Minecraft: Java Edition - Snapshot 24w12a

Here's snapshot 24w12a with new advancements and several tweaks.

Happy Mining!

EXPERIMENTAL FEATURES

TRIAL CHAMBERS

Trial Chambers now generate slightly more rarely and a bit more spaced out from each other

TRIAL CHAMBERS EXPLORER MAP

Struggle no more to locate a Trial Chamber - level up your nearest Cartographer to Journeyman for the opportunity to trade for an Explorer Map pointing to a nearby Trial Chamber

HEAVY CORE

Can now be waterlogged
Survives lava flows
Most efficient tool is now the pickaxe
Adjusted destroy time and explosion resistance

ADVANCEMENTS

Added the following advancements:
- Minecraft: Trial(s) Edition - Step foot in a Trial Chamber
- Under Lock & Key - Unlock a Vault using a Trial Key
- [Challenge - 40 exp] Blowback - Kill a Breeze with a deflected Wind Charge
- Who Needs Rockets? - Use a Wind Charge to launch yourself upward at least 8 blocks
- Crafters Crafting Crafters - Be near a Crafter when it crafts a Crafter
- Lighten Up - Scrape a Copper Bulb with an Axe to make it brighter
- Over-Overkill - Deal 50 hearts of damage in a single hit using the Mace

TECHNICAL CHANGES

The Data Pack version is now 36
The Resource Pack version is now 30
- Particle entity_effect takes color argument when spawned from command
- /particle entity_effect <r> <g> <b> <a>
- 4 float values ranging from 0.0 to 1.0 representing RGBA

DATA PACK VERSION 36

Added a crafter_recipe_crafted trigger which is triggered when a Crafter ejects a successfully crafted item into the world.
- <player> an entity predicate matching the player who is nearby
- <recipe_id> is the ID of the recipe being crafted
- <ingredients> is a list of item predicates matching the ingredients that form the recipe being crafted
Added a fall_after_explosion trigger which is triggered when a player begins falling after being knocked upwards by an explosion or wind burst
- <player> an entity predicate matching the player who is falling
- <start_position> a location predicate matching the position the player was at when they were hit by the explosion or burst
- <distance> a distance predicate matching how far the player must be from start_position to cause the trigger to activate
- <cause> an entity predicate matching the entity which caused the explosion or burst to happen
Added storage loot number provider to access values from command storage
New Entity Type Tag: sensitive_to_smite - for Entity Types that take extra damage from the Smite Enchantment
Expanded item predicate syntax used in execute if|unless items and clear commands
Removed redundant custom data section ({...}) from item arguments (it's fully replaced by [custom_data={...}])
- To make this transition easier, custom_data item sub-predicate has been changed to allow unquoted SNBT
Added wolf entity sub-predicate for matching wolf variants
wolf, cat, frog and painting entity sub-predicates now accept tags and plain lists instead of just single elements
Changed texture asset paths in wolf_variant to better match other formats
Command arguments that previously accepted namespaced ids of loot tables, modifiers and predicates can now also accept inline definitions
Added new item stack components
Added new loot functions

WOLF_VARIANT DEFINITIONS

Field texture has been renamed to wild_texture
wild_texture, tame_texture and angry_texture no longer require values to be prefixed with textures/ and suffixed with .png

COMMANDS

INLINE LOOT VALUES

Arguments in following commands that previously accepted namespaced ids of loot tables, modifiers and predicates can now also accept inline definitions:

loot
item
execute if predicateValues have same structure as matching JSON files, though they are encoded as SNBT.Example: execute if predicate {condition:weather_check, raining:true}

LOOT TABLES

STORAGE NUMBER PROVIDER

This number provider is able to access numeric values from command storage directly
If selected storage does not exist or tag selected by path is not numeric or does not exist, provider returns 0
Fields:
- storage - namespaced id of command storage
- path - NBT path to field

SET_LORE FUNCTION

The replace field has been removed
Now has mode like set_fireworks and set_written_book_pages

SET_WRITTEN_BOOK_PAGES FUNCTION

pages is now a JSON Object rather than a string containing JSON

TOGGLE_TOOLTIPS LOOT FUNCTION

This function can be used to modify item component tooltip visiblity
It works by setting fields like show_in_tooltip without changing other values
Format:
- toggles - a map of supported item component type to boolean value
Supported components: trim, dyed_color, enchantments, stored_enchantments, unbreakable, can_break, can_place_on, attribute_modifiers
Example:
- {function:"toggle_tooltips","toggles":{"enchantments":false}} will hide enchantments tooltip

FUNCTIONS

Nested lists are no longer supported in function lists

ITEM PREDICATE ARGUMENT

The item predicate syntax (used in execute if|unless items and clear commands) has been significantly expanded.

The general syntax is: <type> [comma-separated list of <test>]
<type> can be one of:
- item id
- item tag id prefixed with #
- * to match any item
<test> can have one of 3 forms:
- <component_id>=<value> - match exact value of component (same as in previous format)
  - <value> is a representation of component value in SNBT format (same as in item give argument)
- <component_id> - check if component exists
- <predicate_id>~<value> - check item sub-predicate
  - <value> is a representation of item sub-predicate in SNBT format (but otherwise same as one used for advancement and loot table JSON files)
  - Example: *[damage~{durability:{min:3}}] will match any stack with at least 3 uses left
The special name minecraft:count can be used for matching the stack size
- count=<positive int> will pass only when the stack size equals the given value
- count~<int range> will pass when the stack size is in the specified range
  - Example: *[count~{max:2}] will match any stack with count <= 2
- count will always pass
Any <test> entry can be negated by prefixing with !
- Example: *[!count=1] will match any stack that has count other than 1
<test> elements can be also joined with | to check multiple alternatives
- Example: *[!damage|damage=0] will look for items without damage component or with 0 damage
The syntax for custom data partial matching ({}) has been removed in favor of using custom_data predicates
- So stick{a:2} becomes stick[custom_data~{a:2}]

PREDICATES

ITEM SUB-PREDICATES

Predicate minecraft:custom_data now accepts both SNBT data written as a string (existing format) and unflattened tags
- That means that *[custom_data~{a:1}] and *[custom_data~"{a:1}"] are equivalent
- Flattened string format has been kept since NBT type information can't be expressed in JSON

ENTITY SUB-PREDICATES

wolf

New wolf sub-predicate has been added to match wolf variantsFields:

variant - wolf variant to match (single entry, list of entries or tag)

cat, frog, painting

Field variant now accepts single entries, list of entries or tags

NEW ITEM STACK COMPONENTS

MINECRAFT:FOOD

When present, this item will behave as if a food (can be eaten)
Format: object with fields
- nutrition: non-negative integer, number of food points to restore when eaten
- saturation_modifier: float, amount of saturation to restore when eaten
- is_meat: boolean (default: false)
  - If true, can be fed to Wolves
- can_always_eat: boolean (default: false)
  - If true, this food can be eaten even if not hungry
- eat_seconds: float (default: 1.6)
  - The number of seconds that it takes to eat this food item
- effects: list of effects to apply when eaten (default: [])
  - effect: effect instance (same format as custom_effects in minecraft:potion_contents component)
  - probability: float between 0 and 1, chance for the effect to be applied (default: 1)
- e.g: food={nutrition:4,saturation_modifier:0.1}
On food items, has an implicit default value for that food type

MINECRAFT:MAX_STACK_SIZE

Controls the maximum stacking size of this item
Format: integer between 1 and 99
- e.g. max_stack_size=4
Has an implicit default value according to the item type (usually 64)

MINECRAFT:MAX_DAMAGE

Controls the maximum amount of damage than an item can take
If not present, the item cannot be damaged
Format: positive integer
- e.g. max_damage=123
Has an implicit default value for damageable items

MINECRAFT:FIRE_RESISTANT

If present, this item will not burn in fire
Format: empty object
- e.g. fire_resistant={}
Has an implicit default value for fire-resistant items such as Netherite

MINECRAFT:RARITY

Controls the color of the item name
Format: enumerated value, one of:
- common (default): white name, or aqua when enchanted
- uncommon: yellow name, or aqua when enchanted
- rare: aqua name, or light purple when enchanted
- epic: light purple name
- e.g. rarity=rare
Special items such as Golden Apples have an implicit default value

MINECRAFT:TOOL

Controls the behavior of the item as a tool
Format: object with fields
- rules: list of rule entries
  - blocks: single block, list of blocks, or #-prefixed block tag to match
  - speed (optional): float, overrides the mining speed if present and matched
  - correct_for_drops (optional): boolean, overrides whether this tool is considered 'correct' if present and matched
    - true will cause the block to mine at its most efficient speed, and drop items if the targeted block requires that
- default_mining_speed: float, mining speed to use if no rules match and override mining speed (default: 1.0)
- damage_per_block: non-negative int, amount of durability to remove each time a block is mined with this tool
- e.g. tool={rules:[{blocks:"#mineable/pickaxe",speed:4.0,correct_for_drops:true}]}
Vanilla tool items will have an implicit default value based on their tier and tool type

HIDE_TOOLTIP

If present, it will completely hide whole item tooltip (that includes item name)
Tooltip will be still visible and searchable in creative mode
Format: empty object

NEW TAGS

Added incorrect_for_wooden_tool, incorrect_for_gold_tool, incorrect_for_stone_tool, incorrect_for_iron_tool, incorrect_for_diamond_tool, incorrect_for_netherite_tool block tags
- These tags combine the existing needs_diamond_tool, needs_iron_tool, and needs_stone_tool tags for each specific tool tier
Added meat collection item tag
- This is not used by the game directly, but may be included by other tags
Added piglin_food, fox_food, cow_food, goat_food, sheep_food, wolf_food, cat_food, horse_food, horse_tempt_items, camel_food, armadillo_food, bee_food, chicken_food, frog_food, hoglin_food, llama_food, llama_tempt_items, ocelot_food, panda_food, pig_food, rabbit_food, strider_food, strider_tempt_items, turtle_food, parrot_food, parrot_poisonous_food item tags to control which items can be fed to or tempt the corresponding mobs
axolotl_tempt_items has been renamed to axolotl_food

RESOURCE PACK VERSION 30

Map decoration icons have been split from the former map_icons.png to use an atlas loaded from the textures/map/decorations/ directory
The process of upgrading your pack can be assisted by using this automated Slicer tool
Added trial_chambers map decoration icon

FIXED BUGS IN 24W12A

MC-266467 - Wind charges stutter when flying through the air
MC-267747 - Click and hover events don't work when viewing chat while F1 is enabled
MC-267933 - Silk Touch and Fortune enchanted books cannot be found in Creative inventory
MC-267943 - Anvil exclusive enchantments can be obtained from enchanting tables
MC-268068 - Pieces of text in the "Reset World" realm menu can intersect when using some resolutions
MC-268171 - Some GUI textures can no longer be transparent in Minecraft
MC-268311 - Bane of arthropods enchantment uses #arthropods tag instead of #sensitive_to_bane_of_arthropods
MC-268312 - Impaling enchantment uses #aquatic tag instead of #sensitive_to_impaling
MC-268343 - Breeze charge has laggy unnatural flightpaths when punched
MC-268510 - Items with "Unbreakable:1b" NBT can no longer have the unbreaking enchant applied
MC-268556 - Wind charges go through non-full blocks instead of colliding
MC-269083 - Effect background texture in inventory renders translucent pixels as opaque
MC-269085 - Experience bar and jump bar render translucent pixels as opaque
MC-269169 - Wolf variant not present in advancement criteria
MC-269268 - components don't work on the smithing table
MC-269280 - The right side of incompatible resource or data packs isn't rendered correctly when the scroll bar is present
MC-269299 - The red text within the "Experiments" menu cannot be narrated or selected
MC-269336 - Crash with set_enchantments item modifier above level 255
MC-269354 - The subtitle for the "minecraft:item.mace.smash_air" sound event displays as a raw translation string
MC-269355 - Heavy Core has no required tool
MC-269356 - Heavy Core cannot be oriented despite its blockstates suggesting otherwise
MC-269361 - Weird Wind Charge behavior when deflecting
MC-269373 - /datapack disable doesn't work
MC-269393 - Game crashes when wind charge hits entity
MC-269401 - The minecraft:set_written_book_pages item modifier is inconsistent with minecraft:set_name and minecraft:set_lore
MC-269409 - Unable to execute /particle entity_effect
MC-269419 - Heavy Core cannot be waterlogged
MC-269422 - Carpet on powder snow no longer negates fall damage
MC-269452 - Crash when using item modifier with replace_section mode and very large size field
MC-269457 - Crash with set_lore item modifier setting more than 256 lores
MC-269513 - Maces can break cobwebs

AR PACK VIP