Java Edition 18w15a

18w15a is the thirty-first snapshot released for Java Edition 1.13, which adds most of the features from Bedrock Edition beta 1.2.14.2: dolphins, blue ice, conduits, and icebergs.

Blocks

 * Blue ice
 * Generates in icebergs.
 * More slippery than ice or packed ice.
 * Crafted using 9 packed ice.
 * Conduit
 * Crafted using 1 heart of the sea and 8 nautilus shells.
 * Can be activated by placing prismarine, prismarine bricks and/or sea lanterns in 5x5 open squares around it.
 * When active, will affect nearby players in water or rain with the Conduit Power status effect.
 * A complete structure will fully power the conduit.
 * Emits a strong glow, at light level 15.

Items

 * Heart of the sea
 * Used to craft conduits.
 * Not available currently in survival.
 * Nautilus shell
 * Used to craft conduits.
 * Can be obtained by fishing.
 * Drowned can spawn holding a nautilus shell.

Mobs

 * Dolphins
 * Spawn in all oceans except frozen.
 * Are neutral. Like wolves and zombie pigmen, dolphins will attack in groups if one is angered.
 * Can be fed using raw cod, but they do not breed.
 * Sometimes drop cod on death.
 * Play with nearby items by picking them up and dropping them after a short moment.
 * Occasionally jump out of water.
 * Can also jump between disconnected bodies of water.
 * Chase after boats and jump over water surfaces.
 * Suffocate after spending too much time on land.

World generation

 * Icebergs
 * Generate in frozen oceans.

Effects

 * Conduit Power
 * Given when a conduit is activated.
 * Stops the breath meter from running out, gives underwater night vision and increases mining speed.
 * When active at full power, the range will increase and hostile mobs within 8 blocks will take damage.

General

 * Options
 * Added "Biome Blend" distance video option.

Fluids

 * Water
 * Has a new texture.
 * Now only blocks 1 light per block, instead of 3.
 * This only affects newly placed water.
 * Underwater vision from previous snapshots is gone; water is darker at lower depths.
 * Ocean variants have their own water colors, and the swamp water color has been changed.
 * In newly generated chunks, it is less likely to find frozen oceans next to warm oceans, etc. It is, however still possible to find warm oceans next to snowy tundra, etc.

Mobs

 * Spawning
 * Mobs can now spawn on top of ice.

Gameplay

 * Swimming
 * It is now possible to swim through one block holes again.
 * The transition between swimming and normal state is now smoother.
 * Sprinting at the surface of water no longer makes the player swim; instead they stay at the same altitude constantly.

General

 * Optimizations
 * Optimized fog rendering.


 * Splashes
 * Added "Thanks for the fish!"

Video
Video made by slicedlime: