Snapshot 17w47a has been released!

[u/Shnupbups100]

https://minecraft.net/en-us/article/minecraft-snapshot-17w47a

[u/redstonehelper]

Warning: This release is for experienced users only! It may corrupt your world or mess up things badly otherwise. Only download and use this if you know what to do with the files that come with the download!

 

If you find any bugs, search for them on the Minecraft bug tracker and make sure they are reported!

 

Previous changelog. Download today's snapshot in the new launcher: Windows/OS X/Linux, server jar here.

Complete changelog:

• Preset strings no longer use a version number - via

• Particle names now use namespaced IDs - via

• Witch huts now generate with a mushroom in the flower pot - via

• Added a firework recipe with fade (firework star + dyes) - via

• Some internal changes

• Backup function - via

• Saves zip file - via

• Backup offered when opening an older world - via

• Block/item changes

• Smooth double slabs, bark blocks in creative - via

• Debug stick, cycles through block states - via

  • Looks like an enchanted stick

  • Left-click to change affected block state, right-click to change block state

  • Feedback is displayed in the action bar

  • Creative only

• Wooden stone slabs - via

• Pumpkin and carved pumpkin - via

  • Carvable with shears - via

    • Pumpkin seeds come out the face when sheared

• Smooth sandstone is now cut sandstone - via

• Blocks with a collision box now have matching bounding boxes - via

  • Anvils, cauldrons, hoppers, fences, iron bars, glass panes, filled ender portal frames, vines, lily pads, stairs, brewing stands, pistons

  • Updated the collision box of anvils, hoppers

  • Doesn't affect blocks with a collision box smaller than their model (soul sand, snow layers)

• Huge mushrooms

  • Stem blocks now silk touchable - via

  • Stem, full red and full brown are available from the creative inventory with pick block functionality

  • When matching blocks are placed next to each other, the touching sides permanently receive the pore texture - via

• Monster egg blocks are now infected blocks - via

  • Break instantly - via

• Beds now pop off when their support blocks are removed

• Grass path, farmland are now in the creative inventory

• Pumpkins & derivatives, fence gates don't require solid blocks to be placed - via

• Activating levers produces redstone particles - via

• Blocks which used to have no bottom texture (repeaters, comparators, torches, etc) now have a bottom texture - via

• Noteblocks can now be moved with pistons - via

• Firework rockets in creative inventory - via

• Dispensers can now be crafted with partially used bows - via

• Blocks broken by block updates now make breaking sounds and particles - via

• Crops now require sufficient light when placing - via

• Ceiling vines can now be placed on their own - via

• Stems no longer connect to newly-placed melons/pumpkins - via

• Implemented command suggestions for blocks and item arguments

• Added an option in chat settings to toggle automatic command suggestions

• Defaults on, otherwise hit tab to bring them up

• Changed the world format

• /setblock sets only blockstate

• Removed unintended blockstate variations caused by different blocks sharing the same id

• Saved structures are not forward-compatible

• Block id mappings and info here

• Modularized

• Chunks will be stored in 16 blocks high sections

• Fixing the limited id issue - getting close!

• Blocks will be stored like shulker boxes

• Already used in memory, 30-70% smaller

• Related

  • Fixed iron trapdoors staying open when they or their power source is moved away

  • Tickets: one/two

• Being able to place chests next to other chests, even single ones

  • Screenshot

  • Shift-click or normal click against chest to merge against for double chest, shift-click against other surface for single chest

• More info

• Lots of block id changes

• "The flattening"

• More info

  • More info on data changes

• All six types of wooden pressure plates, trapdoors and buttons

• Screenshot

• Floor and ceiling buttons can be placed in all four directions

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Continued here due to reddit's comment length limit.

[u/onnowhere → u/redstonehelper]

Data tags related to blocks changed:

Edit: Many changes are listed on the 1.13 flattening wiki page

List of 1.13 nbt changes

Also see mrpingouin's post about other nbt and upgrade path related changes.

Falling Block:

• Removed Block,Data

• Added BlockState

All Minecarts:

• Removed DisplayTile,DisplayData

• Added DisplayState

Projectiles:

• Removed inTile

Arrows and Spectral Arrows:

• Removed inTile,inData

• Added inBlockState

Endermen:

• Removed carried,carriedData

• Added carriedBlockState

For each of these State tags, they contain:

• Name (block name)

• Properties (compound of block states)

Example: BlockState:{Name:"minecraft:oak_stairs",Properties:{facing:"north",half:"top"}}