Minecraft:Java Edition 12w40a

12w40a is the tenth Minecraft:snapshot for Minecraft:Java Edition 1.4.2, released on October 4, 2012.<ref>https://web.archive.org/web/20121006083812/http://www.mojang.com/2012/10/minecraft-snapshot-12w40a/</ref>

Additions

World generation

Minecraft:Swamp huts

• New generated structure.
• Located in swamp biomes.
• Spawn witches.

General

NBT format

• Custom items can now be named using NBT data (intended for custom map makers).
  • Using the NBT, it is possible to add custom Template:Nbt to Minecraft:items, as well as a Template:Nbt list for that item.

Minecraft:Superflat

• Added preset "Redstone Ready" with 52 layers of Minecraft:sandstone, 3 layers of Minecraft:stone and 1 layer of Minecraft:bedrock.

Changes

Blocks

Minecraft:Beacons

• Texture has been altered.
• Beam texture has also been changed.

Minecraft:Fire

• Spreading has been nerfed to prevent infinitely spreading fires.

Items

Minecraft:Eye of ender

• Can now be used in superflat worlds, if the stronghold generation is enabled.

Mobs

Minecraft:Slimes

• Now spawn in Minecraft:swamp biomes at low light level.

Gameplay

Minecraft:Inventory

• Better management.
• The pick block action now works on Minecraft:blocks that are represented as Minecraft:items in the inventory (e.g.: Minecraft:redstone repeater, Minecraft:redstone dust, and Minecraft:tripwire).
• Pressing the 1-9 hotkeys while hovering over an item puts that item into the corresponding hotbar slot.
  • If there is already an item in the assigned hotbar slot, the hotbar item and the selected item swap position.
  • When in Minecraft:Creative inventory, a full stack of that item is transferred to that hotbar slot.
• In Creative mode, players can now shift-click items between the hotbar and the Survival inventory.
• The left-click action no longer opens Minecraft:doors, pulls Minecraft:levers, pushes Minecraft:buttons or opens Minecraft:trapdoors.
• When in Creative mode, Template:Control on an item picks up a stack of that item.

General

Minecraft:Superflat

• Configuration now allows the player to generate Minecraft:trees, Minecraft:strongholds etc.
• Now Minecraft:pumpkins, Minecraft:short grass, Minecraft:ferns, Minecraft:flowers, trees, Minecraft:mineshafts, Minecraft:dungeons, strongholds, Minecraft:lakes, Minecraft:desert wells, Minecraft:ravines and Minecraft:ores spawn on superflat maps.

Fixes

13 bugs fixed

• Fixed the wither's starting explosion not being disabled by the mobGriefing gamerule<ref>Template:Tweet</ref>
• Fixed a few crash bugs related to world generation, map item expansion, and other things.
• Reverted lighting changes that had been introduced in snapshot 12w39a. This change corrected such bugs as:
  • The Nether being extremely CPU intensive.
  • Map generation taking extremely long.
• Fixed mob AI considering cobblestone walls as blocks of normal height.
• Fixed a few texture oddities with the witch.
• Fixed entities in water producing glitchy water sound.
• Gaining multiple levels at a time no longer plays the leveling up sound over itself as many times as leveled.
• Fixed the "A 64 bit Java installation is recommended for 'Far' render distance (you have 32 bit)" message being covered by the bottom 2 buttons.
• Fixed pets teleporting around randomly.<ref>Template:Tweet</ref>
• Fixed being unable to place paintings larger than 1x2 and them popping off if they have been placed before.
• Fixed destroying blocks under the player with efficiency-enchanted gear.
• Fixed potion spawners crashing the game.<ref>Template:Tweet</ref>