Java Edition 20w17a

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 "footer": "<table style=\"margin: auto; word-break: break-word;\">\n<tr style=\"background: inherit;\">\n<td style=\"padding: 0.4em\" >[[Java Edition 1.15.2|<span style=\"margin-right:-0.35em\">◄</span>◄  1.15.2]]</td>\n<td style=\"padding: 0.4em\">'''[[Java Edition 1.16|1.16]]'''</td>\n<td style=\"padding: 0.4em\" >[[Java Edition 1.16.1| 1.16.1 <span style=\"margin-right:-0.35em\">►</span>►]]</td>\n</tr>\n<tr style=\"background: inherit;\">\n<td style=\"padding: 0.4em\">\n[[Java Edition 20w16a|◄  20w16a]]\n</td>\n<td style=\"padding: 0.4em\">''' 20w17a'''</td>\n<td style=\"padding: 0.4em\">\n[[Java Edition 20w18a| 20w18a ►]]\n</td>\n</tr>\n</table>"
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20w17a is the thirteenth snapshot for Java Edition 1.16, released on April 22, 2020,^[1] which added the /attribute command, tweaked bastion remnant loot, and lowered the spawn rate of ruined portals, along with bug fixes.

Commands

• Added the /attribute command.
  • Used to get, set, or modify attributes.
  • Syntax:
    • attribute <target> <attribute> get [<scale>]: get total value of attribute
    • attribute <target> <attribute> base set <value>: sets base value
    • attribute <target> <attribute> base get [<scale>]: get base value
    • attribute <target> <attribute> modifier add <uuid> <name> <value> (add|multiply|multiply_base): adds modifier (fails if modifier is already present)
    • attribute <target> <attribute> modifier remove <uuid>: removes modifier
    • attribute <target> <attribute> modifier value get <uuid> [<scale>]: get value of modifier
  • Parameters:
    • <target>: single entity (note: only players, armor stands and mobs have attributes)
    • <attribute>: name of attribute (like minecraft:generic.max_health)
    • <name>: string (in optional quotes) describing human-readable name of modifier
    • <value>: floating point value (note: certain attributes have limits on final value, so the change might not be noticeable)

Options

• Added an "Entity Distance" scale option ranging from 50% to 500%.
  • Sets the distance at which mobs render into frame.

Tags

• Added pressure_plates block tag.
  • Contains light and heavy weighted pressure plates, as well as the #wooden_pressure_plates and #stone_pressure_plates block tags.
• Added stone_pressure_plates block tag.
  • Contains stone and polished blackstone pressure plates.

Sounds

• Added new sounds for chains.

World creation

• Difficulty and game rules can now be changed from the "Create World" screen.

Furnaces

• Breaking a furnace now gives the experience for the smelted things inside.

Gilded blackstone and Nether gold ore

• Now use the same sounds as Nether quartz ore.

Smithing tables

• Improved UI.
  • Added an ingot outline to the second input slot.
  • Added a hammer icon above the input slots, similar to the anvil UI.

Soul fire lanterns and soul fire torches

• Renamed "Soul Fire Lantern" and "Soul Fire Torch" to "Soul Lantern" and "Soul Torch", respectively.
• IDs have been changed from soul_fire_torch and soul_fire_lantern to soul_torch and soul_lantern, respectively.

Walls

• Now change into posts when pressure plates and banners are placed on them.

Bastion remnants

• Loot has been tweaked.
  • Ancient debris and netherite scraps have been made generally rarer.
  • Netherite gear can no longer be found in bastion remnants; instead, diamond gear is found.
  • The chances and stack sizes of various items have been tweaked.

Ruined portals

• Now spawn about 30% less frequently.

Creative inventory

• Inventory tab names, which appear in the description of items when in the Search tab, now display in boldface.
  • Other information, such as tag names, are now displayed in boldface as well.
• Netherite ingots and netherite scrap have been moved next to iron and gold ingots.

Block storage format

• Format in chunks has been slightly changed to speed up various tasks (rendering, pathfinding, world generation, etc.).
  • BlockStates in Sections elements no longer contain values stretching over multiple 64-bit fields.
    • If the number of bits per block is not the power of two (i.e. single 64-bit value can't fill the whole number of blockstates) some bits aren't used.
    • For example, if a single block state takes 5 bits, the highest 4 bits of every 64-bit field are unused. That also means a slight increase in storage size (in case of 5 bits, from 320 to 342 64-bit fields).

Fonts

• Chat component style now supports font property, which is a resource location for the font in the resource pack. No entry is equivalent to minecraft:default.
• Full range of Unicode characters is supported, making it possible to type emojis and other Unicode characters outside of the Basic Multilingual Plane.
  • However, custom resource packs must be used to display correct characters instead of tofu, due to the lack of these characters in the default font.
• Force Unicode option now switches between normal and alternative font (called uniform.json) - no reload needed.

Main menu

• The "Singleplayer" button jumps directly to the "Create World" screen if there are no worlds to select.

Raw JSON text format

• The JSON color component now supports 6-digit hexadecimal colors to specify custom colors other than the 16 default color codes.
  • Example: /tellraw @a {"text":"Turquoise output","color":"#00ff88"}
• The hoverEvent chat component now uses the parameter contents, with contents depending on type:
  • For show_text - chat component
  • For show_item - either item id or object with fields id, count and tag (with last one being serialized NBT)
  • For show_entity - object with fields: id (UUID), name (chat component) and type (entity type resource location)
  • The value argument is now deprecated, but still supported.

Tags

• Changed the wall_post_override block tag to include the banners and pressure_plates block tags.

UI

• Changed checkbox texture.

World save format

• Saving level.dat now uses randomly-named temporary files (instead of using level.dat_new every time).
• player/*.dat are now saved in a way similar to level.dat (including leaving .dat_old files).

52 issues fixed

From released versions before 1.16

• MC-1601 – Breaking a furnace will not give the player experience for the smelted things inside.
• MC-5410 – In creative mode, flying down is stopped when brushing up against ladders or vines.
• MC-31032 – Using only one empty map does not increase minecraft.used:minecraft.map.
• MC-46417 – Sprint particles are emitted in spectator mode.
• MC-56373 – Selector and score text components do not work on hoverEvents.
• MC-63020 – Some chunks are not rendered in the first person from some angles in certain situations (incorrect frustum culling).
• MC-94535 – Flying and holding close to the ground emits walking particles.
• MC-96319 – Mob pathfinding AI does not regard some blocks as obstructions and is unable to pathfind on top of them.
• MC-108598 – Client rendering other player or mob holding compass influences compass of user.
• MC-114544 – Kicked by "Flying is not enabled on this server" while sleeping.
• MC-117710 – Bonus Chest setting is not copied when re-creating world.
• MC-117805 – Oak trees can generate right below height limit (y = 256) resulting in an incomplete tree.
• MC-120572 – /recipe crashes the game.
• MC-126244 – /locate, explorer maps, and treasure maps can cause extreme TPS lag, even leading to a complete server freeze if structure generation is turned off.
• MC-131360 – Music sometimes stops abruptly when you go underwater.
• MC-132926 – The width of an advancement's description depends on the first line.
• MC-135738 – Bossbar names that have scores don't update as intended after exiting and re-entering the world.
• MC-144622 – Using /data modify to set the name from a block only works once.
• MC-149704 – Sneaking/crouching twice makes player sprint.
• MC-149792 – Client book length mismatch resulting in crash.
• MC-151364 – Feeding a dolphin causes a crash when structure generation is turned off.
• MC-169514 – Tamed parrots cannot be renamed unless they are flying.
• MC-170075 – "Online play is not rated" checkbox has no outline when focused.
• MC-171939 – Many mobs are placed incorrectly in the statistics.
• MC-176104 – Dropped compasses always point up.
• MC-177346 – A compass in a mob's hand does not point to correct location if the mob turns.

From the 1.16 development versions

• MC-171561 – Only one player can access a shulker box at a time.
• MC-174359 – Piglins prefer using an unenchanted gold item instead of an enchanted gold item.
• MC-174473 – Nether gold ore uses stone sound effects.
• MC-175113 – Rain prevents entities from burning in fire.
• MC-175186 – Respawning does not check if the "respawn block" is the correct one for the dimension.
• MC-175998 – Striders move very fast between two blocks or when diagonally running into blocks.
• MC-176029 – Right clicking a lodestone with a stack of compasses converts the whole stack.
• MC-176060 – Recipe book does not load the entire empty map recipe anymore.
• MC-176116 – Saddle texture on strider is backwards.
• MC-176348 – Cartographer villagers cannot trade explorer maps.
• MC-176521 – Pressing space while the recipe book button is highlighted in crafting interfaces does not toggle the recipe book.
• MC-177776 – Netherite ingots are not sorted properly with other ingots.
• MC-177780 – Shulkers cannot be opened while playing closing animation anymore.
• MC-177796 – Blackstone walls are in the "Building Blocks" category instead of "Decoration Blocks" category, unlike all other walls.
• MC-177862 – Polished blackstone button and pressure plate are in incorrect area of the Creative inventory.
• MC-177885 – Invisible horses show patterns.
• MC-177997 – Baby zoglins still deal the same attack damage as an adult.
• MC-178050 – New Nether music is inconsistently loud.
• MC-178086 – Flying close to the ground with soul speed over soul blocks speeds up the player and emits soul particles.
• MC-178093 – Piglins with full inventories will not pick up gold ingots to barter, even though you can still right-click to barter with them.
• MC-178259 – Game crashes when an iron golem with the attack damage attribute is set to 0.5d.
• MC-178316 – Dispenser plays "dispensed item" sound when attempting to charge a full respawn anchor instead of "dispenser fails".
• MC-178630 – TNT eye height changed.

From the previous development version

• MC-178797 – Barrier blocks generate in bastion remnant.
• MC-178955 – Badlands are viewed as a mountainous biome for ruined portals.
• MC-179542 – Basalt delta blocks override Nether bricks in fortresses.