Java Edition 18w19a

18w19a is the thirty-third snapshot for Java Edition 1.13, released on May 8, 2018,^[1] which added the Dolphin's Grace effect and changed some IDs, mainly to biomes.

Effects

• Dolphin's Grace.
  • Acquired by swimming near dolphins.
  • Makes the player swim faster.

Logic

• Separated some of the logic for blocks and fluids.^[2]
  • Current fluids:
    • minecraft:empty
    • minecraft:flowing_water
    • minecraft:water
    • minecraft:flowing_lava
    • minecraft:lava
  • The fluid at a location is currently dependent on the block at the location; currently there still are water and lava blocks.
• Added two new fluid tags: minecraft:lava and minecraft:water.
• This system is mostly internal; it cannot be directly interacted with yet.

Buffet worlds

• New generation type: "Caves".
  • Creates Nether-like generation.

Block IDs

• Changed names and IDs of several blocks:

Old name	New name
Sea Grass	Seagrass
Tall Sea Grass	Tall Seagrass
Old ID	New ID
sea_grass	seagrass
tall_sea_grass	tall_seagrass

Turtle eggs

• Changed texture.

Spawn eggs

• Phantom spawn eggs now look more like the mob's updated texture.

Heart of the sea

• Now generates in buried treasure chests (as stacks of 1).

Item IDs

• Changed names of several items:

Old name	New name
Clownfish	Tropical Fish
Puffer Fish Bucket	Pufferfish Bucket

Swimming

• All undead mobs (except for zombie horses)^[3] now sink.
• Husks morph into zombies after a while if they are in water.
• Skeleton horses are now rideable underwater.

Phantoms

• Now flap their wings smoother and faster.
• Now drop experience.

Parrots

• Now imitate phantoms and drowned.

Dolphins

• If dolphins start drowning, they now swim to the surface.

Polar bears

• Can now spawn on top of ice.

Pufferfish

• Changed the name and ID of the pufferfish mob:

Old name	New name
Puffer Fish	Pufferfish
Old ID	New ID
puffer_fish	pufferfish

Incompatibilities

• Due to changes in world generation, worlds from previous snapshots no longer work.

Seagrass

• Now generates in underwater caves.

/seed

• The output of the command can now be copied.

Improvements

• Improved the upgrade paths from old versions.

Credits

• Updated the credits list.

Experience orbs

• Now floats up in water.

Advancements

• "How Did We Get Here?" now includes the Conduit Power status effect.

Sounds

• New sounds for conduit and beacon.

Debug screen

• The F3 menu now shows the biome ID, rather than name.

Biomes

• Changed the names of several biomes:

Resource location	Old name	New name
extreme_hills	Extreme Hills	Mountains
swampland	Swampland	Swamp
ice_flats	Ice Plains	Snowy Tundra
ice_mountains	Ice Mountains	Snowy Mountains
mushroom_island	Mushroom Island	Mushroom Fields
mushroom_island_shore	Mushroom Island Shore	Mushroom Field Shore
forest_hills	Forest Hills	Wooded Hills
smaller_extreme_hills	Extreme Hills Edge	Mountain Edge
stone_beach	Stone Beach	Stone Shore
cold_beach	Cold Beach	Snowy Beach
roofed_forest	Roofed Forest	Dark Forest
taiga_cold	Cold Taiga	Snowy Taiga
taiga_cold_hills	Cold Taiga Hills	Snowy Taiga Hills
redwood_taiga	Mega Taiga	Giant Tree Taiga
redwood_taiga_hills	Mega Taiga Hills	Giant Tree Taiga Hills
extreme_hills_with_trees	Extreme Hills+	Wooded Mountains
mesa	Mesa	Badlands
mesa_rock	Mesa Forest Plateau	Wooded Badlands Plateau
mesa_clear_rock	Mesa Plateau	Badlands Plateau
sky_island_low	The End - Floating islands	Small End Islands
sky_island_medium	The End - Medium island	End Midlands
sky_island_high	The End - High island	End Highlands
sky_island_barren	The End - Barren island	End Barrens
warm_deep_ocean	Warm Deep Ocean	Deep Warm Ocean
lukewarm_deep_ocean	Lukewarm Deep Ocean	Deep Lukewarm Ocean
cold_deep_ocean	Cold Deep Ocean	Deep Cold Ocean
frozen_deep_ocean	Frozen Deep Ocean	Deep Frozen Ocean
mutated_desert	Mutated Desert	Desert Lakes
mutated_extreme_hills	Mutated Extreme Hills	Gravelly Mountains
mutated_taiga	Mutated Taiga	Taiga Mountains
mutated_swampland	Mutated Swampland	Swamp Hills
mutated_ice_flats	Ice Plains Spikes	Ice Spikes
mutated_jungle	Mutated Jungle	Modified Jungle
mutated_jungle_edge	Mutated Jungle Edge	Modified Jungle Edge
mutated_birch_forest	Mutated Birch Forest	Tall Birch Forest
mutated_birch_forest_hills	Mutated Birch Forest Hills	Tall Birch Hills
mutated_roofed_forest	Mutated Roofed Forest	Dark Forest Hills
mutated_taiga_cold	Mutated Cold Taiga	Snowy Taiga Mountains
mutated_redwood_taiga	Mega Spruce Taiga	Giant Spruce Taiga
mutated_redwood_taiga_hills	Mutated Redwood Taiga Hills	Giant Spruce Taiga Hills
mutated_extreme_hills_with_trees	Mutated Extreme Hills+	Gravelly Mountains+
mutated_savanna	Mutated Savanna	Shattered Savanna
mutated_savanna_rock	Mutated Savanna Plateau	Shattered Savanna Plateau
mutated_mesa	Mesa (Bryce)	Eroded Badlands
mutated_mesa_rock	Mutated Mesa Forest Plateau	Modified Wooded Badlands Plateau
mutated_mesa_clear_rock	Mutated Mesa Plateau	Modified Badlands Plateau
hell	Hell	Nether

99 issues fixed

From released versions before 1.13

• MC-7908 – Spawning underwater / In the middle of an (lava) ocean
• MC-86016 – Some Mojang staff not mentioned in credits.txt
• MC-118072 – Redwood Taiga Hills M Biome misnamed

From the 1.13 development versions

• MC-121285 – Crash on start when resolution is changed in profile
• MC-121636 – Server commands available in singleplayer with weird/bad effects
• MC-121661 – Typing /help + unavailable command returns "unexpected error" message
• MC-121799 – Cannot summon lightning bolt
• MC-121999 – Incorrect /help behavior for non-ops
• MC-122557 – Setting the size parameter for the dust particle to 0 or very close to it crashes the game
• MC-122596 – Command autocomplete overrides command history navigation
• MC-122630 – /help no longer prefixes "/" to commands
• MC-122632 – /help entries for subcommands do not print main command prefix
• MC-123053 – Game crashes when using an item with a tag in the CanDestroy or CanPlaceOn NBT tag
• MC-123606 – Server crash: Ticking entity 'java.lang.ClassCastException: ass cannot be cast to aui'
• MC-123778 – Team color doesn't work in playerlist and sidebar before reconnecting
• MC-123813 – Team colors no longer show in json results
• MC-123835 – Colored sidebar display slots are not visible
• MC-123852 – Glowing effect doesn't change depending on team color
• MC-123856 – Clicking [Intentional Game Design] on death screen doesn't open a link to MCPE-28723
• MC-124091 – Team color doesn't affect name above head
• MC-124092 – Some team options don't work
• MC-124098 – jeb_ sheep don't change color
• MC-124102 – Book signing shows the author name as string representation of the textcomponent
• MC-124147 – Zombie horses are invisible and replaced with regular zombies on reload
• MC-124237 – Command syntax help doesn't clamp to the right chat line border
• MC-124560 – Server says "type help or ?" but ? is not a valid command anymore
• MC-124633 – Feedback text for "/team option seeFriendlyInvisibles false" when seeFriendlyInvisibles is already disabled is wrong
• MC-124720 – Cannot start server with GUI
• MC-124750 – /particle acting strangely across dimensions
• MC-124889 – You cannot shift click smeltable items into a furnace
• MC-124894 – Chests and dispenser don't spawn in structures on superflat worlds
• MC-124895 – Trees generate side by side
• MC-124898 – Minerals tab in furnace recipe book displays apple item
• MC-124949 – Tree generating in village house and as part of field
• MC-124956 – Furnace recipe book availability toggle has wrong tooltip ("Showing craftable")
• MC-125060 – Furnace recipe book availability toggle has crafting table icon
• MC-125107 – Mineshafts don't generate support blocks when a block is above it
• MC-125115 – Command suggestions don't order numbers from least to greatest
• MC-125130 – Selector auto-completion tooltips mixed up
• MC-125174 – Ore pockets do not generate in superflat worlds
• MC-125232 – Phantoms attack players in peaceful mode
• MC-125258 – Preparing spawn area spams 0%
• MC-125283 – Jungle Biomes are extremely cluttered
• MC-125381 – Effects from the turtle master potion don't show amplifier
• MC-125442 – Extreme Lag in Jungle Biome
• MC-125466 – Fishing drops don't come towards player
• MC-125550 – Experience orbs don't float up in water
• MC-125607 – Going inside of bubble columns in spectator mode plays bubble column sound
• MC-125803 – NoGravity no longers works on items
• MC-125872 – Superflat preset "the void" doesn't generate starting platform anymore
• MC-125915 – Zombies can destroy turtle eggs through a full block and a half above the egg
• MC-125946 – Phantoms can spawn inside/colliding with blocks
• MC-125997 – Deep Frozen Ocean isn't frozen
• MC-126086 – Salmon and tropical fish hitbox on land is wrongly positioned
• MC-126139 – The fins of dying cod and some tropical fish show z-fighting
• MC-126178 – Can use the water (with fish) bucket to destroy kelp, sea grass, coral and coral fan
• MC-126190 – Salmon mobs often get stuck
• MC-126198 – Only players are poisoned by pufferfish
• MC-126218 – Held turtle eggs are too low in first person
• MC-126261 – Turtle Egg Placement
• MC-126362 – Shift-clicking fuel into non-empty furnaces only moves fuel client-side
• MC-126380 – Getting an uncarved pumpkin gives recipe for jack o' lantern
• MC-126656 – Bubble columns made by Soul Sand only appear every other block
• MC-126734 – A tree inside which a village house generated generated without its trunk, possibly missing some leaves
• MC-126762 – Red screen when player attack invalid tropical fish variant
• MC-126800 – The tropical fish item is named "clownfish".
• MC-126815 – Banner and treasure markers on maps show incorrect icons in multiplayer
• MC-126859 – Polar bears and rabbits not spawning in Ice Plains
• MC-126950 – Riding floating boats underwater
• MC-127069 – huge phantom crash
• MC-127166 – Parrots don't imitate dolphins, phantoms and drowned
• MC-127253 – F3 + Q list isn't sorted alphabetically anymore
• MC-127291 – Zombies drowning always drop armor items instead of using random chance
• MC-127295 – Zombies can gain tridents or fishing rods when they drown
• MC-127337 – F3 + C (copy coordinates) does not copy dimension
• MC-127388 – Pufferfish appear with their most inflated model after world load
• MC-127516 – Duplication and deletion of ingredients, inventory desync and game freezing caused by faulty handling of firework star recipe
• MC-127593 – Waterlogged blocks such as fence sign ladder etc, will not allow bubble columns to spawn next to them
• MC-127924 – Slow falling is considered a negative effect
• MC-127969 – Sea grass doesn't generate correctly above stairs
• MC-127998 – You cannot place sea pickles on top of non solid blocks
• MC-127999 – Glitching in sea pickles when standing on them while placing the fourth one in the block
• MC-128039 – New Phantom skins do not match spawning egg colors
• MC-128242 – Leaving water while swimming causes player's arm to render out of screen
• MC-128264 – Mobs can spawn on regular ice
• MC-128285 – Dolphins summoned with NoAI take damage and die
• MC-128336 – Kelp spawns on trapdoors, stairs, slabs and chests on sunken ships
• MC-128463 – The "How Did We Get Here" advancement does not require Conduit Power
• MC-128557 – Drowning dolphins don't swim to the surface.

From the previous development version

• MC-128666 – Flowing water above magma blocks turns into bubble columns
• MC-128674 – Buffet End island puts you in the void
• MC-128712 – Phantoms don't drop experience when killed by player
• MC-128733 – The ice block tag is missing frosted_ice
• MC-128766 – Blue ice doesn't mine fast using pickaxe
• MC-128779 – "Debug Mode" comes before "Buffet" in the world creation menu
• MC-128857 – Sea pickles change hitbox when increasing count, but turtle eggs don't
• MC-129143 – The F3 menu shows the translated biome name, rather than ID.

Private issues

• MC-122684 – Connected LAN players are able to kick/ban the server host^[1]
• MC-127274 – F3 + C to copy coordinates works even when reduced debug info is enabled^[1]

• Unlike most of the first-of-the-week snapshots, this was released on a Tuesday instead of Wednesday.