Why Do the Farlands Generate?

So, why does the Far Lands generate at the random, seemingly arbitrary number of 12 million? It has to do with how precise that noise map itself is. For the noise map math, rather than each pixel or unit representing one Minecraft block, every 171.103 units represent one block. The reason for this is unknown.

Why were the Far Lands removed?

However, after extreme distances the code that defines the terrain generation fails, creating the broken landscape of the Far Lands at about 12,500km. ... Minecraft 1.8: Unfortunately, the Far Lands were removed from the game when the new terrain generation code was released in an update on September 12th, 2011.

What causes the Minecraft Far Lands?

We all know about the Far Lands, a bug in caused by floating point precision errors in infinite world generation. They generate as a wall of stones, dirt, and grass that leads from bedrock all the way up to the world height limit.