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
• MC-203918 Mobs can spawn on tinted glass
• MC-204016 When filling a lava cauldron with lava, the lava is placed on the ground, not in the cauldron. This also affects powder snow.
• MC-204862 Tinted glass is not included in the impermeable tag
• MC-205913 Lightning rod can spawn skeleton horses with skeletons
• MC-206787 World Border is rendered upside down
• MC-207557 Frozen hearts in hardcore mode look identical to frozen hearts in survival mode
• MC-211513 Trident returning to owner not in the same world can cause permanent player kick
• MC-212123 Player lighting is inconsistent in the inventory and appears darker on the front
• MC-212226 Bone Meal can still be used on a Glow Lichen when it is unable to grow
• MC-212410 Cannot compost glow lichen
• MC-213743 Spectators can't see through powder snow
• MC-213764 Removing the block supporting a spore blossom allows the spore blossom to float
• MC-213765 Cave vine blocks are inconsistent in ID from other similar blocks
• MC-213768 Removing the support block for hanging roots allows it to float
• MC-213778 Cave vines cannot be climbed
• MC-213782 Cave vines do not slow you down like other vines
• MC-213798 Cave vines head and body emit different light levels
• MC-213886 Bone meal cannot be used on dripleaf stems
• MC-213911 Cave vines body and cave vines head share the same name
• MC-213980 Moss appropriate tool is axe rather than hoe
• MC-214568 Setting a lectern on fire causes z-fighting
• MC-215036 Snow layers in "Snowy Kingdom" superflat preset generate 64 blocks above the ground
• MC-215384 Azaleas cannot be used as a fuel
• MC-216134 Gilded blackstone texture does not match the new side texture of blackstone
• MC-216184 Player takes no fall damage on blocks above y=316
• MC-216227 Sugar cane item texture is no longer accurate from 13w36a forward
• MC-216737 When replacing tuff, ores still generate with a "stone" background below y=0
• MC-216945 Teams become dysfunctional when any entity leaves the team
• MC-216965 Flat "slices" of terrain generating in cracks
• MC-217303 Potential optimization target in DepthBasedReplacingBaseStoneSource
• MC-217546 stat.fallOneCm is not updated when falling onto a block above y=316
• MC-217802 Some blocks generate at wrong Y height in a superflat world
• MC-218587 Lightning rod still can't be waterlogged
• MC-218594 Debug chunk borders don't render properly
• MC-218596 Debug pie is blacked out
• MC-218597 Water has no fog anymore
• MC-218603 Screen turns dark grey when switching dimension
• MC-218604 Hanging roots can generate hanging on other hanging roots, making them float
• MC-218609 Mipmapping causes some block faces to become too dark
• MC-218610 Banners are unimpacted by light levels
• MC-218626 Cannot enchant items
• MC-218635 With fast graphics, the freezing overlay renders black, and covers the whole screen black in first person
• MC-218640 Broken spyglass overlay on fast graphics
• MC-218641 Red vignette shown when outside the world border is too intense
• MC-218645 The carved pumpkin overlay turns the screen completely black when using fast graphics
• MC-218652 The green nausea overlay no longer renders
• MC-218653 Glowing effect no longer changes to team color
• MC-218655 Floating water generates excessively in lush caves
• MC-218660 The nether portal overlay no longer renders, whilst using fast graphics
• MC-218695 Shulkers do not flash red when hurt or killed
• MC-218712 Debug pie has purple box when moving an enchanted item
• MC-218713 Right clicking to open alternate recipes does not show the recipes
• MC-218729 Noise cave entrances cause unnatural, smooth edges in terrain
• MC-218734 Caves generate with very blocky areas
• MC-218748 At sunset, a blue line appears in the northern and southern skies
• MC-218753 Ambient occlusion of the player seen in the survival inventory has changed
• MC-218765 Glowing effect no longer renders around translucent pixels
• MC-218793 Two white lines appear on the Mojang loading screen
• MC-218817 Cave Vines can generate without supporting blocks
• MC-218825 M1 ARM Macs crash when using Fabulous Graphics mode as was the case in older versions, but no lack of support warning is shown
• MC-218830 World border is white
• MC-218834 You can see block hitboxes very clearly whilst in powder snow/lava
• MC-218845 Mojang logo screen flashes blue before changing to red
• MC-218852 World border is occasionally shown as a solid color upon being loaded
• MC-218877 The red flash when a mob is hurt/killed appears to be slightly dimmed
• MC-218881 When selecting text in the end, the sky gets highlighted
• MC-218911 The background of hover-event text becomes blue when text is selected in an anvil or chat
• MC-218945 Spyglass has a gradient effect while freezing
• MC-218979 Cave ceilings and floors sometimes too flat or blocky
• MC-218988 Fire is rendered dark in the player/horse/llama UI
• MC-218990 Transparency buffers start with blue background instead of empty background
• MC-219002 The wither's wither armor has a blue aura around it
• MC-219006 The background opacity of subtitles and chat, are affected by a potion effect UI fading out
• MC-219014 Charged creeper layer makes clouds and entities invisible
• MC-219036 World border is shown as a solid color when picking up items or experience orbs
• MC-219039 World border does not render when below the world
• MC-219049 Reloading resource packs no longer shows the progress bar while the transparent background is shown
• MC-219105 Entity hitboxes can be seen whilst inside of powder snow/lava
• MC-219108 Chat scroll bar is offset
• MC-219111 Social interactions scroll bar appears broken
• MC-219126 Xray with spyglass
• MC-219155 Cast fishing line is disconnected from the rod
• MC-219180 Slime blocks, honey blocks, stained glass, and ice are fully lit when moved by pistons
• MC-219208 Xray using enchanted items
• MC-219212 Entity shadows can be seen whilst inside of powder snow/lava
• MC-219224 The background opacity of command syntax help is affected when highlighting text
• MC-219278 Being inside of a block no longer shows the block texture
• MC-219281 Dying ender dragon is rendered too bright
• MC-219392 Lead/fishing line is no longer affected by the fog from powder snow/lava
• MC-219597 End portal and end gateway textures expand as the player travels further from the block