Minecraft Snapshot 21w11a

An absolutely shocking snapshot arrives! This snapshot adds some new functionality to Copper, some general tweaks, a fancy new way of getting performance metrics, and a bunch of bugfixes.

Happy mining!

New Features in 21w11a#

• Lightning rods can now, for the very first time ever, be waterlogged
• New functionality for applying and removing wax from copper
• Bonemealing rooted dirt now grows hanging roots underneath

Waxing Copper and Oxidization#

• Right click with honeycomb on copper blocks to wax them
• Use honeycomb in a dispenser to wax copper blocks
• Axes can scrape off wax and oxidation of copper blocks
• Lightning strike hitting copper will clean its oxidation

Changes in 21w11a#

• Waxed copper blocks can be crafted into 4 copper ingots
• Tweaked the cave sizes
• Slightly increased the frequency of diamond ore blobs
• Hanging roots block now renders randomly offset
• Breaking a Big Dripleaf stem now drops a Big Dripleaf block
• Moss blocks can be crafted with cobblestone or stone bricks to make the mossy versions of those blocks
• The facing direction of Small Dripleaf blocks is now determined by which direction the player is facing when placing it
• Fully-grown Amethyst Clusters now drop 4 Amethyst Shards (or more with Fortune) when mined with a pickaxe, and drop 2 Amethyst Shards when broken by hand, piston, or other means

Technical Changes in 21w11a#

• Added F3+L shortcut to generate and persist performance metrics from in-game

In-game client metrics reporting#

Pressing F3+L while in the game will start a recording for 10 seconds capturing metrics such as tick durations, used heap sizes and other more detailed stats. These will be saved to a zip file in debug/profiling/<yyyy-MM-dd_HH.mm.ss>.zip and could be used for performance regression analysis if included in bug reports.

The exact metrics, output format and names are susceptible to change between versions, and our plan is to continue iterating on which metrics to capture.

Fixed Bugs in 21w11a#

• MC-1483 Snow covered grass/podzol/mycelium block side texture does not match original block
• MC-12363 Lava / water / powder snow bucket desync when using it while rapidly turning
• MC-70850 False negatives during occlusion culling
• MC-71530 Spectators can't see through lava
• MC-145501 Librarian and zombie librarian torso top texture is incorrect
• MC-150054 Spectral arrow texture on item and entity aren't consistent
• MC-150784 Brewing Stand bottle outline incorrect
• MC-154006 Overworld wood signs use the outdated wood texture on all sides
• MC-160195 Jungle door inventory texture is outdated
• MC-160388 Painting back texture has not been updated with the texture update
• MC-195806 Smoker's top and bottom textures have inconsistently colored pixels
• MC-197561 Carved pumpkins and jack o'lanterns create swastikas
• MC-197883 Jigsaw Structures causing DataFixer spam
• MC-198805 Floating pixel in the tailfin of a guardian/elder guardian
• MC-202760 Area effect cloud does not enforce a maximum radius
• MC-203554 block.amethyst_block.chime has no subtitle
• MC-203561 Amethyst crystal cluster drops items when block is moved directly by a piston without actually breaking the block
• MC-203623 Inconsistency: Breaking amethyst crystals with hands doesn't drop the item, but breaking the block they are placed on drops them
• MC-203676 Tinted Glass suffocates entities inside of it
• MC-203753 Spyglass use statistic never increases