Java Edition 24w34a

Minecraft 24w34a
Edition	Java Edition
Release date	August 21, 2024
Type	Snapshot
Snapshot for	1.21.2
Downloads	Client (.json); Server
Obfuscation maps	Client; Server
Protocol version	dec: 1073742030; hex: 400000CE
Data version	4060
Resource pack format	36
Data pack format	50
Minimum Java version	Java SE 21

This page covers a development version that has a critical issue under certain conditions.

Using a bucket in most cases deletes the bucket.

24w34a is the second snapshot for Java Edition 1.21.2, released on August 21, 2024.^[1] It contains some tweaks to experimental features, as well as some technical changes and optimizations.

Additions

Command format

Data component format

Added minecraft:consumable item stack component.

[NBT Compound / JSON Object] minecraft:consumable: If present, this item can be consumed on use.
- [Float] consume_seconds: The amount of seconds it takes for a player to consume the item. Defaults to 1.6.
- [String] animation: The animation used during consumption of the item. Must be one of none, eat, drink, block, bow, spear, crossbow, spyglass, toot_horn or brush. Defaults to eat.
- [String][NBT Compound / JSON Object] sound: Sound event, the sound used during and on completion of the item's consumption. Defaults to entity.generic.eat.
  - A sound event see Template:Nbt inherit/sound event/template
- [Boolean] has_consume_particles: Whether consumption particles are emitted while consuming this item. Defaults to true.
- [NBT List / JSON Array] on_consume_effects: An optional list of effects which take place as a result of consuming this item.
  - [NBT Compound / JSON Object]: A single consume effect.
    - [String] type: The kind of consume effect. Must be one of apply_effects, remove_effects, clear_all_effects, teleport_randomly or play_sound.
    - If type is apply_effects:
      - [NBT List / JSON Array] effects: A list of effect instances applied once consumed.
        [NBT Compound / JSON Object]: A single effect.
        [String] id: The ID of the effect.
        
        [Byte] amplifier: The amplifier of the effect, with level I having value 0. Optional, defaults to 0.
        
        [Int] duration: The duration of the effect in ticks. Value -1 is treated as infinity. Values 0 or less than -2 are treated as 1. Optional, defaults to 1 tick.
        
        [Boolean] ambient: Whether or not this is an effect provided by a beacon and therefore should be less intrusive on the screen. Optional, defaults to false.
        
        [Boolean] show_particles: Whether or not this effect produces particles. Optional, defaults to true.
        
        [Boolean] show_icon: Whether or not an icon should be shown for this effect. Optional, defaults to true.
      - [Float] probability: The probability the above effects are applied once consumed. Defaults to 1.0.
    - If type is remove_effects:
      - [NBT List / JSON Array][String] effects: A set of effects removed once consumed, as either a single ID or list of IDs.
    - If type is clear_all_effects: Clears all effects of the consumer.
    - If type is teleport_randomly:
      - [Float] diameter: The diameter that the consumer is teleported within. Defaults to 16.0.
    - If type is play_sound:
      - [String][NBT Compound / JSON Object] sound: The sound event played once when consumed.
        A sound event see Template:Nbt inherit/sound event/template

e.g. consumable={consume_seconds:3.0, animation:'eat', sound:'entity.generic.eat', has_consume_particles:true, on_consume_effects:[{type:'minecraft:clear_all_effects'}]}

Added minecraft:use_cooldown item stack component.

[NBT Compound / JSON Object] minecraft:use_cooldown: If present, this item applies a cooldown to all items of the same type when it is used.
- [Float] seconds: The amount of seconds the cooldown takes place for.
- [String] cooldownGroup^{[note 1]}: Optional namespaced id representing the cooldown group. If present, the item is a part of a cooldown group and no longer shares cooldowns with its base item type, but instead with any other items that are part of the same cooldown group.

e.g. use_cooldown={seconds:1.5, cooldown_group:"minecraft:custom_weapon"}

Added minecraft:use_remainder item stack component.

[NBT Compound / JSON Object] minecraft:use_remainder: If present, replaces the item with a remainder item if its stack count decreases after use.
- A single item stack see Template:Nbt inherit/itemnoslot/template

e.g. use_remainder={id:'minecraft:stick', count:1}

Changes

Items

General

Drinking a milk bucket in Creative mode no longer gives the player an empty bucket.

Mobs

Blaze

Changed the texture for the bottom face of a blaze's rods were changed from to .

Non-mob entities

Projectiles

Arrows, tridents and fishing bobbers^{[note 2]} now bounce on the world border if hit.
Other projectiles such as ender pearls and snowballs no longer go through the world border.

Command format

Data component format

food item stack component
- The food component has been changed to become a data container which only holds the food stats applied when the item is consumed.
  - This component no longer gives it the ability to be consumed, and can be done instead with the new consumable component.
  - Removed the eat_seconds, using_converts_to and effects fields.

Gameplay

Recipe book

Now repeats the last selected recipe when a "selected" key is pressed (space or enter key).

General

Data pack

The pack format version is now 50.

Performance

Framerate has been improved when using higher render distances.
Significantly reduced the performance impact when turning the camera.

Resource pack

The pack format version is now 36.

Shaders

Shader program configurations can now specify preprocessor define directives to apply to their linked shaders.
- Many shader implementations have been merged by making use of this.
The format of core shader and post-processing shader configurations have been consolidated.
The rendertype_entity_glint_direct shader has been removed (replaced by rendertype_entity_glint)
The rendertype_entity_translucent_cull shader has been removed (replaced by rendertype_item_entity_translucent_cull)

Experimental

Bundles

The tooltip now fits 3 rows and can always show at least 8 item types.

Redstone Experiments

Redstone wire updates now have a left-first preference, meaning the left side is updated first if both sides of a fork have equal power.
- This removes most of the random behavior.
- The remaining edge cases which are still random are situations where the wire gets powered from above or below without enough context.

Minecart Improvements

Minecarts no longer forcefully snap to the center of a block when landing on a rail.
- Minecarts snap to corners along the diagonal, and snap after being pushed by a piston.
- This allows for piston bolts and similar contraptions.
Dispensers are allowed to stack minecarts again.
Minecarts now more easily come to rest at opposing slopes.
Minecarts no longer tilt during a short fall, or when they are falling straight down.
Minecarts are now placed (or dispensed) with the correct rotation straight away when put on rails.
- They are also placed with the correct rotation onto slopes.
Minecarts no longer phase through blocks on slopes when going up or down, they collide instead.

Fixes

65 issues fixed

From released versions before 1.21

MC-73178 – Villagers' "CanPickUpLoot" tag cannot be set to zero.
MC-144327 – The bottom face texture of a blaze's rods is the same as their top face texture.
MC-191431 – Player spectator head is invisible/does not render in the inventory after switching to "Fabulous!".
MC-249414 – The "Shader rendertype_entity_translucent_emissive could not find sampler named Sampler2 in the specified shader program." warning is logged in the game output console when launching the game.
MC-269376 – Breeze fires wind charge from center of hitbox.
MC-269715 – Food won't be eaten when the component food.eat_seconds is less than 0.05.

From 1.21

MC-272643 – Items containing using_converts_to cannot be stacked with the original items after restarting the world.
MC-273329 – Drinking milk buckets in Creative mode gives empty buckets.
MC-273629 – Adding effects with an effects_changed advancement causes a packet error (ConcurrentModificationException) if it was triggered by milk.
MC-276936 – Foxes eat soup won't leave the bowl.

From 1.21.1

MC-275998 – Menu blur turns glowing outlines black.

From the previous development version

MC-275203 – Minecarts always spawn facing east/west and move upward slightly when being placed on rails.
MC-275209 – It's impossible to put water in a cauldron underwater.
MC-275210 – Minecarts can phase through blocks when travelling diagonally upwards.
MC-275211 – The enchantment glint isn't visible on dropped items.
MC-275213 – Hand animation still plays when trying to put lava or powder snow in an underwater cauldron.
MC-275218 – "Minecart rolls" sound does not play when on tracks after de-railing then re-railing.
MC-275219 – Hand animation still plays in Creative when trying to use minecarts inside each other on the same rail.
MC-275221 – Baby polar bear model is messed up in 24w33a.
MC-275224 – Minecart items desync when using them on a rail with a minecart above it.
MC-275226 – Enchantment glint is not visible on items held by player and mobs in third-person.
MC-275229 – Minecarts behave strangely on bubble columns.
MC-275230 – The game crashes when opening the inventory while in Spectator mode.
MC-275232 – The mining fatigue animation appears too close.
MC-275236 – Gamerule minecartMaxSpeed doesn't affect downward velocity.
MC-275237 – Cannot rename written book in an anvil.
MC-275241 – Minecarts continue to produce sound for a short while after being stopped.
MC-275246 – Crash after attempting to move item from off-hand in Creative inventory.
MC-275248 – Torches no longer have bottom faces.
MC-275249 – "FOV Effects" slider incorrectly modifying zoom values on the spyglass.
MC-275252 – Player head angle when crawling is now strange.
MC-275270 – Minecart not oriented correctly when placed on a sloped unpowered powered rail.
MC-275271 – Crash after attempting to move item to hotbar slot in Creative inventory.
MC-275273 – Baby mooshroom uses wrong scale.
MC-275276 – Minecarts can phase through blocks at the bottom of a slant.
MC-275277 – Trial chambers' encounter_4 trap often does not hit the player.
MC-275289 – There are empty chests in some chambers even after 24w33a.
MC-275293 – Internal exception when picking blocks not in hotbar but in inventory in Survival mode.
MC-275296 – Emissive textures are not emissive in the player's hand.
MC-275297 – Failing selectors and fake players in "score" selector result in an unexpected error.
MC-275307 – Hand doesn't show up when switching from Spectator mode.
MC-275310 – Cannot enchant armor in enchanting table.
MC-275319 – End crystals in 24w33a appear to be slightly smaller than in previous versions.
MC-275323 – Pressing F3 + A to reload chunks crashes the game.
MC-275328 – Enchantment glint is not visible on items in item frames.
MC-275329 – As of 24w33a zombie villagers no longer raise their arms to attack.
MC-275332 – The rotation of a wall/ceiling lever and buttons does not affect the update order of wire in Redstone Experiment.
MC-275343 – Projectiles stuck in the world border can float in the air if the border size is changed.
MC-275361 – Baby zombie variant arms disconnect from their body when attacking.
MC-275377 – Derailed minecarts snap onto nearby rails after falling down.
MC-275397 – Redstone dust doesn't update properly.
MC-275436 – Cannot enchant books in enchanting table.
MC-275467 – Minecarts can launch the player hundreds of thousands of blocks upwards if they derail inside cobwebs or powdered snow.
MC-275473 – Slim model's arms are now lower than the torso by 0.5 pixels.
MC-275479 – Dispensers cannot place minecarts onto rails if there is a minecart one block away.
MC-275482 – Minecarts do not pick up mobs like they used to.
MC-275486 – Enchantable data component doesn't work with items that only have enchantments through a data pack.
MC-275498 – Clocks, compasses and recovery compasses don't function in item frames.
MC-275553 – Minecarts which exit the End onto no rails are left permamentally tilted.
MC-275554 – Minecarts between two downward slopes will shake violently and never settle.
MC-275566 – Game crash when trying to open various GUIs with Fabulous graphics.
MC-275569 – Outer layer of the skin shows when disabled until going into third-person.
MC-275628 – Minecarts transitioning from even to downward rails, derail above a certain speed.
MC-275631 – You cannot stop a minecart by standing in the way if it's on an ascending track.
MC-275677 – Minecarts sometimes aren't affected by cobwebs when moving upwards.

Videos

Videos made by Slicedlime:

Trivia

The banner image for this snapshot is a reference to octree, a data structure in which each node has eight children. Octrees are used as a culling technique for performance optimization in this snapshot.

Notes

↑ The name for the "cooldown group" does not follow the usual snake_case format, and is different to what is written in the changelog. See MC-275837.
↑ Although claimed by minecraft.net that fishing bobbers bounce on the world border, they don't and instead behave the same way as they did before.

References

↑ "Minecraft Snapshot 24w34a" – Minecraft.net, August 21, 2024.

Navigation

[2] The name for the "cooldown group" does not follow the usual snake_case format, and is different to what is written in the changelog. See MC-275837.

[3] Although claimed by minecraft.net that fishing bobbers bounce on the world border, they don't and instead behave the same way as they did before.

[1] "Minecraft Snapshot 24w34a" – Minecraft.net, August 21, 2024.

[1]

[note 1]

[note 2]