Minecraft:Java Edition 21w44a

21w44a is the eighth and final Minecraft:snapshot for Minecraft:Java Edition 1.18, released on November 3, 2021,<ref>Template:Snap</ref> which improves the upgrading of old worlds, introduces new options, makes some tweaks, and fixes bugs. This is the final snapshot released in 2021.

Additions

World generation

Upgrading of old worlds

• Minecraft: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.<ref>Template:Bug</ref>
• Large biomes and amplified worlds now have an upgrade path, and retain more of their characteristics when upgraded to the new terrain system.

General

Minecraft: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 doesn't show up in server online player listings.
  • Contains the new "Server Difficulty" option, to indicate the difficulty of the current server.

Minecraft:server.properties

• Added hide-online-players, which when set to "True", doesn't send a player list on status requests.

Minecraft:Tags

• Added following block tags to decide the corresponding creatures to spawn:
  • animals_spawnable_on
    • Contains Minecraft:grass block.
  • axolotls_spawnable_on
    • Contains Minecraft:clay.
  • foxes_spawnable_on
    • Contains grass block, Minecraft:snow, Minecraft:snow block, Minecraft:podzol, and Minecraft:coarse dirt.
  • goats_spawnable_on
    • Contains Minecraft:stone, snow, Minecraft:powder snow, snow block, Minecraft:packed ice, and Minecraft:gravel.
  • mooshrooms_spawnable_on
    • Contains Minecraft:mycelium.
  • parrots_spawnable_on
    • Contains grass block, Minecraft:air, #leaves, and #logs.
  • polar_bears_spawnable_on_in_frozen_ocean
    • Contains Minecraft:ice.
  • rabbits_spawnable_on
    • Contains grass block, snow, snow block, and Minecraft:sand.
  • wolves_spawnable_on
    • Contains grass block, snow, and snow block.

Changes

Gameplay

Minecraft: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:

Minecraft:Weather

• Sleeping now only resets the weather cycle if the weather is Minecraft:rain or a Minecraft:thunderstorm.

World generation

Minecraft: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.