minecart with hopper not picking matching items from a mixed pile
• MC-165595 Guardian beam does not render when over a certain "Time" in level.dat
• MC-181832 The "/spreadplayers" command doesn't spread entities in the specified dimension
• MC-191942 The buttons in the multiplayer menu are not evenly spaced
• MC-222518 Skeleton/Zombie Horse's & Donkey/Mule's saddles and chests are outdated/have errors
• MC-224960 The spectate command does not work between dimensions
• MC-230678 Cauldron fills with powder snow in frozen ocean biome while it's visually raining
• MC-233893 Burning mobs won't get extinguished by rain in warm patches of Frozen Ocean biome
• MC-235260 Hopper minecart at (0, 0, 0) transfers items slower than normal
• MC-247836 Riptide doesn't work in rain within a frozen ocean biome
• MC-252773 Goat Horn without instrument NBT and with other NBT data (such as text) does not play
• MC-255545 Magma Cube shadows do not change with size
• MC-255811 Level#isRainingAt(BlockPos) always returns false for snowy and frozen biomes, even when it is raining
• MC-256292 Goats don't spawn on grass after initial world generation
• MC-256555 Camel sits down for a split second when spawned
• MC-256576 Players become the controlling passengers of unsaddled camels when mounting them while other players are already riding them
• MC-256838 The facing direction of the camel doesn't match
• MC-257082 Sprinting whilst riding an entity or flying with elytra changes your field of view
• MC-257346 Vexes with empty hand make obscene gesture
• MC-257418 Camels sometimes sit down for a split second when receiving damage
• MC-257755 Elements within the realms menu are not selected in order when using the TAB key if you're not currently a member of any realm
• MC-257875 Fire charges aren't consumed when igniting creepers using them in survival or adventure mode
• MC-258163 ClientboundSectionBlocksUpdatePacket serialization breaks after 2^19 block states
• MC-258173 Entering an End Portal whilst sleeping causes the bed to be occupied permanently
• MC-258246 "Telemetry Data" button is missing an ellipsis
• MC-258295 Villager AI broken when workstation is nearby
• MC-258430 Camels with large LastPoseTime values offset the player view model strangely
• MC-258953 Out of memory screen has raw message in the title