Java Edition 13w18a

13w18a is the fourth snapshot for Java Edition 1.6.1, released on May 2, 2013.^[1]

Block of coal

• Crafted with coal in a 3×3 space.
  • The block cannot be crafted with charcoal.
• Can be used as furnace fuel and smelts 72 items, the equivalent to 9 coal.
• Can be used as a storage block for large amounts of coal, similarly to blocks of iron and related blocks.

Leads

• New crafting recipe: 4 string and 1 slimeball.

Nether fortresses

• Added chest generation.
  • Chests generate in corners of interior corridors.

Texture pack system

• Start of a new texture loading system.
• New "missing texture" texture.

Carpets

• Can now be placed on translucent blocks.
  • This includes glowstone, glass, glass panes, and beacons.
  • Beacons still function under carpets.

Hay blocks

• New crafting recipe.
• Hay blocks are crafted with wheat similarly to mineral blocks.
• Hay blocks cannot be crafted back into wheat.

Locked chests

• Texture changed to missing texture, due to the new texture pack loading system.

Redstone comparators

• Now output a signal for cauldrons and end portal frames.
  • A cauldron gives signal strengths that range from zero (empty) to three (full) depending on the amount of water contained inside.
  • An end portal frame would give a signal strength of either zero or fifteen, depending on if an eye of ender has been inserted into it.

Cocoa beans

• Removed from dungeon chests.

Horse armor

• No longer craftable.
• Can be found in dungeons.

Horse saddles

• Removed from the game.

Saddles

• Can now be found in most generated chests.

Horses

• Tweaked horse equipment obtainability.
• Normal saddles are now required to ride horses.
  • Horses now use the same saddle that pigs use.
• Adjustments related to horses makes them more practical later in the game.

Zombies

• Mechanic whereby zombies spawn more zombies adjusted to be subtle and not as easily visible to the player.
• Zombies spawn in dark areas far from the player or in caves.
• No longer attack when provoked by players in Creative mode.

Creepers, skeletons, witches and wolves

• No longer attack when provoked by players in Creative mode.

7 issues fixed

From released versions before 1.6.1

• MC-590 – Mobs not realizing they killed their attacker and trying to attack empty space.
• MC-1320 – [Wolves] wont stop snarling after punched by someone else.
• MC-1980 – Zombie villagers are able to despawn during curing process.
• MC-4631 – Lava decay fails to schedule block update.
• MC-14221 – Blocks stop updating one minute after entering the Nether or the End.

From the 1.6.1 development versions

• MC-14586 – The player can pick up command blocks with any pickaxe.

From the previous development version

• MC-14786 – Can't place carpet on translucent blocks.

• This snapshot, being the fourth for 1.6.1, was released in the same week of the year as the fourth snapshot for 1.3.1, 12w18a.
• As with 13w18b and 13w18c, this snapshot was released on the same day as 1.5.2.