Java Edition 13w42a

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 "field": "<span class=\"plainlinks\">[https://en.wikipedia.org/wiki/Java_version_history#Java_SE_6 Java SE 6]</span>",
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 "footer": "<table style=\"margin: auto; word-break: break-word;\">\n<tr style=\"background: inherit;\">\n<td style=\"padding: 0.4em\" >[[Java Edition 1.6.4|<span style=\"margin-right:-0.35em\">◄</span>◄  1.6.4]]</td>\n<td style=\"padding: 0.4em\">'''[[Java Edition 1.7.2|1.7.2]]'''</td>\n<td style=\"padding: 0.4em\" >[[Java Edition 1.7.4| 1.7.4 <span style=\"margin-right:-0.35em\">►</span>►]]</td>\n</tr>\n<tr style=\"background: inherit;\">\n<td style=\"padding: 0.4em\">\n[[Java Edition 13w41b|◄  13w41b]]\n</td>\n<td style=\"padding: 0.4em\">''' 13w42a'''</td>\n<td style=\"padding: 0.4em\">\n[[Java Edition 13w42b| 13w42b ►]]\n</td>\n</tr>\n</table>"
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13w42a is the twelfth snapshot for Java Edition 1.7.2, released on October 17, 2013.^[1] It allows for more letters to be put on signs, change the texture of stained glass and makes witches a common monster (like creepers and zombies) instead of spawning exclusively in and around witch huts.

Signs

• Different letters can be typed now.

Stained glass

• Have a smoother/transparent texture.

Stained glass panes

• Have a smoother/transparent texture.
• The crafting recipes now yield 16 panes instead of 6, to be consistent with regular glass panes.

Water

• Transparency slightly adjusted.
• If water is directly adjacent to ice, when looking through the ice, the player cannot see the water.
  • However, the player can see the ice when looking through water.
  • If water is not directly adjacent to ice, the player can see the water when looking through the ice.^[2]
• The player can no longer see the water surface from underwater

Maps

• Now display the color of colored wool and stained clay, allowing a wider range of colors visible on maps.
• Each different type of block has a different shading on the map.

Witches

• Now spawn anywhere where the light level is 7 or less, including any biome and underground.

Zombies

• Can only break doors when having the new CanBreakDoors tag set to 1, an up to 10% chance.^[3]

Inventory

• The armor boxes get black when empty and away from cursor.
• Putting cursor over the armor inventory displays which armor is to put on there.

Resource packs

• Rewrote the sound system.
  • The player is now able to add new sounds using resource packs.
• Resource packs can now add, remove, supplement, randomize, and group sounds using JSON.
• Sounds and music are now stored together in the new .minecraft/assets/sounds folder.

15 issues fixed

From released versions before 1.7.2

• MC-4921 – Sounds (e.g. mobs/portals/water) don't immediately fade.
• MC-10633 – Players can't look through ice or stained glass if they have it in their hand, but they can if it is placed.
• MC-19483 – Sounds playing after leaving world.
• MC-26660 – Constant minecart sound.
• MC-28478 – Successful hit sound effect does not match the sound in the assets sound folder.

From the 1.7.2 development versions

• MC-31577 – Major bug: arrows shot by infinity bow/skeleton do not despawn over time.
• MC-32082 – Signs, heads, and cauldrons have a full block breaking texture.
• MC-32295 – Glitchy item borders with mipmapping and anisotropic filtering activated.
• MC-32314 – The Mojang logo is blurry.
• MC-33141 – Rain does not stop.
• MC-33182 – Losing connection to server when a minecart command block is placed on a powered activator rail.
• MC-34096 – Minecart sound is considered an enemy monster.
• MC-34649 – Glass panes, stained glass, and ice show the texture in all faces.

From the previous development version

• MC-34889 – Superflat shows void particles.
• MC-34892 – Mobs/other players only looking in one direction/walking backwards on SMP.

• 13w42b and the April Fools' version 3D Shareware v1.34 both have the same protocol version as 13w42a.
• 13w42a was previously removed from the launcher for some time, but was added back in September 2018.