Minecraft:Java Edition Classic 0.0.13a/Development

Several unreleased development versions of the game labelled 0.0.13a were developed on May 21st. They show in-development features later included in Minecraft:0.0.13a and later releases. The huge world size features showcased in these versions would not be publicly available until Minecraft:0.0.14a.

World size test (1) (May 21, 2009)

• Additions
  • Added a thin black block selection outline.
  • Pressing Esc now opens the pause menu (but doesn't close it yet), with options to return to game, generate a new level, and (not yet functional) save/load level. Unlike in the final release of 0.0.13a, the "Game menu" text at the top is missing, and the background gradient is slightly different.
• Changes
  • Changed the game's resolution from 640×480 to 854×480.
  • The block being used is once again shown in the top right corner.
  • Made swimming and sinking faster than before.
  • Holding the Template:Ctrl key no longer allows for autojumping.
  • Jump height reduced back to just over 1 block instead of just over 1.5 blocks.
  • This is the earliest known version where holding down R no longer causes the player to cycle between different locations - holding the key now has the same effect as simply pressing it.
  • Lava is no longer transparent and has a thick, red mist when underneath it.
  • Changed the texture of saplings from File:Oak Sapling JE1.png to File:Oak Sapling JE2.png
  • The generated world is now completely flat. When generating a new level from the pause menu, the world is of a long shape (32×64×512), but still flat. However, caves and underground lava can still generate in these worlds.
• Trivia
  • This is the only 0.0.13a developer build that is available in the launcher, added to it among several other versions on August 6, 2013.

Gallery

• A screenshot of world size test 1.
  A screenshot of world size test 1.
• A long flat strip of grass block.
  A long flat strip of grass block.
• Screenshot of this version from Minecraft:Dinnerbone.
  Screenshot of this version from Minecraft:Dinnerbone.
• Lava in a cave.
  Lava in a cave.

World size test (2) (May 21, 2009)

• Changes
  • The world is now 1024×64×64 instead of 512×64×32 in size, and generates actual terrain.<ref>IRC logs: "(10:48:56) Notch_: and I just tried making a 1024x64x64 map. It's nuts [...] (10:49:06) Notch_: it's basically a looong gauntlet of hills and lakes"</ref>
  • Terrain has been updated to the 0.0.13a_03 format.
  • Dirt layer is now more uniform.
    • There is always a single block of dirt after grass and before stone.
  • If water generates next to lava on world generation, it now produces stone.
• Trivia
  • It is very likely this version has the new level generation screen, however this is not confirmed.

Huge levels (May 21, 2009)

Template:Unreleased version YouTube video (reupload)

• Changes
  • The world size is now 512×64×512.
  • Surface lava lakes are still possible, as seen in the video.
  • The world generation screen has been changed.
    • The dirt background is now darker.
    • Added a progress bar below the progress text.

References

• Template:AnchorIRC logs, #minecraft.20090521.log (May 21, 2009, UTC+2).