Java Edition 16w20a

16w20a is the first snapshot released for 1.10.

Blocks

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


 * Structure Void
 * Used for the structure block to 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
 * Crafted by placing a 2x2 checkerboard of 2 Nether Brick (item) and 2 Nether Wart in a crafting table.


 * 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
 * Does not burn in 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 in Deserts, Swamplands (still searching)
 * The .nbt files can be found in the structures folder within the 16w20a jar and can only be loaded using the structure block when you put the files into the world folder.
 * The easiest way is to save a new structure using a special name, and search on your machine for that name. Put the structures in the same folder to load them. (Worth noting, on Macosx, this folder may be in the wrong location since the structures are saved under .minecraft/User/.../worldname/structures/...
 * There are 4 variants of the skull and of the spine structure sections.
 * There is a coal and boneblock variant of each of them.
 * The dimensions are as follows (length×width×height):
 * The skull: 7×5×5
 * Another skull: 4×4×4
 * The spine: 13×7×4
 * Another spine: 14×3×3

Mobs

 * Endermen
 * Can now spawn in the Nether

World generation

 * Abandoned mineshafts
 * Can now occur above-ground in mesa biomes
 * Gold will generate in these mineshafts


 * 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.

Fixes

 * More fixes:
 * Fixed some broken uses of relative coordinates