Java Edition 16w20a

16w20a is the first snapshot released for 1.10.

Blocks

 * Structure block
 * Now available for map makers.
 * New texture.


 * Structure Void
 * Used for the structure block to not replace existing blocks in that location.


 * Magma Block
 * Found in the nether.


 * Nether Wart Block
 * Crafted by filling a 3x3 crafting table with Nether Wart.


 * Red Nether Brick
 * Red Nether Brick is crafted by using a 2x2 space in a crafting table using Nether Brick (item) and Nether Wart (2 nether brick (item) and 2 nether wart), each of them placed in diagonal lines.


 * Bone Block
 * Crafted by filling a 3x3 crafting table with Bone Meal.
 * Placing it in a crafting table crafts 9 bone meal

General

 * Options
 * A new button called 'Auto-jump'
 * Is on by default
 * Ported from Minecraft Pocket Edition.

Mobs

 * Polar bear
 * Grown ups and children spawn randomly in cold biomes
 * When hit, the grown ups will attack you, the children run away
 * Drop different types of fish


 * Stray
 * Acts mostly like a normal skeleton
 * Drops the same as skeletons plus an arrow of slowness
 * Is a skeleton with SkeletonType set to 2
 * Spawns in cold biome types (e.g. Ice Plains Spikes)
 * Shoots Arrows of Slowness (0:30) at the target


 * Husk
 * Behaves like a zombie
 * Is not burning under sunlight
 * Is a Zombie with ZombieType set to 5
 * Spawns in warm biome types (e.g. Desert)
 * Applies hunger debuff when attacking


 * NBT tags
 * ZombieType
 * 0: default, 1-5: villager, 6: husk
 * Replaces IsVillager and VillagerProfession, they still function, but are no longer saved in the entity.
 * NoGravity
 * Now exists for all entities, not only armor stands.


 * Spawn Eggs
 * Now exists for:
 * Wither Skeleton
 * Mule
 * Skeleton Horse
 * Zombie Horse
 * Donkey
 * Cat
 * Elder Guardian
 * Polar bear
 * Stray
 * Husk
 * It is worth pointing out that all of these spawn eggs have unique colours, unlike Donkey and Mule spawn eggs in Console Edition.

World generation

 * Fossils
 * Generates underground.
 * The .nbt files can be found in the structures folder within the 16w20a jar. Please add where they generate here. (which biome, which dimension etc.)
 * There are 4 variants of the skull and of the spine structure sections.
 * There is a coal and boneblock variant of each of them.

Changes

 * Some relatively broken uses of relative coordinates are fixes and should work relatively well now
 * Use of absolute coordinates is absolutely identical to how it worked in older versions of Minecraft
 * Endermen can now spawn in the nether
 * Changed abandoned mineshafts in mesa biomes, there seems to be something shiny inside

World generation

 * Villages
 * Now spawn in more biomes and with biome-specific wood (e.g. in Taiga with Spruce wood)
 * Now spawn with grass paths rather than gravel path
 * More wonderfull world generation.
 * Added collapsing sand in the desert with falling particles.