Java Edition 21w44a

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

World generation

 * Old worlds upgrading
 * New world generation is now inserted under existing chunks when upgrading a world to the new world height.

General

 * Options
 * Added Online Options, as a separate screen, replace the place of option "Realms Notifications".
 * "Realms Notifications" option has moved into it.
 * Contains the new "Allow Server Listings" option.
 * When activated, the player name will not show up in server online players listings.
 * Contains the new "Server Difficulty" option, to indicate the current difficulty which server at.


 * server.properties
 * Added, to decide not send a player list on status requests.

Gameplay

 * Weather
 * Sleeping now only resets the weather cycle if the weather is rain or a thunderstorm.

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.


 * General
 * Optimized entity collisions.