Java Edition 1.21 Pre-Release 1

Minecraft 1.21 Pre-Release 1
Edition	Java Edition
Release date	May 29, 2024
Type	Pre-release
Pre-release for	1.21
Downloads	Client (.json); Server
Obfuscation maps	Client; Server
Protocol version	dec: 1073742023; hex: 400000C7
Data version	3948
Resource pack format	34
Data pack format	46
Minimum Java version	Java SE 21

1.21 Pre-Release 1 (known as 1.21-pre1 in the launcher) is the first pre-release for Java Edition 1.21, released on May 29, 2024,^[1] which fixes bugs and makes changes to portals.

Additions

General

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

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

Mace

Attack speed has been changed to 0.6.

Non-mob entities

Boats

Are now leashable.

World generation

Obsidian platform

When re-generated when a new player enters the 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.

Enchantments

Wind Burst

Now bounces the player a further 7 blocks up per enchantment level, for 21 blocks at level 3.^[2]

General

Data pack

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

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.

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.

Portals

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.^{[more information 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.

Tags

The fire_aspect_lightable block tag was removed.

Removals

General

Enchantments

Removed the functionality of 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.^[1]

Gamerules

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

Tags

The fire_aspect_lightable block tag was removed.

Fixes

79 issues fixed

From released versions before 1.21

MC-902 – The End obsidian platform resets every time entities go through the End portal, which can cause blocks to be deleted.
MC-8983 – Primed TNT cannot travel through nether portals.
MC-50612 – Command blocks do not update when you place them near any source of power.
MC-97087 – Attributes won't work in main hand if they were in offhand.
MC-114566 – Can't teleport back to the central island with End gateway portal on outer End islands.
MC-148741 – Selection boxes in some screens are misaligned in comparison with their text.
MC-160140 – Shulker boxes on the obsidian platform are destroyed and do not drop when a player enters the End.
MC-169698 – Blocks within igloo basements can generate waterlogged when generating in close proximity to water.
MC-170907 – Network position deltas are processed relative to a wrong point.
MC-172031 – Throwing an ender pearl into a nether or End portal often has no effect.
MC-191591 – Saddles lose their NBT data when equipped on horses, zombie horses, skeleton horses, mules or donkeys via right-clicking.
MC-225870 – Breeding an axolotl in Creative replaces the bucket of tropical fish.
MC-265583 – Incorrect pluralization for skin customization strings for pants.
MC-265818 – The "gamerule.doVinesSpread.description" string consists of grammatically incorrect word usage.
MC-266140 – The "Open link" button within the Realms menu is improperly capitalized.
MC-266471 – Trial chambers can intersect aquifers, causing some blocks inside the structure to be waterlogged.
MC-267050 – Chat disabled strings are missing verbs.
MC-267071 – The word "packs" within the "download.pack.failed" string is always pluralized.
MC-267474 – Strings referencing the player's off hand are inconsistently spelled.
MC-267954 – World upgrade and downgrade Realms strings are improperly capitalized.
MC-268023 – The "selectWorld.experimental.details.title" string displayed within the experimental features details menu is improperly capitalized.
MC-268185 – Copper grates in trial chambers are waterlogged.
MC-269439 – Some diacritics intersect the language box in the languages menu.
MC-269617 – When ender pearls teleport non-player entities, no teleportation sound is played upon impact.
MC-269921 – Wind charges can be thrown though corners.
MC-270181 – Wind charges go through an entity if it is close to a player.
MC-270572 – Programmer Art resource pack duplicates some GUI texture files.
MC-270649 – The width of challenge advancements header is calculated in relation to the slash formatting of progress counter, causing overlap in some languages.
MC-270795 – Mobs despawned by ominous trial spawners can delete picked up items.
MC-270821 – Regular trial spawners spawn the first mob with ominous trial equipment if they were last active as ominous.
MC-270981 – View Bobbing toggle is not available in Accessibility Settings.
MC-271293 – Wind charge, fireball and shulker bullet makes a "Burning" sound as it passes through the lava.
MC-271446 – Mace attack speed was lowered to a point where all Wind Burst smash attacks are performed on uncharged attacks.
MC-271897 – End portal makes items disappear.
MC-272014 – Ender Dragon death animation is broken since 20w22a (and broken again in 20w45a).
MC-272073 – Item displays with billboard and rotation values create major visual bug.
MC-272079 – Medium/small slimes and magma cube's attack reach is too short.
MC-272198 – Shulkers' models sometimes appear offset upon End city generation.
MC-272253 – The strength of the Riptide enchantment is increased when holding tridents enchanted with Riptide in both hands.
MC-272267 – "Changes the blurriness of menu background" lacks punctuation.
MC-272279 – Resource packs containing TrueType fonts fail to load on x64 macOS systems.
MC-272308 – Axolots can be attached to new leads when being already leashed.
MC-272445 – Command blocks made from Ctrl + Pick Block do not activate on first try.
MC-272469 – When the wind charge, fireball or shulker bullet is in the lava, it will continue to make a high-loudness noise.
MC-272515 – Component-modified saddles get their components wiped when dispensed onto a horse, mule, or camel.

From the 1.21 development versions

MC-271870 – random_chance_with_looting function base value is for enchantment level 1.
MC-271929 – Applying multiple layers of "using_converts_to" will produce ghost items.
MC-272038 – The error "Can't access registry ResourceKey[minecraft:root / minecraft:game_event]" is sometimes in the log file.
MC-272053 – The "armor_effectiveness" effect does not work with projectiles or indirect damage.
MC-272258 – block.portal.travel sound now plays when teleporting to a different dimension using commands.
MC-272264 – Narrator button in Accessibility Settings doesn't update upon pressing Ctrl + B.
MC-272311 – The enchantment glint sometimes doesn't render in interfaces and first person.
MC-272313 – The game crashes when attempting to open the Realms menu.
MC-272315 – Serial comma is missing from the entitiesWithPassengersCanUsePortals game rule description.
MC-272322 – When the player is riding an entity through portals, the player and the entity may teleport to the wrong place.
MC-272328 – entitiesWithPassengersCanUsePortals game rule description is missing the proper term capitalization.
MC-272329 – Riding an entity into portals may cause the game to softlock.
MC-272355 – Ellipsis text is stringified within NBT text formatter list truncation.
MC-272424 – Chunks occasionally have large dark areas in the sky.
MC-272430 – Breaking a carrot/warped fungus on a stick gives a damaged fishing rod.

From the previous development version

MC-272339 – Holding crossbows in both hands stacks Quick Charge.
MC-272342 – Typo in mining fatigue attribute ID "minecraft:effect.minining_fatigue".
MC-272343 – Ender pearls don't work when riding an entity.
MC-272344 – When teleported by an ender pearl, the "portal noise fades" sound is played.
MC-272347 – Upgrading from before 24w21a doesn't update structures saved by structure blocks.
MC-272361 – Minecarts and passengers offset from block when riding through portals.
MC-272364 – Players spawn one block above the obsidian platform when entering an End portal.
MC-272365 – Inventory images of all banners are completely white.
MC-272369 – The player can respawn in a solid block with default spawnpoint.
MC-272374 – 24w21b will not upgrade attribute_modifiers from previous versions.
MC-272399 – Primed TNT entities can't go through an End portal anymore.
MC-272400 – Shield in inventory with banner shows as white.
MC-272403 – Portal linking chunk loading changes.
MC-272406 – Crash when zombie tries to spawn second reinforcement.
MC-272408 – set_attributes item modifier can add the same attribute modifier twice.
MC-272427 – Flame, Power, Punch, and Piercing enchantments no longer work on the last use of the item.
MC-272438 – End crystal entities can't go through an End portal anymore.
MC-272442 – Comparator output of jukebox no longer persists on music disc finish.
MC-272490 – @n can select dying entities, unlike @e.

Videos

Videos made by Slicedlime:

References

↑ ^a ^b "Minecraft 1.21 Pre-Release 1" – Minecraft.net, May 29, 2024.
↑ "Minecraft 1.21 Pre-Release 3" – Minecraft.net, June 5, 2024. "Following changes were introduced in Pre-Release 1; The Wind Burst enchantment now bounces the player 7 blocks up per enchantment level"

Navigation

[mcnet-1] "Minecraft 1.21 Pre-Release 1" – Minecraft.net, May 29, 2024.

[2] "Minecraft 1.21 Pre-Release 3" – Minecraft.net, June 5, 2024. "Following changes were introduced in Pre-Release 1; The Wind Burst enchantment now bounces the player 7 blocks up per enchantment level"

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