Minecraft 1.17.40.21 Changelog

Experimental Features

• Added new world/cave generation when upgrading saved chunks below Y=0 using the Caves and Cliffs experimental toggle
  • Chunks previously upgraded with Bedrock underneath will not see this change

Flat World Generation

• Upgrades older flat worlds to the new extended heights available with the Caves & Cliffs experimental toggle
• New flat worlds using the Caves & Cliffs experimental toggle will generate starting at "y=-64"

Gameplay

• Fixed an issue in beta builds where flying above the world limit (255 for non-Caves & Cliffs experimental, 319 for Caves & Cliffs experimental) would be prohibited

Copper Ore

• Copper Ore now generates up to y=96 instead of y=64

Non-Experimental Features and Bug Fixes

General

• Holding Top Snow in hand while hovering over Grass Blocks no longer causes incorrect behavior
• Bee Nests now generate correctly in the world
• Non-fireproof mobs now avoid pathing through fire

Gameplay

• Vanilla Parity: Players are now able to activate Elytra gliding while moving upward
• Using Dye on Signs that contain formatted color text will overwrite the formatted color text

World Generation

• Fossils are now much less likely to generate in, and destroy, structures
• Dungeons are no longer misplaced or missing outside of the Caves & Cliffs experimental toggle

Mobs

• Iron Golem now spawns only on solid blocks
• Wielded weapons now render properly on Pillagers and Vindicators

User Interface

• Riding an animal now displays the correct button prompt when playing with non-touch controls

Character Creator

• Back appearance pieces will no longer cover the left and right arrows in the profile screen
• Fixed featured items in the profile screen not opening the featured catalog in the Dressing Room
• Fixed default clothes changing color if another item’s color was edited previously
• Sidebar options can now be selected in expanded view after navigating back from previously selected sidebar option while using controller
• Sidebar no longer opens upon expanding any of the classic skin packs in the Dressing Room
• Improved the navigation flow for Character Creator so that it always switches to the selected Character Creator profile
• Skins that are equipped from Marketplace while in-game now apply to character

Technical Updates

Animation

• Fixed a bug that caused animations to be restarted when changing render controllers

Graphical

• Fixed text on Signs losing their formatting when new lines or word-wrapping are encountered. Formatting will now persist until the reset code or an overriding code is found. This is not retroactive and previously created Signs will not be changed

Graphics

• As part of continued testing, removed RenderDragon engine on Android devices (ARMv7)

Molang

• Molang expressions that contain capital letters are properly evaluated now
• 'query.get_equipped_item_name' will now recognize Sea Lantern
• Add new compile errors for expressions like 1 + (9 10), which were previously ignored (This is a Versioned Change as of engine version 1.17.40)

GameTest Framework (Experimental)

• Updated the GameTest Framework interface and added a new SimulatedPlayer capability:
  • Added 'SimulatedPlayer'class to GameTest. This class enables GameTest to simulate a variety of player behaviors such as movement, using items, and interacting with blocks and entities.
    • Added function spawnSimulatedPlayer(blockLocation: BlockLocation, name: string): SimulatedPlayer
    • Added function 
      removeSimulatedPlayer(simulatedPlayer: SimulatedPlayer): void
  • mojang-gametest.Test type
    • Changed signature of function assertEntityInstancePresent(entity: Entity, blockLocation: BlockLocation, isPresent: boolean = true)
  • mojang-minecraft components
    • Component inventorynow works with Player inventories