Minecraft 1.17.40 Changelog

Experimental Features:

• Added new world/cave generation when upgrading saved chunks below "Y=0" using the Caves & Cliffs experimental toggle
  • Chunks previously upgraded with Bedrock underneath will not see this change
• Added a new mountain biome: Stony Peaks!
  • This is a variant of lofty/snow-capped peaks that uses stone and gravel instead of snow and ice, and is used to avoid temperature clashes such as a snow-capped peak sticking up from a jungle 
• Corrected vegetation in Mountain Meadows
• Dripstone Clusters can now only be found in the Dripstone biome
• Dripstone features now only generate in Dripstone biome
• Mountain biomes now have correct feature places to match the Java Edition side-snapshot
• Infested Stone can be found under new mountains
• Tweaked ore distribution to match the Java Edition side-snapshot
• Clouds are now at Y level 192
• Tweaked biome placement, river size, and terrain shapes for a better overworld experience 
• Tweaked mob spawning in mountain and cave biomes to match the Java Edition side-snapshot 
• Trees in swamps can now generate slightly deeper when in water
• Deepslate now generates at lower depths
• Dripstone features now generate at Deepslate depths
• The placement logic of Small Dripstone feature has been refactored so frequency is similar but exact positions will differ
• Copper Ore now generates up to y=96 instead of y=64
• Flat worlds with the Caves & Cliffs experimental toggle enabled will properly upgrade to use the new dimension heights
• 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"
• Maps now correctly show the colors of blocks below a Y level of zero
• Vines now generate in Lush Caves instead of generating above the surface 
• Vines can now grow down below zero height
• Villages now generate in the style of the biome they are located in

Changes:

• New achievements screens are now available on Windows 10 ARM-based PCs

Fixes:

Performance / Stability

• Fixed a crash that could occur when using Character Creator
• Fixed a softlock that could occur when on the Realms world slots screen and the internet connection was lost

General

• Fixed an issue causing Marketplace downloads on Nintendo Switch to fail after entering and leaving a world
• World settings are now carried over on to Realms when replacing worlds

Gameplay

• Fixed a most unfortunate issue that caused players to be set on fire upon changing dimensions if there was Lava underneath the Nether Portal
• Improved world visibility culling for underground situations to eliminate seeing sky at the end of tunnels/stairs
• Players can no longer eat food at full hunger in Survival mode
• Amethyst geodes are now much less likely to generate in Strongholds, and if they do they will not destroy End Portals
• Dungeons are no longer misplaced or missing outside of the Caves & Cliffs experimental toggle
• Vanilla Parity: Players are now able to activate Elytra gliding while moving upward

Mobs

• Tropical Fish no longer lose their colors upon grabbing them with a Water Bucket and then releasing them
• Bees now spawn properly in the world
• Mobs no longer casually stroll into open flames
• Villagers can no longer spam doors open and closed
• Cartographers now more consistently give new maps on all platforms
• Improved mob pathing around partial blocks
• Armor no longer renders on Pillagers and Vindicators, but the mobs are still granted armor effects
• Fixed an issue with mob rendering that caused Vindicator Axes to be visible even when they're not attacking on older Resource Packs
• More mobs will now spawn underground in the Overworld
• Fixed failure to render Leads when attached to mobs out of view
• Iron Golems now spawn only on solid blocks

Blocks

• Falling Stalactites are now offset properly to avoid interacting with entities outside their intended hitbox
• Beehives now generate in the world facing South
• Trapdoors now rotate correctly when loaded from a Structure Block
• Powder Snow no longer disappears when looking at it from a distance
• Sea Grass no longer spawns under Lily Pads during world generation to avoid breaking them
• Holding Top Snow in hand while hovering over Grass Blocks no longer causes incorrect behavior

User Interface

• Riding an animal now displays the correct button prompt when playing with non-touch controls
• Using Dye on Signs that contain formatted color text will now overwrite the formatted color text
• 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
• Altered the message that is displayed when players change skins in-game
• Fixed an issue where the D-pad and directional keys could not be used to navigate in certain parts of the user interface
• Fixed an issue where an error message could be shown after suspending the game on the Achievements screens with Screen Animations disabled
• Fixed an issue where an obscure game rule was added to Settings
• The sign in text on the main menu no longer overlaps the Marketplace button
• Added space between tab title and the word 'Tab' for text-to-speech on Settings screen
• Added a "More Info" button to the sign in error screen

Realms

• All changes to settings made on new worlds before creation are now transferred to the world after creation

Character Creator

• In Character Creator, tweaked color tint for the default Steve skin to match default Steve
• Back appearance pieces will no longer cover the left and right arrows in the profile screen
• 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 the player’s character

Commands

• Education Edition items are no longer shown as an option when using @e[type=]
• Command Blocks with 'Needs Redstone' and a non-zero 'Delay in Ticks' will now execute only if they remain powered for the delay duration
• Fixed alignment of the sidebar display from the '/scoreboard' command when text length changes
• Fixed the ability to summon experience orbs via the '/summon' command
  

Technical Updates:

Fixes

• Fixed display only entity destruction in chunk discard scenarios
• Fixed a bug that caused animations to be restarted when changing render controllers

Data-Driven Blocks 

• Updated documentation for the Block Rotation component
• Updated documentation for 'BlockExplosionResistance'
• Added required toggles to documentation and to content error for block components

Graphical

• Added a content error for using a material but not providing the required number of textures to the render controller

Molang 

• Fixed 'item_remaining_use_duration'having improperly scaled or inverted results (This fix is a Versioned Change as of engine version 1.17.30)
• Add new compile errors for expressions like 'text' + 3, which were previously ignored (This is a Versioned Change as of engine version 1.17.40)
• Molang expressions that contain capital letters are properly evaluated now
• 'query.get_equipped_item_name' will now recognize Sea Lanterns
• Added 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) 

• Renamed method 'succeedWhenBlockTypePresent' to 'succeedWhenBlockPresent'
• Fixed a bug where property id would return "Unknown" for custom entities
• Identifier strings returned from property id now include the item's namespace
• 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 'inventory'now works with Player inventories

GameTestSequence 

• Removed method 'thenWaitWithDelay'
• Added method 'thenWaitAfter(delayTicks: number, callback: () => undefined)'- After a delay, executes the given callback every tick until it succeeds. Exceptions thrown within the callback will end sequence execution

Player 

• Fixed a bug where the location property would return an incorrect height for players
• Added property 'id'

Block 

• Replaced method 'getLocation' with property 'location'
• Replaced method getPermutation with property 'permutation'
• Replaced method 'getType' with property 'type'
• Replaced methods 'isWaterlogged' and 'setWaterlogged' with property 'isWaterlogged'
• Replaced method 'getBlockData' with property 'permutation'
• Replaced method 'isEmpty' with property 'isEmpty'
• Removed property 'canBeWaterlogged'

BlockType

• Replaced method 'getName' with property 'id'
• Replaced method 'canBeWaterlogged' with property 'canBeWaterlogged'

BlockPermutation

• Replaced method 'getType' with property 'type'