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{{for|developmental versions of 0.0.12a|Java Edition Classic 0.0.12a/Development}}
{{Lost version|commonfake=1}}
{{Infobox version
|title=0.0.12a
|image=Classic 0.0.12a.jpg
|imagecaption=Screenshot by Notch
|edition=java
|prefix=Classic
|date=May 19, 2009
|clientdl=Client not archived
|serverdl=No corresponding server
|phase=Classic
|prevparent=0.0.11a
|next=0.0.12a_01
|nextparent=0.0.13a
}}<onlyinclude>

'''0.0.12a'''<ref>{{twon|110175116|0.0.12a is up|May 20, 2009}}</ref> is a version of [[Minecraft:Java Edition Classic]] released on May 19, 2009, at 22:36 UTC,<ref>{{link|url=https://archive.org/download/Minecraft_IRC_Logs_2009/history/files/May-15-to-June-03-2009/2009-05-19.155457-0400EDT.txt.~1~|title=TigIRC logs|date=May 19, 2009, UTC–4|website=Archive.org|quote=(18:36:09) notch: 0.0.12a is up. Water, lava, new map generation,rendering distance toggle}}</ref><ref group="note">While some sources imply that this version was released on May 20, due to timezones differences it was actually released at 22:36 UTC on May 19 (which is 00:36 on May 20, Sweden time).</ref> which adds [[Minecraft:bedrock]], [[Minecraft:water]] and [[Minecraft:lava]], along with a [[Minecraft:world boundary]] and a new world generator.

== Additions ==
=== Blocks ===
'''[[File:Bedrock JE1 BE1.png|32px]] [[Minecraft:Bedrock]]'''
* Unobtainable to the player.
* Bedrock and the layer above (if at the bottom of the world) is always dark even if exposed to the sky.
* Generates at the bottom of the world and in world boundary.
* Can't be broken, placed against, or otherwise selected.
* Also called “unbreakable stone”.

'''[[File:Lava JE1.png|32px]] [[Minecraft:Lava]]'''
* A type of liquid.
* Is transparent.
* Underneath lava, the mist is thin and orange in color.
* Spreads infinitely.
* Saplings decay if placed in lava
* Lava spreads by duplicating itself to open horizontal and downward squares.
* Lava is slower than [[Minecraft:water]] and can be easily outrun.
* Model has z-fighting with blocks below lava.

'''[[File:Water JE1.png|32px]] [[Minecraft:Water]]'''
* A type of liquid.
* Is transparent.
* Spreads infinitely.
* Doesn't work outside the map (it doesn't spread from world border after terrain generation).<ref>{{link|url=https://forums.tigsource.com/index.php?topic=6273.msg203496#msg203496|title=Minecraft (alpha)|website=TIGSource Forums|author=Syrion|date=May 22, 2009|quote=water just outside of the map doesn't actually "work". It doesn't fill up any pits next to it.}}</ref>
* Saplings decay if placed in water.
* Water spreads by duplicating itself to open horizontal and downward squares.

=== Gameplay ===
'''[[Minecraft:Controls]]'''
* Pressing {{key|F}} cycles between four levels of render distance which was known as "Fog setting".<ref name="TigSource">{{cite|url=https://forums.tigsource.com/index.php?topic=6273.msg201928#msg201927|title=Minecraft (alpha)|website=TigSource|date=May 19, 2009|quote=F to change draw distance. There are four settings. The fourth setting makes the game run at 50 fps on my Eee, but it's a bit.. claustrophobic. N to generate a new level. No more restarting the applet!}}</ref>
* Pressing {{key|N}} generates a new level, with a new level generation screen.<ref name="TigSource"/>

'''[[Minecraft:Swimming]]'''
* Only applies to players.
* [[Minecraft:Mob (entity)|Mobs]] move at full speed in the water.

== Changes ==
=== Blocks ===
'''[[Minecraft:Stone]]'''
* Water next to lava produces stone.

=== Mobs ===
'''[[Minecraft:Mob (entity)|Mobs]]'''
* No longer get reset on level reset, meaning there is no way to get rid of mobs now.<ref>{{link|url=https://archive.org/download/Minecraft_IRC_Logs_2009/history/files/May-15-to-June-03-2009/2009-05-19.155457-0400EDT.txt.~1~|title=TigIRC logs|date=May 19, 2009, UTC–4|website=Archive.org|quote=(18:39:43) <notch> oh, they don't get reset on level resets either.. I'd better fix that.}}</ref>

=== Non-mob entities ===
'''[[Minecraft:Player]]'''
* Player jump height increased by about 0.5 blocks.<ref>{{ytl|jwgXo3LYKaU|Minecraft Water test|Nizzotch Archive}}</ref>

=== World generation ===
'''General'''
* An infinite ocean now surrounds the map, making it impossible to fall off the world.
* The player can no longer pass the edge of the map.
* Terrain is messier with more bumps visible on the surface. It also now generates in islands.
** The terrain always generates one block above ocean level.
** Lakes occur when the surrounding water is at a higher level than the terrain.
** All [[Minecraft:dirt]] with access to sunlight doesn't become grass blocks upon world generation if below water level.
* [[Minecraft:Lava lake]]s also spawn occasionally.
* Worlds made before this version receive a bedrock layer at the bottom of the map and an [[Minecraft:ocean]] surrounding it.</onlyinclude>

== Bugs ==
'''1 bug reported'''
* The block being used to build does not show up unless it is a sapling.<ref>{{citation|url=https://forums.tigsource.com/index.php?topic=6273.msg201928#msg201928|title=Minecraft (alpha)|author=Navineous|website=Tigsource Forums |date=May 19, 2009|quote=I just found a glitch in the new version. In the top right corner my brick indication box is gone, it only shows up when I hit six and then it only shows I have a tree. But if I hit 1 2 3 or 4 it disappears. HELP! I'll post a screenshot soon.}}</ref>

== Gallery ==
<gallery>
0.0.12a-dev2.png|Early version of water during the development of this version.
Classic 0.0.12a-dev.png|Developer version of 0.0.12a, where [[Minecraft:multiplayer]] began work on the implementation. The version number is still 0.0.11a.
</gallery>
==Videos==
{{yt|jwgXo3LYKaU}}

== Trivia ==
* The video released by Notch on May 18th showing off 0.0.12a is actually a developer variant that was never released to the public. See [[Minecraft:/Development|Development]] for more information on this.
* To make the water and lava texture display slightly shorter than a block, its texture from <samp>[[Minecraft:terrain.png]]</samp> gets shifted down a bit in-game. This causes the texture to overlap with the block below at some angles.
* The 0.0.13a-launcher jar contains the level generation files for this same version, which is also the same terrain generation files used in the full, public release of it (and 0.0.12a_01-03). It has variables that can enable and disable the uniform dirt layer, and it has been disabled for the public variant of 0.0.12a (or at least 0.0.12a_03 for certain). It also has variables for the water filling up the world from the corners, which can be disabled.

== Notes ==
{{Notelist}}

== References ==
{{reflist}}

== Navigation ==
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