Java Edition 1.20.5 Pre-Release 1

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1.20.5 Pre-Release 1 (known as 1.20.5-pre1 in the launcher) is the first pre-release for Java Edition 1.20.5, released on April 10, 2024,^[1] which adds new advancements and fixes bugs. This is the first pre-release released in 2024.

Advancements

• Added the following advancements:
  • Isn't it Scute?
    • Get armadillo scutes from an armadillo using a brush.
  • Snip it!
    • Remove wolf armor from a wolf using shears.
  • Good as New
    • Repair a damaged wolf armor using armadillo scutes.
  • The Whole Pack
    • Tame one of each wolf variant.

Loot functions

• Added modify_contents.
  • Apply modifier function to every item inside a component.
  • If component does not exist, it is not added.
  • Fields:
    • conditions - list of conditions to filter this function.
    • component - target component.
      • Allowed values: container, bundle_contents, charged_projectiles.
    • modifier - function or list of functions to be applied to every item inside container

• Added set_item.
  • Replaces item type of item stack without changing count and components.
  • Fields:
  • conditions - list of conditions to filter this function.
    • item - new item type.

• Added filtered.
  • Applies sub-function only to items that match item predicate.
  • Fields:
    • conditions - list of conditions to filter this function.
    • item_filter - item predicate used to match items.
    • modifier - functions to apply to matching items.

• Added set_custom_model_data.
  • Sets custom_model_data component.
  • Fields:
    • conditions - list of conditions to filter this function.
    • value - integer number provider.

Tags

• Added Entity Type tag minecraft:punchable_projectiles for projectiles which should be able to be punched and deflected toward the direction the player is looking.
• Added Enchantment tag minecraft:tooltip_order controlling which order Enchantments are listed in tooltips.

Written book

• The limit on the amount of pages for a written book has been removed.

Effects^[2]

• Infested
  • Now has a 10% chance to spawn 1-2 silverfish instead of 5%.
  • Silverfish now spawn at the center of the entity's bounding box and fling out in the direction the entity is facing.
• Oozing
  • Only spawns slimes in a given 5x5x5 area up to the max entity cramming count.
• Weaving
  • Now more consistently spawns 2-3 cobwebs on death.
  • Players are now affected by the movement buff through cobwebs, affecting 50% of their normal speed instead of 25%.

Item sub-predicates

• General rules of component predicates:
  • Unless otherwise specified, a field in predicate with the same name as a field in component that matches (i.e. has the same name as predicate) matches that field value
  • Those fields usually have the same type as in the components, but are optional.
  • Exceptions:
    • List fields are replaced with collection matchers (see below)
    • Integer and float fields are replaced with ranges
    • Registry ids are replaced with a type that accepts id, list of ids or a tag
• Collection matcher is a shared part of predicate used for matching collections. Every instance of this matcher has same fields with same functionality, with only difference being type of matched elementFields:
  • size - integer range to match against collection size
  • contains - a list of element predicates
    • All conditions must match for predicate to pass
    • Not all elements in tested container have to be matched
    • Elements can be in any order
    • Single element can match multiple predicates
    • Examples (when matching item stacks):
      • {contents:[{item:diamond}]} - matches when there is at least one diamond item
      • {contents:[{item:diamond}, {item:dirt}]} - matches when there is at least one diamond item and at least one dirt item
  • count - a list of matchers on element counts
    • Entry fields:
      • test - element matcher
      • count - optional integer range to check against number of elements passing test
    • Examples (when matching item stacks):
      • {count:[{count:3,test:{items:diamond}}]}} matches only when there are exactly 3 stacks of diamonds (no matter the stack size)

Loot functions

• Changed set_contents.
  • Unused field type has been removed
  • Added new mandatory field component:
    • Describes target component to be filled with items
    • Existing contents are replaced
    • Allowed values: container, bundle_contents, charged_projectiles
    • bundle_contents and charged_projectiles ignore empty stacks
• Changed set_custom_data.
  • Field tag now accepts both SNBT data written as a string (existing format) and unflattened tags.

Data pack

• Data pack version is now 39.
• Added new item sub-predicates.
• Added new terrain adaptation type for structures: encapsulate
  • Density is added all around every piece of a structure
  • Ideal for structures that need to be entirely covered underground
• The combination of max_stack_size and max_damage components is no longer allowed in commands and data pack definitions
• Added a new option body in entity equipment sub-predicate to match the item in the body armor slot of an entity
• The saturation_modifier field on the food component has been replaced with saturation
  • saturation is the exact value added to the player's saturation level
  • In respect to the former saturation_modifier, this is defined by saturation = nutrition * saturation_modifier * 2
• Changed optional equipment_loot_table field in the SpawnPotentials of Monster Spawners and spawn_potentials of Trial Spawner configs.
  • Now named equipment instead of equipment_loot_table
  • Format: object with fields
    • loot_table - A loot table used to generate the equipment
    • slot_drop_chances - An optional map of equipment slot to specified drop chance
      • Can also be a single value instead of a list to apply to all slots: e.g. slot_drop_chances: 0.0f applies a chance of 0% to all slots
  • e.g. equipment: {loot_table: "minecraft:equipment/trial_chamber", slot_drop_chances: {"head": 0.0f, "chest": 0.25f, "legs": 1.0f, "feet": 0.25f}}
  • If present, rolled items from the specified loot table are equipped to the mob that spawns.

Languages

• Added support for Viossa language.

Particles

• Particle options in commands and in fields like Particles in Area Effect clouds now use the same representation as worldgen files (like existing biomes' ambient particle settings)
• For example, command /particle minecraft:dust 1.0 0.0 0.0 2.0 ... becomes /particle minecraft:dust{color:[1.0, 0.0, 0.0], scale:2.0} ...
• The syntax for particles without extra options (like minecraft:villager) remains unchanged
• Changes to block particles (minecraft:block, minecraft:block_marker, minecraft:falling_dust, minecraft:dust_pillar) options:
  • Field value has been renamed to block_state
  • Field block_state now also accepts plain block name to represent default block state
  • Example transformations:
    • minecraft:block minecraft:redstone_lamp[lit=true] -> minecraft:block{block_state: {Name: "minecraft:redstone_lamp", Properties: {lit: "true"}}}
    • minecraft:block minecraft:diamond_block -> minecraft:block{block_state: "minecraft:diamond_block"}
• Changes to minecraft:item options:
  • Field value has been renamed to item
  • Field item now also accepts plain item name to represent item stack with default components
  • count field is now ignored
  • Example transformations:
    • minecraft:item minecraft:dirt -> minecraft:item{item: {id: "minecraft:dirt"}}
    • minecraft:item minecraft:dirt -> minecraft:item{item: "minecraft:dirt"}
• Changes to dust_color_transition options:
  • Field fromColor has been renamed to from_color
  • Field toColor has been renamed to to_color
  • Example transformation: dust_color_transition 1.0 0.0 0.0 0.5 0.0 1.0 0.5 -> dust_color_transition{from_color: [1.0f, 0.0f, 0.0f], scale: 0.5f, to_color: [0.0f, 1.0f, 0.5f]}
• Changes to entity_effect options:
  • Field value has been renamed to color
  • Field color now also accepts list of floats representing RGBA color

Tags

• Removed Item tag minecraft:tools (overlapping with minecraft:breaks_decorated_pots), moving previous contents into that tag.

Advancements

• Added the following advancement:
  • Revaulting
    • Unlock an ominous vault with an ominous trial key.

Trial chambers

• More consistently buried by terrain when found underground.
• Remade chamber_6 with variations, and renamed it to assembly.
• Added a new trap dispenser style to chambers.
• Fixed various broken jigsaw connections in the corridors.
• Chamber 'Eruption':
  • Stopped tuff bricks from spawning in the air.
  • Added more lights to quadrants.

Ominous trials

• Mobs that can wear equipment now often spawn with enchanted weapons and armor.
  • Armor enchantments include Protection IV, Projectile Protection IV and Fire Protection IV.
  • Weapon enchantments include Sharpness I, Knockback I, Power I and Punch I.
• Mobs that wear equipment no longer have a chance to drop their equipment on death.
• Players are now chosen 50% of the time when an ominous trial spawner chooses which entity to drop projectiles on top of.
• Projectiles now spawn more accurately above chosen entities.

Tags

• Added mace to the #breaks_decorated_pots item tag.
• Added wind_charge, and breeze_wind_charge to the #punchable_projectiles entity type tag.
• Added wind_burst, density, and breach to the #tooltip_order enchantment tag.

57 issues fixed

From released versions before 1.20

• MC-107353 – Ghast fireballs move incorrectly when hit with Knockback enchantment.
• MC-165435 – Can't trigger flying mode in Creative while standing in the middle of 2×2 magma block bubble column.
• MC-188497 – AngerTime and AngryAt cannot be set on summon.
• MC-207353 – Ghast fireballs and wind charges can't be redirected in melee if the attack does 0 damage.
• MC-229209 – Loot table function set_count doesn't work with unstackable items anymore.

From 1.20

• MC-263315 – Attack target of hoglins/zoglins can't be detected by /execute on target.

From 1.20.1

• MC-264456 – Entity targeted by frogs and axolotls can't be detected by /execute on target.
• MC-265390 – /forceload command provides wrong output.

From 1.20.4

• MC-268000 – The client crashes when using /give to give players a skull.
• MC-269496 – You don't get any damage if you fight against the breeze in a minecart or in a boat.

From the 1.20.5 development versions

• MC-267934 – Sending ClientboundTransferPacket followed by disconnect just kicks the player.
• MC-268346 – Jump can be used with generic.jump_strength set to 0 resulting in a speed boost.
• MC-268947 – Flying cannot be initiated reliably when the minecraft:generic.gravity attribute is increased.
• MC-269191 – Old villagers can't trade.
• MC-269192 – Breeze is not affected by the '/execute on target' command.
• MC-269266 – Area effect cloud particles from creeper explosions are incorrectly tinted.
• MC-269320 – Books with more than 100 pages get cut off when upgraded.
• MC-269357 – Flow and guster banner pattern descriptions display as raw translation strings.
• MC-269366 – Mace doesn't break decorated pots unlike other tools.
• MC-269501 – The text above the hotbar has no background, even when the "Text Background" setting is "Everywhere" in Spectator mode.
• MC-269508 – Player keeps vertical momentum when jumping when landing on the ground from sonic boom.
• MC-269609 – Wind charges can harm the ender dragon while it perches atop the end portal, unlike arrows and tridents.
• MC-269610 – Wind charges have the capability to harm the wither when it has reached half health or less.
• MC-269680 – Game crashes when trying to save after modifying item stack to have a max_stack_size below its current stack size.
• MC-269707 – Brewing stand slots have artificial maximum stack size of 64.
• MC-269765 – Mace damage does not reset after a hit while still falling.
• MC-269933 – limit_count item modifier can create overstacked items.
• MC-269947 – Clicking spam with mace causes very high damage.
• MC-269948 – The subtitle for the "minecraft:event.mob_effect.raid_omen" sound event displays as a raw translation string.
• MC-269949 – New "Raid Omen" effect texture is using Programmer Art evoker as base.
• MC-269954 – Striking non-living entities with a mace enchanted with Wind Burst propels the player upward, even when they are flying.
• MC-269955 – When flying in Creative mode, hitting ender dragons with a mace enchanted with Wind Burst pushes the player upward, unlike when attacking other mobs.
• MC-269959 – "Not a list" printed to console when loading into a world.
• MC-269963 – Bad Omen is not removed when experimental features are disabled.
• MC-269974 – Mobs with the Weaving effect, when dying, are unable to replace replaceable blocks with cobwebs.
• MC-269976 – Wind Burst book available from villager trading.
• MC-269977 – Wind Burst enchantment is obtainable in enchanting table.
• MC-269980 – Wind Burst enchantment triggers from normal attacks rather than smash attacks.
• MC-269986 – Inactive ominous trial spawner's top texture is mirrored.
• MC-269993 – Hitting wind charges using mace with Wind Burst creates very high upwards momentum.
• MC-269999 – Potions of Infestation, Oozing and Weaving can be obtained without experimental features enabled.
• MC-270001 – The particle 'minecraft:item minecraft:air' crashes the client.
• MC-270004 – Giving yourself an item with a Wind Burst enchantment level higher than 3, then hitting certain entities crashes the game.
• MC-270005 – Mace smash attack can be done multiple times from a single fall.
• MC-270046 – Mace's unique enchant is ineffective or no further effect if the level higher than max level, and causes error to be logged for wind burst.
• MC-270048 – Vault textures are inconsistent.
• MC-270060 – The glowing parts of trial spawner textures are inconsistent.
• MC-270094 – Fletcher sells new tipped arrows without experimental features enabled.
• MC-270099 – Killing a mob with Weaving effect places cobwebs even if mobGriefing is disabled.
• MC-270119 – The contents slot for the /item command does not function with shot arrows, tridents, and fireballs.
• MC-270125 – Wind Burst can be obtained from chest and fishing loot.
• MC-270161 – Wind Burst enchantment is significantly stronger on vehicle entities.
• MC-270201 – Fishing rod line does not account for the scale attribute in third-person.
• MC-270236 – area_effect_cloud and lingering potions causing potion_contents.custom_color to be slightly transparent.

From the previous development version

• MC-270387 – Wind burst can launch the player when deflecting ghast fireballs.
• MC-270412 – Wind charge item crash on non-experimental worlds.
• MC-270475 – Container component slot -1 crash.