Java Edition 25w10a

25w10a is the tenth and final snapshot for Java Edition 1.21.5, released on March 5, 2025.^[1]

Game rule

• Added the tntExplodes game rule. Previously, that was only avaliable on Legacy Console Edition and Bedrock Edition.
  • When false, TNT will not explode and cannot be primed by any means.
    • Trying to do so directly, like with a flint and steel, will show a message on the action bar.
    • Powering a TNT block with redstone makes it simply vanish, as does blowing it up with a creeper.
    • A TNT block on fire can burn up as if it was a plank.
  • Default value: true

Tag

• Added #flowers item tag.
  • Corresponds to the #flowers block tag.

Cactus flower

• Can now be placed on farmland.
• Can now be picked up and carried by endermen.

Test block and test instance block

• Their textures have been updated.

Cow

• The new models have been tweaked so the horn placement and leg positioning now match the model on Bedrock Edition.
• The textures of temperate cow legs no longer have harsh borders due to a mirroring issue.
• The heads of baby cows are now positioned correctly.

Sheep

• Its wool texture has been tweaked to remove the stark line at the back.

Data pack

• The pack format version is now 70.

Entity data

• Custom data (previously present only on markers) is now available on all entities.
  • It is exposed as a minecraft:custom_data component, so it can be set by spawning items and matched by predicates.
  • The component is currently stored in a field called data.
  • It is stored only if it's non-empty.

Predicates

• Block predicates
  • New optional fields have been added to block predicates: components and predicates.
  • Their functionality and format are identical to the fields components and predicates on item predicates, but they operate on block entity components (when present).
    • When present, components will match exact contents of block entity components.
    • When present, predicates will match partial contents of block entity components.

• Entity predicates
  • A new optional field has been added to entity predicates: predicates.
    • Its functionality and format is identical to the field predicates on item predicates, but they operate on entity components.
      • When present, predicates will match partial contents of entity components.

Resource pack

• The version is now 54.
• "Global" uniforms may now be defined in any shader, and the game will attempt to fill it.
  • Currently, these are: ModelViewMat, ProjMat, TextureMat, ScreenSize, ColorModulator, Light0_Direction, Light1_Direction, GlintAlpha, FogStart, FogEnd, FogColor, FogShape, LineWidth, GameTime, ModelOffset.
  • The type of the uniform must match what it would normally be, or it'll be undefined behavior.

SNBT format

• SNBT now also supports following operations:
  • bool(arg) - converts argument to boolean.
    • If argument is a boolean value, returns value directly.
    • If argument is a number value, returns true if it is non-zero.
  • uuid(str) - converts string representation of UUID to integer array.
• Implicit infinite float values (like 1e1000) are now rejected.

Sounds

• Blocks that are broken by a piston now play their breaking sound.

Tag

• Added cactus_flower to #enderman_holdable block tag.
• Removed blocks that mine instantly without a tool from the #mineable/axe, and #sword_efficient block tags.

Title screen

• The panorama was changed to showcase the Spring to Life.

26 issues fixed

From released versions before 1.21

• MC-203550 – Blocks broken by pistons do not play breaking sounds.
• MC-269386 – Flow Pottery Sherd is not in the correct spot in the creative inventory.
• MC-270043 – Reduced armor glint applies to tridents.

From the 1.21.5 development versions

• MC-279414 – Flying far away in spectator mode and switching to creative softlocks the game for a while.
• MC-279920 – Beacons play the deactivation sound every game tick while on the death screen.
• MC-279967 – Temperate cows have strange mapping/harsh borders because of the leg texture becoming mirrored.
• MC-279993 – Baby cows' heads are incorrectly positioned.
• MC-280050 – The mule saddle texture is missing in the Programmer Art resource pack.
• MC-280061 – Test instance block has flipped lighting direction.
• MC-280063 – crafting_transmute recipes don't give an output if the output stack has the same count as the stack in the crafting grid.
• MC-280106 – Cactus flowers cannot be held by endermen.
• MC-280109 – Leash all frog variants advancement is not deterministic in data generation.
• MC-280113 – Shears no longer consume durability when used on insta-mined blocks.
• MC-280143 – Monster spawner and trial spawner tooltip no longer displays the "Interact with Spawn Egg" hint.
• MC-280159 – New cow model does not match Bedrock Edition.
• MC-280242 – Not all ambient sounds have been moved to the "Ambient/Environment" category.
• MC-280244 – Temperate cow model in Java does not have its new horn placement from Bedrock Edition.
• MC-280285 – Some game events can crash the game when attempting to create vibration resonance with an amethyst block.
• MC-280315 – Crash when listing suggestions with invalid Unicode escapes.

From the previous development version

• MC-280325 – The player hand flickers in first-person mode.
• MC-280337 – Slimes freeze the game.
• MC-280360 – The game stops updating frames while loading chunks.
• MC-280379 – Frozen screen when entering any UI or after a few minutes of playing.
• MC-280383 – Items in inventories sometimes do not render.
• MC-280423 – Block textures flicker randomly.
• MC-280439 – Values out of bounds for float and double parse successfully in SNBT resulting in storing the value Infinity.