Only Structures

Disables normal world generation.

Spawns only structures with the exception of ancient cities and desert temples.

Structure spawn chance is heavily increased.

Icebergs spawn in frozen ocean and mineshafts spawn below them.

Spawns a layer of lava at the bottom of the world, but without bedrock under it, and occasionally spawns lava lakes near the bottom.

Works in the nether and end.

The end generates with only the obsidian pillars and bedrock portal.