Java Edition 24w34a

{
 "title": "Minecraft 24w34a",
 "images": [
 "24w34a.jpg",
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 "field": "''(link to Java Edition article, displayed as Java Edition)''",
 "label": "(link to Edition article, displayed as Edition)"
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 {
 "field": "August 21, 2024",
 "label": "Release date"
 },
 {
 "field": "(link to Snapshot article, displayed as Snapshot)",
 "label": "(link to Version types article, displayed as Type)"
 },
 {
 "field": "(link to Java Edition 1.21.2 article, displayed as 1.21.2)",
 "label": "Snapshot for"
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 "field": "[https://piston-data.mojang.com/v1/objects/f252db3368f588fa8c946dcbeed712bfe109e816/client.jar Client] ([https://piston-meta.mojang.com/v1/packages/17e3b903641353554e4b1728df2b62b97562d0ab/24w34a.json .json])<br />[https://piston-data.mojang.com/v1/objects/ff16e26392a5ced7cfe52ffdc5461cd646b9b65d/server.jar Server]",
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 "label": "(link to Obfuscation map article, displayed as Obfuscation maps)"
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 {
 "field": " <span style=\"font-size:smaller\"><abbr title=\"decimal\">dec</abbr>: </span>1073742030<br /> <span style=\"font-size:smaller\"><abbr title=\"hexadecimal\">hex</abbr>: </span>400000CE",
 "label": "(link to Protocol version article, displayed as Protocol version)"
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 {
 "field": "4060",
 "label": "(link to Data version article, displayed as Data version)"
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 {
 "field": "36",
 "label": "<span style=\"white-space: normal;\">(link to Pack format#List of pack formats article, displayed as Resource pack format)</span>"
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 "field": "50",
 "label": "<span style=\"white-space: normal;\">(link to Pack format#List of pack formats article, displayed as Data pack format)</span>"
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 "field": "<span class=\"plainlinks\">[https://en.wikipedia.org/wiki/Java_version_history#Java_SE_21_.28LTS.29 Java SE 21]</span>",
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 "invimages": [],
 "footer": "<table style=\"margin: auto; word-break: break-word;\">\n<tr style=\"background: inherit;\">\n<td style=\"padding: 0.4em\" >[[Java Edition 1.21.1|<span style=\"margin-right:-0.35em\">◄</span>◄  1.21.1]]</td>\n<td style=\"padding: 0.4em\">'''[[Java Edition 1.21.2|1.21.2]]'''</td>\n<td style=\"padding: 0.4em\" >[[Java Edition 1.21.3| 1.21.3 <span style=\"margin-right:-0.35em\">►</span>►]]</td>\n</tr>\n<tr style=\"background: inherit;\">\n<td style=\"padding: 0.4em\">\n[[Java Edition 24w33a|◄  24w33a]]\n</td>\n<td style=\"padding: 0.4em\">''' 24w34a'''</td>\n<td style=\"padding: 0.4em\">\n[[Java Edition 24w35a| 24w35a ►]]\n</td>\n</tr>\n</table>"
}

24w34a is the second snapshot for Java Edition 1.21.2, released on August 21, 2024.^[2] It contains some tweaks to experimental features, as well as some technical changes and optimizations.

Data component format

• Added minecraft:consumable item stack component.

• 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.

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

• Added minecraft:use_remainder item stack component.

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

General

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

Blaze

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

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.

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.

Recipe book

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

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)

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.

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  +  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.

• 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.