Java Edition 24w36a

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 "label": "Release date"
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 "field": " <span style=\"font-size:smaller\"><abbr title=\"decimal\">dec</abbr>: </span>1073742032<br /> <span style=\"font-size:smaller\"><abbr title=\"hexadecimal\">hex</abbr>: </span>400000D0",
 "label": "(link to Protocol version article, displayed as Protocol version)"
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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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 "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 24w35a|◄  24w35a]]\n</td>\n<td style=\"padding: 0.4em\">''' 24w36a'''</td>\n<td style=\"padding: 0.4em\">\n[[Java Edition 24w37a| 24w37a ►]]\n</td>\n</tr>\n</table>"
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24w36a is the fourth snapshot for Java Edition 1.21.2, released on September 4, 2024.^[1]

Data component format

• Added minecraft:item_model item stack component.

• e.g. item_model="minecraft:diamond_sword"

• Added minecraft:equippable item stack component.

• e.g. equippable={slot:'chest',equip_sound:'item.armor.equip_chain'}.

• Added minecraft:glider item stack component.

• e.g. glider={}.

• Added minecraft:tooltip_style item stack component.

• e.g. tooltip_style='minecraft:special_sword'.

Predicates

• Added a new field in the player sub-predicate, input, that can be used to detect which movement keys the player is pressing.
  • If specified the predicate matches with the corresponding keybind that the player is pressing; it supports detecting the following input:
    • forward: boolean (optional).
    • backward: boolean (optional).
    • left: boolean (optional).
    • right: boolean (optional).
    • jump: boolean (optional).
    • sneak: boolean (optional).
    • sprint: boolean (optional).

Tags

• Added the bats_spawnable_on block tag.
  • Controls the blocks that bats can spawn on.
• Added the following item tags:
  • repairs_leather_armor
  • repairs_iron_armor
  • repairs_chain_armor
  • repairs_gold_armor
  • repairs_diamond_armor
  • repairs_netherite_armor
  • repairs_turtle_helmet
  • repairs_wolf_armor
  • Control which items can be used to repair various armor sets.
• Added the piglin_safe_armor item tag.
  • Controls what items, when worn by a player, prevents piglins from getting angry.

Dolphin

• Baby dolphin now spawns naturally at 5% chance.

Squid

• Squid spawn eggs now only spawn adult squid.
  • There is a 5% chance of squid spawned in groups in the wild to be a baby.

General

• When a mob converts from one type to another (e.g. piglin to zombified piglin), the health of the converted mob is set to the same percentage of max health as the original mob had before conversion.
• The calculation for the duration of the effect from splash potions has been changed. Splash potions thrown at the player's feet now apply the effect for almost the same duration as when thrown at the head.^[2]

Data component format

• minecraft:item_name
  • This component is now always present on every item.

Data pack

• The pack format version is now 52.

Models

• All item models can now use the broken property in model overrides that was previously limited to just the elytra.
  • This has a value of 1 if the item has 1 durability left, or 0 otherwise.
• The appearance of equipment when equipped by players or certain mobs can now be customized by defining 'equipment models' in the resource pack.
  • Equipment model definitions are loaded from assets/<namespace>/models/equipment/<path>.json.
    • These can then be referenced by the equippable component with a model id of namespace:path.
  • The model definition is an object with fields: wolf_body, horse_body, llama_body, humanoid, humanoid_leggings, wings
    • All fields are optional, and can be used to specify a list of layers for the given model layer type.
    • Each field contains list of layer objects:
      • texture: namespaced texture location for this layer.
        • namespace:path resolves to assets/<namespace>/textures/entity/equipment/<layer_type>/<path>.png
      • dyeable: object with fields (optional), specifying how this layer behaves when dyed (in the dyeable item tag, and has dyed_color component)
        • color_when_undyed: RGB color int (optional)
        • If specified, this layer is tinted by the color contained in the dyed_color component.
          • If the item is not dyeable or not dyed, it is tinted based on the color specified by color_when_undyed.
          • If color_when_undyed is not specified and the item is not dyed, the layer is hidden.
      • use_player_texture: boolean (default: false), true if this layer texture should be overridden by a texture given by the player.
        • Only used for wings layers, which overrides with the player's custom elytra texture.

Resource pack

• The pack format version is now 37.
• The tooltip background and frame may now be customized by replacing sprites:
  • tooltip/background: The background of the tooltip.
  • tooltip/frame: The frame appearing around the tooltip.
  • Items with a custom tooltip_style component uses sprites with IDs:
    • <namespace>:tooltip/<path>_background and <namespace>:tooltip/<path>_frame
• The nine_slice GUI sprite scaling mode has a new optional boolean (true or false, yes or no) property: stretch_inner.
  • If true, the inner parts of the texture (i.e. not the corners) are stretched instead of tiled.
  • If not specified, defaults to false as before.

Textures

• All equipment-related textures were moved to subfolders of the textures/entity/equipment directory.
  • Player armor textures were moved to textures/entity/equipment/humanoid and textures/entity/equipment/humanoid_leggings
    • <material>_layer_1 textures were renamed to <material>, and moved into the humanoid subdirectory.
    • <material>_layer_2 textures were renamed to <material>, and moved into the humanoid_leggings subdirectory.
    • leather_layer_1_overlay and leather_layer_2_overlay textures were renamed to leather_overlay in their respective subdirectories.
  • wolf_armor and wolf_armor_overlay textures have moved to textures/entity/equipment/wolf_body/ and were renamed to armadillo_scute and armadillo_scute_overlay respectively.
  • turtle_layer_1 has been renamed to turtle_scute.
  • Llama decor textures were moved to textures/entity/equipment/llama_body
  • Horse armor textures were moved to textures/entity/equipment/horse_body
  • The elytra texture has been moved to textures/entity/equipment/wings/elytra
• Armor trim textures have also been moved to match the folder structure of the regular equipment textures.
  • Textures in textures/trims/models/armor were divided between textures/trims/entity/humanoid and textures/trims/entity/humanoid_leggings
  • For leggings textures, the _leggings suffix is dropped.

Trims

• All equippable items with an equipment model defined support rendering trims, based on the trim component.
• Trim textures are loaded from the appropriate folder in the textures/trims/entity directory.
  • For example, armor with wolf_body layers fetch trims from textures/trims/entity/wolf_body

Bundles

• When a bundle is used in the hotbar, one group of items is emptied at a time instead of everything being emptied at once.

52 issues fixed

From released versions before 1.21

• MC-16829 – The horse armor model does not show the enchantment glint effect.
• MC-38022 – Order of rendering translucent block faces fails to update with camera position.
• MC-88967 – Most NBT tags are not kept when a mob converts to another mob.
• MC-92875 – Collisionless blocks ignore entities with high velocity.
• MC-135898 – Teams are not retained when a mob converts to another mob.
• MC-154053 – Trader llama spitting far distance when attacked.
• MC-167242 – Bed stays occupied after a lightning turns the villager sleeping in it into a witch.
• MC-186362 – Casting issue: Translucent block rendering breaks down at high distances.
• MC-196556 – When projectiles (such as arrows and tridents) move too fast, they can't be teleported by portals and end gateways.
• MC-196736 – Hoglins break their leash when zombifying, despite zoglins being leashable.
• MC-196964 – Fall damage is reset when an entity converts to another entity.
• MC-207101 – When a lingering potion lands on top of a player/mob, the area effect cloud spawns above the player/mob instead of inside it, rendering the lingering potion useless.
• MC-230317 – Lead disappears when mooshroom cow is sheared.
• MC-250924 – Goat horns are missing sounds.
• MC-259376 – ServerboundMovePlayerPacket's xRot can have invalid value.
• MC-259936 – Equipping armor in hand via right-click equips entire stack.
• MC-261666 – Armor given to villagers is lost when they convert to zombie villagers.
• MC-262598 – Tripwire textures in the tripwire hook "attached: true" state have a wrong black rendering when the tripwire hook is attached to a non-transparent block.
• MC-269447 – Hover text background box cannot be retextured.
• MC-270183 – Lingering potions do not give effects when hit on the target's head.
• MC-271826 – Armor default attribute modifier component can't be removed.

From 1.21

• MC-273300 – Horse armor and wolf armor swap from off-hand to main hand upon pressing the Use Item/Place Block key.

From 1.21.1

• MC-275919 – issues with hit detection/registration in PvP since server switch to 1.21.

From the 1.21.2 development versions

• MC-275228 – The player can duplicate items in the Creative hotbar.
• MC-275239 – Item duplication while a screen is opened (Creative mode).
• MC-275298 – Blocks with special collision behavior have a larger detection range than previously.
• MC-275299 – Crafting using + Drop key crafts the incorrect amount of items.
• MC-275344 – Sweet berry bushes deal damage inconsistently.
• MC-275345 – Inventory bug that causes items to be constantly shuffled.
• MC-275418 – Feeding baby dolphins won't speed up their growth.
• MC-275437 – Fast moving entities freeze the server which causes watchdog crash.
• MC-275445 – Specifying the size of a target in post effect shaders fails.
• MC-275450 – Player motion data no longer updates while riding another entity.
• MC-275455 – Player motion is no longer retained on relative teleportation.
• MC-275462 – Bats can spawn in unusual places, such as in woodland mansions and beneath trees.
• MC-275497 – The repairable data component does not exist in armor items by default.
• MC-275537 – Sliding down honey blocks is slower than in previous versions.
• MC-275622 – Minecarts with TNT are more volatile than in previous releases.
• MC-275624 – Redstone wire with custom model unexpectedly appears green.
• MC-275638 – It is still possible to go through portals without being teleported when going quickly enough by throwing Riptide tridents.
• MC-275642 – Baby dolphins do not spawn naturally.
• MC-275655 – Entity rotation does not visually update when using the /teleport command until the world is reloaded.
• MC-275745 – A scoreboard objective with display mode below_name renders right behind the player's name.
• MC-275767 – Camera is shaky when riding an entity that is being constantly teleported.
• MC-275770 – Guardian beam attacks stay yellow and do not shift colors anymore.
• MC-276027 – Chestplates and boots on armor stands render the helmet overlay texture.
• MC-276030 – The blue highlighted text background for signs is gone.
• MC-276064 – Tall grass generated from bone mealing a grass block will delete the second block above it.

From the previous development version

• MC-276122 – Soul sand and magma block bubble columns don't move the player vertically in Creative mode when not flying.
• MC-276132 – Translucency sorting seems to be slightly broken.
• MC-276179 – Zombie villagers don't raise their arms to attack again.
• MC-276204 – Dolphins and axolotls keep trying to swim into the seabed.