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12w03a is the first snapshot for Java Edition 1.2.1, released on January 19, 2012,[1] which added jungle biomes and jungle trees.

Additions[]

Blocks[]

Jungle Leaves JE1 BE2 Jungle leaves
  • Generates in jungle trees.
Jungle Log Axis Y JE1 BE1 Jungle log
  • Slightly-mossy brown textured with horizontal bark.
  • Generates in jungle trees.

World generation[]

Biomes
  • Added jungle biome.
  • Thick canopy with jungle trees, vines, fern, and brightly-colored grass.

Changes[]

Blocks[]

Ladders
  • Regained collision box.
Vines
  • Are now climbable if the player was pushed into a solid block while next to them.

Items[]

Spawn eggs
  • Dispensers can spawn mobs when dispensing spawn eggs.
  • TU60 Feature: Spawn eggs are now stackable to 64.

Mobs[]

Wolves
Zombies
  • Have new path-finding AI.

General[]

Languages
  • Updated language files.

References[]

  1. "Minecraft Snapshot 12w03a" (archived) by Jens Bergensten – Mojang.com, January 19, 2012.
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