Java Edition Classic 0.0.12a

0.0.12a was a version of Classic released on May 19, 2009, at 22:36 UTC. It added bedrock, water and lava, along with a world border and a new world generator.

Blocks

 * Bedrock JE1 BE1.png Bedrock
 * Unobtainable to the player.
 * Initially referred as "unbreakable stone".
 * Bedrock and the layer above (if at the bottom of the world) is always dark even if exposed to the sky.
 * Cannot be broken, placed against or otherwise selected.


 * Water (pre-release).png Water
 * A type of liquid.
 * Does not drown the player.
 * Originally opaque.
 * Water does not work outside the map (it won't spread from worldborder after terrain generation).


 * Lava Revision 1.png Lava
 * A type of liquid.
 * Does not deal damage to the player.

World generation

 * World border
 * An infinite ocean now surrounds the map.
 * The player can no longer pass the edge of the map.

Gameplay

 * Controls
 * Pressing cycles between four levels of render distance.
 * Pressing generates a new level.


 * Swimming
 * Only applies to players. Humans move at full speed in water.

Mobs

 * Steve_Revision_1.png Humans
 * No longer get reset on level reset, meaning there is no way to get rid of mobs now.
 * Physics
 * Water and lava now flow to fill any available space below or next to it.
 * With just one water source the entire world will be flooded.
 * Water next to lava produces stone.

World generation

 * New level generator
 * Terrain is more messy with more bumps visible on the surface.
 * Lakes occur when the surrounding water is at a higher level than the terrain.
 * All dirt with access to sunlight will not become grass upon world generation if below water level.
 * Lava lakes also spawn occasionally.
 * Worlds made before this version will receive a bedrock layer at the bottom of the map and an ocean surrounding it.
 * (The following only affects the developer build of this version which Notch showcased on his YouTube channel. The public variant of 0.0.12a did not have this dirt layer generation)
 * Surface dirt layer is more uniform.
 * There is almost always a layer of grass with dirt under it above stone.
 * Cliff faces can no longer be made of pure dirt and grass.