Java Edition 17w43a

17w43a is the first snapshot released for Java Edition 1.13, adding the first features of what was then called "Technically Updated". Although this is the first snapshot of 1.13, no Update Aquatic features were implemented yet because at the time the Update Aquatic was set to be released as 1.14 instead of 1.13, and as such snapshots from 17w43a to 18w06a mainly add or modify commands.

General

 * Data packs
 * Like resource packs, but for loot tables, advancements, functions, and structures.
 * Used by placing them into the  folder of a world.
 * Data packs are  files or folders with a   in the root. See Tutorials/Creating a resource pack for more info.
 * Structures will load from  before checking data packs.
 * However, this directory should not be used to distribute structures. Instead, move these files into data packs.
 * Reloadable using.
 * Structure:,   folder containing a namespace folder determining the namespace of its contents.
 * A namespace should only contain the following symbols: 01​​234​5​6​78​9abcdefghijklmnopqrstuvwxyz-_.
 * Inside the namespace folder, there can be folders for,  ,   and.


 * Options
 * FS (Fullscreen) Resolution
 * Is used to change the resolution.

General

 * Controls
 * The name of keybindings now describes the actual key (e.g. 'LBUTTON' is changed to 'Left Button' and 'BACKSLASH' is changed to '\').


 * Options
 * Removed 3D Anaglyph completely.


 * Other
 * Game library updates
 * Upgraded to LWJGL 3.1.2
 * Loading or creating a world shows the percentages of the loading stages.
 * now shows as a loading stage.


 * Resource packs
 * The default resource pack can now be moved up and down, just like other resource packs.

Video
Video made by slicedlime:

Trivia

 * 17w43a was released exactly 5 years after the Pretty Scary Update, and exactly 4 years after The Update that Changed the World.