Minecraft:Java Edition 12w18a

12w18a is the fourth Minecraft:snapshot for Minecraft:Java Edition 1.3.1, released on May 3, 2012.<ref>Template:Cite</ref>

This is the first version that makes singleplayer worlds run on a local server, resulting in the use of separate threads for rendering logic and world logic. This change resulted in a large number of broken features, some of which are yet to be fixed in the latest version, and on weak computers can result in server-lag in singleplayer.

Additions

Blocks

Template:Animate Template:Animate Template:Animate Template:Animate Wood, Minecraft:Leaves, Minecraft:Planks, and Stone Bricks Variants

• Now have their proper names (e.g. "Oak Wood", "Birch Leaves", "Spruce Wood Planks", "Mossy Stone Bricks").

Changes

Items

File:Book and Quill JE1 BE1.png Book and Quills

• Game no longer pauses when writing in a book and quill.

File:Cocoa Beans JE1 BE1.png Minecraft:Cocoa Beans

• Now obtainable from jungle tree leaves.

File:Oak Sign JE1 BE1.png Minecraft:Signs

• Game no longer pauses when writing in a sign.

Wooden Minecraft:Tools

• Can now smelt one item in a furnace.

Mobs

File:Farmer.png Minecraft:Villagers

• When spawned from Minecraft:spawn eggs, they now get a random profession.

Gameplay

Minecraft:Breaking

• The 1⁄4 second (5 tick) delay between block breaking has been removed for players in Minecraft:Survival. The player can now instantly mine a large amount of blocks in Survival simply by holding Template:Control if conditions are met.

Minecraft:Hardcore

• Hardcore is now available in Minecraft:multiplayer.

Minecraft:Singleplayer

• Separated server logic and client, therefore singleplayer is now a local server.

Command format

General

• Game no longer pauses when entering a command or pausing the game.

General

Minecraft:Debug screen

• Coordinates are now rounded to 5 digits.
• "ws", "fs" and "g" (Walking speed, flying speed and ground; "g" is true if the Minecraft:player is touching the ground).

Minecraft:Language

• Updated language files.

Minecraft:Texture packs

• Support and auto-download for server texture packs.

Minecraft:Server jar

• The server jar now accepts command-line arguments --demo, --port, --singleplayer, --universe, and --world. The old nogui argument still works for backward compatibility.

Removals

General

Minecraft:Infinite Map Visualizer

• Removed the infinite map visualizer from the game's source code.

Features broken by the internal server Template:Main

• Many features were broken or significantly changed due to the client-server split, many of which still remain absent from the game.

Distance effects

• The particles from adding an Minecraft:eye of ender to an Minecraft:end portal frame block no longer appear offset if performed at high distances from the world origin.
  • This is due to the fact that they simply did not appear at all from this snapshot onward, which is Template:Bug.
  • This bug resurfaced in Minecraft:Java Edition 19w14a when the aforementioned absent particles bug was fixed.

Player

• The player "Notch" no longer drops an Minecraft:apple in addition to his inventory.
• When a user is opped, the server no longer displays the message "You are now op!".
• When a user is deopped, the server no longer displays the message "You are no longer op!".

Fixes

4 bugs fixed

• Fixed being unable to switch tools of the same kind in inventory.
• Fixed water destroying non-solid blocks when breaking them from above.
• Fixed picking a block in Creative with a tool in hand causing the tool to be lost.
• Fixed Silk Touch yielding only one slab from double slabs.

Trivia

• In this version, when loading a singleplayer world, one needs to put minecraft.zip/server/minecraft_server.jar into .minecraft/server manually to continue loading.