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21w44a is the eighth and final snapshot for Java Edition 1.18, released on November 3, 2021,[1] which improved the upgrading of old worlds, introduced new options, made some tweaks, and fixed bugs. It is also the final snapshot of 2021.

Additions[]

World generation[]

Upgrading of old worlds
  • Caves are now inserted under existing chunks when upgrading a world to the new world height.
    • Deepslate and the bedrock layer currently don't generate due to a bug.[2]
  • Large biomes and amplified worlds now have an upgrade path, and retain more of their characteristics when upgraded to the new terrain system.

General[]

Options
  • Added Online Options as a separate screen:
    • The "Realms Notifications" option has been moved to this screen.
    • Contains the new "Allow Server Listings" option.
      • When deactivated, the player name will not show up in server online player listings.
    • Contains the new "Server Difficulty" option, to indicate the difficulty of the current server.
server.properties
  • Added hide-online-players, which when set to "True", will not send a player list on status requests.
Tags

Changes[]

Gameplay[]

Advancements
  • All 50 Overworld biomes are now required to be visited for the Adventuring Time advancement, including the following biomes which were previously not required:
Weather
  • Sleeping now only resets the weather cycle if the weather is rain or a thunderstorm.

World generation[]

Deepslate
  • Now the gradual transition from stone starts at height between Y=0 to Y=8, rather than Y=-8 to Y=0 previously.

General[]

JFR profiling
  • If it is started from an external source, the JFR events for network packets are now aggregated instead of one event per packet.
Simulation distance
  • Blocks and fluids are now also affected.
  • Increased the lower limit for simulation distance from 2 chunks to 5 chunks.
General
  • Optimized entity collisions.

Fixes[]

28 issues fixed
From released versions before 1.18
  • MC-63340 – Sleeping always resets time until rain.
  • MC-170551Foxes can't spawn on podzol or coarse dirt.
  • MC-187716 – Nether biome surface builder types incorrectly assume the world height is 128 blocks.
  • MC-190285 – "bedrock_roof_position" tag number does not represent height, but height modifier.
  • MC-200494 – In mineshafts, torches can generate attached to blocks other than the wooden supports.
  • MC-216432 – Mineshafts can generate with light but without any torches.
  • MC-216561 – Torches not spawning in abandoned mineshafts under Y=0.
  • MC-238877 – Deep ocean and ocean are not needed for the "Adventuring Time" advancement.
  • MC-238966 – Old growth spruce taiga and old growth birch forest aren't a part of the "Adventuring Time" advancement.
  • MC-238968 – Windswept gravelly hills and windswept savanna aren't a part of the "Adventuring Time" advancement.
From the 1.18 development versions
From the previous development version
  • MC-239854Nether and caves world is missing bedrock.
  • MC-239858 – Nether decorations can be generated on the original bedrock layer.
  • MC-239866 – Terrain shaper in noise_settings is not used.
  • MC-239876Maps appear gray when opened in old terrain after conversion.
  • MC-239882Beacons deactivate when upgrading worlds.
  • MC-239902 – Weather effects appear in caves and structures in 1.17.1 worlds loaded in 21w43a.

Videos[]

Videos made by slicedlime:

References[]

  1. "Minecraft Snapshot 21w44a" – Minecraft.net, November 3, 2021
  2. MC-240481
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