Minecraft Wiki

The Minecraft Wiki is no longer considered as official by Microsoft and therefore several changes are required to be made, including to the wiki's logo. Please read this announcement for more information.

READ MORE

Minecraft Wiki
Advertisement
Minecraft 21w43a
21w43a.jpg
Java Edition 21w43a.png
Edition

Java Edition

Type

Snapshot

Release date

October 27, 2021

Snapshot for

1.18

Downloads

Client (.json)
Server

Obfuscation maps

Client
Server

Protocol version

 dec: 1073741871
 hex: 4000002F

Data version

2844

21w43a is the seventh snapshot for Java Edition 1.18, released on October 27, 2021,[1] which adds the old world upgrading and fixes bugs.

Additions[]

World generation[]

Upgrading of old worlds
  • Terrain from new chunks will now blend with existing terrain from old chunks, preventing glitched borders from occurring.
  • The old bedrock layer between Y=0 and Y=4 in old chunks gets replaced with deepslate.
  • If there is bedrock at Y=0, lower places in old chunks will be filled with deepslate.
    • Caves do not generate below Y=0 in old chunks but lava lakes and geodes may generate.
  • A new bedrock layer is placed at Y=-64.
  • Worlds upgraded in this snapshot have these changes permanently applied.

General[]

Tags

Changes[]

Blocks[]

Big Dripleaf

World generation[]

Aquifers
  • Water levels change less often (slightly fewer underground waterfalls).
  • Lava aquifers are slightly less common.
Caves
  • Reduced the amount of flooded caves near river and ocean coastlines.
Ocean
Seeds
  • Have been reshuffled again. Worlds will not look like as they did in previous snapshots.[2]

General[]

Chunk format
  • Removed chunk’s Level and moved everything it contained up.
    • Level.Entities has moved to entities.
    • Level.TileEntities has moved to block_entities.
    • Level.TileTicks and Level.ToBeTicked have moved to block_ticks.
    • Level.LiquidTicks and Level.LiquidsToBeTicked have moved to fluid_ticks.
    • Level.Sections has moved to sections.
    • Level.Structures has moved to structures.
    • Level.Structures.Starts has moved to structures.starts.
    • Level.Sections[].block_states has moved to sections[].block_states.
    • Level.Sections[].biomes has moved to sections[].biomes.
  • Added yPos the minimum section y position in the chunk.
  • Added below_zero_retrogen containing data to support below zero generation.
  • Added blending_data containing data to support blending new world generation with existing chunks.
Options
  • The Priority Updates video setting has been renamed to Chunk Builder, added tooltips to its three options, and renamed them:
    • "nearby" renamed to "Fully Blocking".
    • "by player" renamed to "Semi Blocking".
    • "none" renamed to "Threaded".
Tick
  • Changed some internal details of block and fluid ticking to improve save times.

Fixes[]

11 issues fixed
From released versions before 1.18
  • MC-49010 – Cloning pressure plates or buttons whilst they're activated keeps them pressed forever.
  • MC-131930 – Deep warm ocean generates without coral and sea pickles.
  • MC-156616 – Badlands layers not generating properly.
  • MC-217379 – Pufferfish don't spawn in deep warm ocean.
  • MC-224205 – Cloned big dripleaves remain tilted forever when their tilt value is not equal to "none".
  • MC-228745 – Big dripleafs can't be supported by farmland.
  • MC-238073 – Decorators are independent of world seed.
From the 1.18 development versions
  • MC-236615 – Priority updates setting has improper capitalization.
  • MC-236624 – Deep warm oceans don't count towards the "Adventuring Time" advancement.
  • MC-236970 – Badlands strata is covered by orange terracotta at Y=160 and above.
  • MC-238939 – Stone can generate in the Nether.

Video[]

Video made by slicedlime:

References[]

Advertisement