Java Edition 25w36a

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

 

The game crashes when an ender chest, another player, or a spawner set to spawn mannequins is rendered in the world.

Minecraft 25w36a

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25w36a is the seventh snapshot for Java Edition 1.21.9, released on September 2, 2025.^[1] It improves several textures and visual features, adds the ability to set different world borders in different dimensions, and adds a new technical entity.

Mannequin

• Added a new type of technical entity called minecraft:mannequin which can only be spawned with summon commands.
  • A mannequin is a player avatar without a connected player.
  • Mannequins always show an "NPC" text where a Player's below_score score would show.
  • Mannequins function as living entities, like armor stands.
    • They can hold and wear equipment, have attributes & effects, take damage, etc.
  • Data Fields:
    • profile - Which profile to show on the entity. This is either a Player profile (same format as a minecraft:profile component) or a Mannequin profile with the following fields:
      • texture - Namespaced ID of the skin texture to use.
        • The skin is specified relative to the textures folder and with a .png suffix.
        • e.g. entity/player/wide/steve will use the default wide Steve skin.
      • cape - Optional namespaced ID of the cape texture to use.
        • When specified, uses the same format as the texture field.
        • Omitting this field means the mannequin has no cape.
      • elytra - Optional namespaced ID of the elytra texture to use.
        • When specified, uses the same format as the texture field.
        • Omitting this field means the mannequin uses the cape texture, or if that is also omitted, the default elytra texture when wearing elytra.
      • model - Optional model type, one of wide and slim.
        • If omitted, wide is used.
    • hidden_layers - List of outer skin layers to hide.
      • Valid entries: cape, jacket, left_sleeve, right_sleeve, left_pants_leg, right_pants_leg, hat.
    • main_hand - Which hand is the main hand of the mannequin.
      • One of left and right.
  • This entity highly resembles the Mob entity removed long ago in Beta 1.2, as it is has a player skin and has no movement AI.

Copper lantern and copper torch

• Adjusted the colors to make them more discernible to color blind players.

Shelf

• Powered shelves can now only connect to other powered shelves facing the exact same direction.

Data pack

• The pack format version is now 86.0.

End flash

• While the ender dragon fog effect is active, the flash source in the sky is not visible and the brightness of the light affecting the world is reduced.

Key binds

• Multiple key binds that have the same key assigned to them can now work together, while before only one would work.
  • For example, it's now possible to bind the d key to Jump and Strafe Left, to jump and strafe left at the same time.
  • The red warning for assigning the same key to multiple key binds is changed to yellow.
• Added a Spectator category in the key binds screen, alongside the pre-existing Highlight Players key bind.
• The spectator hotbar menu key can now be rebound.

Particles

• dragon_breath now optionally takes a power parameter (float, default 1.0), which is multiplied onto its initial velocity, after all randomness.
• instant_effect and effect now optionally take power (float, default 1.0) and color (rgb, default 0xFFFFFF) parameters.
• flash now requires a color parameter (argb).

Rendering

• Particles outside of players view are not rendered anymore, which provides a performance improvement in some cases.

Resource pack

• The version is now 68.0.

Server Code of Conduct

• Formatting codes are now stripped from code of conduct files.

Shaders

• The following unused shaders have been removed:
  • core/position_color_lightmap.vsh
  • core/position_color_lightmap.fsh
  • core/position_color_tex_lightmap.vsh
  • core/position_color_tex_lightmap.fsh
• Minor change to uv calculations in the minecraft_sample_lightmap function in the core/terrain.vsh program.

UI

• Double-clicking a word in edit box now selects it.

World border

• The world border is now dimension-specific.
  • This means that each dimension can have its own world border size, position, etc.

58 issues fixed

From released versions before 1.21

• MC-223142 – Player can move while spectating a marker.
• MC-225088 – Overworld surface is darker than before on low brightness.
• MC-234737 – Typo in exception message: "EmtyPoolElement".
• MC-236508 – The title within the "Add Server" menu is displayed as "Edit Server Info".
• MC-237590 – The word "chunks" is improperly capitalized within the render and simulation distance sliders.
• MC-238273 – "Locked by another running instance of Minecraft" lacks punctuation.
• MC-249205 – "minecraft.used:minecraft.potion" increases by a value of two when using water bottles to create mud in creative mode.
• MC-250062 – Several strings throughout the game contain comma splices.
• MC-250193 – Server log does not use the string representation of a player's GameProfile on a disconnect during encryption.
• MC-254668 – Pressing ⎋ Escape on the death screen's title screen warning respawns the player.
• MC-257792 – Output slot for trading menu is off-center.
• MC-258191 – Root system feature allows hanging root vertical span of 0, causing error.
• MC-259347 – Height limit warning message is shown when right-clicking the top of a block at the build height limit with a bucket.
• MC-262370 – Some multiplayer strings are untranslatable.
• MC-264962 – Strings that contain two inputs for a given action have inconsistent spacing and apostrophes.
• MC-265807 – Mobs don't drown if their Air NBT is less than -19.

From 1.21.3

• MC-278435 – Mushroom Fields biome doesn't generate pumpkin patches despite being specified in vanilla datapack.

From 1.21.4

• MC-277975 – The first line of the command execution warning in an item's tooltip is missing punctuation.
• MC-279123 – Some strings that reference Minecraft Realms use inconsistent or missing verb forms.
• MC-279153 – Some strings that mention the base values of attributes are missing articles.
• MC-279173 – The "chat.disabled.invalid_command_signature" string is missing an article before the word "Command".
• MC-279174 – The "gamerule.spawnChunkRadius.description" string is missing an article before the word "Amount".
• MC-279175 – Some multiplayer disconnection strings are missing articles and demonstratives.
• MC-279176 – The "gamerule.commandModificationBlockLimit.description" string is missing an article before the word "Number".
• MC-279212 – Some narration strings are missing articles and possessive determiners.

From 1.21.5

• MC-295829 – Test instance block GUI uses "Batch" instead of "Environment".

From 1.21.6

• MC-298605 – When creating a Water World superflat world, the player spawns at the bottom of the sea.
• MC-299105 – Tears and Lava Chicken music disc 'desc' translations are unused.

From 1.21.8

• MC-301619 – Game mode translation key is used in the console message sent when a player tries to switch their game mode without permission.

From the 1.21.9 development versions

• MC-300055 – You get the advancement Wax On for changing the pose of a Copper Golem Statue while holding Honeycomb.
• MC-300088 – Items placed by a copper golem in a double chest do not update redstone comparators reading the right side of the double chest.
• MC-300109 – Lightning bolt does not remove oxidation from the lightning rod.
• MC-300169 – The CustomName tag of a copper golem statue is not kept when mined.
• MC-300192 – No darker trim for copper.
• MC-300201 – Breaking a copper golem statue with a pose does not retain its pose.
• MC-300416 – Copper golems' pathfinding to chests is biased to northwest.
• MC-300558 – Copper golems can open locked chests without an appropriate key item.
• MC-300729 – Incorrect or unusually obvious pixels on the weathered and exposed copper bars.
• MC-300961 – The armor layer on husks no longer reflects their larger size compared to other humanoids.
• MC-301099 – Copper chests worn on copper golems' heads are not visible.
• MC-301250 – Upon exiting the gamemode switcher (F3 + F4) while viewing the credits, the player still does not resume viewing the credits and instead remains in the end in a phantom state until they relog.
• MC-301258 – Copper golem statues in the walking pose have a bit of their necks poking through their arms.
• MC-301259 – Shelf align_items_to_bottom in block entity data doesn't work.
• MC-301261 – The right arm of the copper golem statue isn't connected to its body.
• MC-301276 – The hand animation no longer plays when shearing copper golems.
• MC-301277 – Item frames with maps and paintings cannot share a corner anymore.
• MC-301278 – The code of conduct screen renders carriage return characters.
• MC-301283 – Sprint and sneak input can get 'stuck' if a screen is opened right as the input is pressed.
• MC-301310 – The “Transfer Now” button in the realms menu renders outside the selection box.
• MC-301312 – You cannot begin to use items while looking at copper golems.
• MC-301324 – Sitting copper golem statue nose is rotated incorrectly.
• MC-301330 – Malicious server can force client to remain stuck on code of conduct screen.
• MC-301374 – Evokers can now spawn in Peaceful difficulty.

From the previous development version

• MC-301519 – Trying to use a command block while the "enableCommandBlocks" gamerule is set to false says "Command blocks are not enabled on this server" even if you're not on a server.
• MC-301523 – Some gamerule description strings consist of inconsistent concluding punctuation, redundantly include “or not”, and are grammatically incorrect.
• MC-301524 – The block breaking animation on banners now amplifies with each pattern applied.
• MC-301546 – Bells do not display ringing animation when another bell is nearby.
• MC-301577 – Block light sources produce shadows around themselves under skylight.

• Although not listed in the changelog, the flight trail particle effect for spectral arrows was changed from standard critical particles to white effect particles.