Minecraft:Java Edition 1.21 Pre-Release 1

1.21 Pre-Release 1 (known as 1.21-pre1 in the Minecraft:launcher) is the first pre-release for Minecraft:Java Edition 1.21, released on May 29, 2024,<ref name="mcnet">Template:Cite</ref> which fixes bugs and makes changes to portals.

Additions

General

Minecraft:Enchantments

• lookup
  • A "Level-Based Value" type that maps a list of values to specific levels, and applies a fallback if the level is greater than the number of values supplied.
  • Fields:
    • values: A list of values indexed by level - 1 to apply, if present.
    • fallback: A fallback level-based value to apply if the level is greater than the size of values.

Changes

Blocks

Minecraft:Ominous trial spawner

• Mobs removed by a trial spawner converting to ominous state now drop any items they previously picked up from the ground.

Items

Minecraft:Mace

• Attack speed has been changed to 0.6.

Non-mob entities

Minecraft:Boats

• Are now Minecraft:leashable.

World generation

File:Obsidian portal blocks broken item forms.png

Blocks are now broken as if mined by the player when the obsidian platform is regenerated.

Minecraft:Obsidian platform

• When re-generated when a new player enters the Minecraft:End portal, instead of breaking all blocks 3 blocks above it the blocks are instead broken as if mined by a player, dropping the item and (if a container) all its contents.

Minecraft:Enchantments

Minecraft:Wind Burst

• Now bounces the player a further 7 blocks up per enchantment level, for 21 blocks at level 3.<ref>Template:Mcnet "Following changes were introduced in Pre-Release 1; The Wind Burst enchantment now bounces the player 7 blocks up per enchantment level"</ref>

General

Minecraft:Data pack

• The Minecraft:pack format version is now 46
• Added new configurable fields to jigsaw structures and single_pool_element types.

Minecraft:Debug

• The game now stores reports from failed chunks' loads and saves in the debug directory.

Effect conditions

• Unlike with loot tables, all effect conditions now need to be inline objects and cannot be references.

Minecraft:Loot tables

• random_chance_with_enchanted_bonus
  • chance field has been removed.
  • unenchanted_chance: a new field for the chance for an unenchanted item.
  • enchanted_chance: a new field for the chance for an enchanted item; a level-based value.

Minecraft:Portals

• Minecraft:Ender pearls that are thrown through portals can now teleport players to a different dimension than the one they are currently in.
• It is now possible to travel with rideable entities through portals.
  • When riding entities through portals, the delay before teleporting is not applied.

Reporting

• Report data generator now includes information about network packets.

Server links

• There are some generic-use link names, like "Support" or "Website", without any special functionality.Template:Info needed

Structures

• Added liquid_settings field to structures of type minecraft:jigsaw.
• Possible values:
  • apply_waterlogging: If any waterloggable block overlaps with existing water, it will become waterlogged.
  • ignore_waterlogging: Will not waterlog any waterloggable blocks that overlap existing water.
    • Default value is apply_waterlogging.
• Added optional field override_liquid_settings to single_pool_element element type.
  • Same possible values as the liquid_settings in jigsaw structures.
  • Overrides the inherited liquid settings from the parent jigsaw structure while generating this pool element.

Minecraft:Tags

• The fire_aspect_lightable block tag was removed.

Removals

General

Minecraft:Enchantments

• Removed the functionality of Minecraft:Fire Aspect being able to light blocks on fire.
  • Mojang has stated that this feature has been temporarily removed for refinement, and will be reintroduced in a later release.<ref name="mcnet"/>

Minecraft:Gamerules

• Removed the entitiesWithPassengersCanUsePortals Minecraft:gamerule that was introduced in Minecraft:24w21a.
  • Entities with passengers being able to use portals is now the default behavior.

Minecraft:Tags

• The fire_aspect_lightable block tag was removed.