World Customization Preview (Minecraft 1.8)
Here's a quick preview of an upcoming feature for Minecraft 1.8 which will allow players to create their own wild and crazy terrain!
There are 16 sliders which can be used to affect various aspects of Minecraft's terrain generator, but you can also type in values directly. You also have complete control over things like the sea level and what structures you want to generate.
We've also supplied a set of seven presets that we think players will find interesting, including a world made of water up to the top of the map, and the return of floating islands.