Java Edition 1.21.2 Pre-Release 1

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1.21.2 Pre-Release 1 (known as 1.21.2-pre1 in the launcher) is the first pre-release for Java Edition 1.21.2, released on October 8, 2024,^[1] which fixes bugs.

Game rule

• Added the disablePlayerMovementCheck game rule.
  • Controls the player movement speed restriction.
  • This behaves the same as the disableElytraMovementCheck rule, but applies irrespective of flying with elytra.
  • Default to false.

Oxygen bar

• Added an empty state for air bubbles (👁 Image
  ) along with a wobble when the player is drowning.
• Added a popping sound for when bubbles pop on the oxygen bar, increasing in pitch depending on the oxygen left.

Data pack

• The pack format version is now 57.

Item components

• minecraft:equippable
  • Added field camera_overlay (optional): namespaced ID of the overlay texture to use when equipped.
    • If not specified, no overlay is used.
    • The ID addresses a texture under the textures/ folder and automatically assumed to be .png.
      • For instance, misc/pumpkinblur addresses textures/misc/pumpkinblur.png.

Resource pack

• The pack format version is now 41.
• Added texture and sound for tweaked air bubble UI.
  • New texture added for empty air bubble.
  • Sound added for when air bubble pops.

Particles

• The format of color fields in particle options is now more standardized:
  • RGB fields can always be encoded either as a vector of floats (order: [R,G,B]) or as a single packed integer (order: RGB).
  • ARGB fields can always be encoded either as a vector of floats (order: [R,G,B,A] or as a single packed integer (order: ARGB).
  • Changed fields:
    • minecraft:trail.color (previously accepted only integer).
    • minecraft:dust.color (previously accepted only vector of floats).
    • minecraft:dust_color_transition.from_color (previously accepted only vector of floats).
    • minecraft:dust_color_transition.to_color (previously accepted only vector of floats).

Enchanting

• Carpets and wolf armor now show the enchantment glint on llamas and wolves.

The listed changes are only present when the "Winter Drop" experimental data pack is enabled.

Creaking heart

• A comparator that is attached to the creaking heart block outputs a signal strength dependent on the distance to the connected creaking.

Creaking

• Doesn't activate or freeze around players in Creative mode.
• Cannot be named with a name tag if summoned via a creaking heart.

Tags

• Added pale_garden to the #is_overworld biome tag.

29 issues fixed

From released versions before 1.21

• MC-271961 – Parity Issue: No empty bubbles on the oxygen bar and popping sound.

From the 1.21.2 development versions

• MC-276360 – Repeating command block data is often lost when moving it around in inventory.
• MC-276604 – Horse Armor no longer has enchantment glint.
• MC-276815 – Dyed bundles are missing the "filled" predicate.
• MC-276965 – Post shader ColorModulate uniform not reset properly after spectating spiders.
• MC-276979 – Lock field on containers and minecraft:lock data component do not get datafixed correctly when a \ is present.
• MC-277017 – Flaming arrows no longer extinguish when water or powder snow is placed in its location.
• MC-277019 – Execute command teleporting across dimensions does not use correct relative coordinates.
• MC-277027 – Shapeless recipes accept anything if one of their ingredients is an empty tag.
• MC-277028 – Bundles do not empty smoothly.

From the previous development version

• MC-277067 – The high contrast and programmer art resource packs are displayed as being incompatible.
• MC-277075 – Pale hanging moss is all destroyed at the same time when its supporting block is removed.
• MC-277078 – Trim advancements use recipe registry key.
• MC-277108 – The "below_name" scoreboard display mode renders with dark parts when custom colors are set.
• MC-277111 – Wandering traders can sell pale oak saplings even when they're disabled.
• MC-277118 – Creakings can spawn with doMobSpawning set to false.
• MC-277131 – Pale garden missing from #minecraft:is_overworld biome tag.
• MC-277141 – /rotate command is not restricted to permission level 2.
• MC-277143 – Horse armor has damage-related components.
• MC-277144 – Furnaces, blast furnaces, and smokers delete all of their contents inside them once reloaded after smelting items.
• MC-277148 – Pack filters removing recipes that the player has unlocked causes data pack loading to fail.
• MC-277160 – Pale hanging moss is often immediately destroyed when placed using the /fill command.
• MC-277163 – Map color for pale oak saplings is incorrect.
• MC-277176 – Team affixes have dark lines between them and the username in player name tags.
• MC-277215 – The game crashes when attempting to accept or reject already accepted or rejected realm invitations.
• MC-277301 – The enchantment glint isn't visible on thrown tridents that are enchanted or held in the hand in third person when using Fabulous graphics.
• MC-277302 – The enchantment glint isn't visible on shields that are enchanted in third person when using Fabulous graphics.
• MC-277335 – Pale moss carpet can be swapped without destroying the upper vine.
• MC-277371 – Pale moss carpet is often immediately destroyed when placed using the /fill command.