Obsidian Wall

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 "title": "Obsidian Wall",
 "rows": [
 {
 "field": "Anywhere, as biomes were not present in the game at this time.",
 "label": "(link to Biome article, displayed as Biomes)"
 },
 {
 "field": "No",
 "label": "Generates in<br>existing chunks  "
 },
 {
 "field": "<span class=\"nowrap\"><span class=\"sprite-file\" style=\"\">(link to File:BlockSprite obsidian.png article, displayed as 16x16px|link=Obsidian|alt=|class=pixel-image|)</span>(link to Obsidian article, displayed as <span class=\"sprite-text\">Obsidian</span>)</span>",
 "label": "Consists of"
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 "invimages": [],
 "images": [
 "Obsidian Wall.png"
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}

Obsidian walls were an experimental and short-lived debugging structure made of obsidian. They were introduced in a version of Infdev released on February 27, 2010, and were removed two weeks later on March 13.

Obsidian walls would replace all solid blocks which had an X or Z coordinate of 0, and extend two blocks above the terrain. This formed a set of two walls for the two cardinal directions, which intersected at the center of the world. The obsidian walls would generate in every world.

In Infdev 20100227-1414, the player would spawn at the point which the two walls intersect, (0,0). The wall was always made of 2 block high obsidian which was placed on top of the existing terrain. From there, it would generate obsidian going all the way down to the bottom of the world replacing any stone, dirt, or grass blocks below it.

• 👁 An obsidian wall seen scaling up a large cliff
  
  An obsidian wall seen scaling up a large cliff
• 👁 A wall going up a hill
  
  A wall going up a hill
• 👁 An obsidian wall that has generated underwater
  
  An obsidian wall that has generated underwater
• 👁 A regular obsidian wall, at the center of spawn
  
  A regular obsidian wall, at the center of spawn

• The player could use the obsidian walls to discover a brick pyramid, which was another generated structure in this version, introduced for testing structure generation and experimenting with the terrain generator's ability to handle large structures. Once the player spawns into a new world, turning left 45 degrees from the spawn point and walking straight in that direction, and reaching the end of the skybox, the player would find a brick pyramid.