Custom

Customized is a world type replacing the normal varied terrain of the Overworld with customizable features. The world type was previewed by Ryan Holtz via a video posted to the TeamMojang YouTube channel, which is based on a Minecraft mod called Wedge he made in 2012. It is expected to appear in the next 1.8 snapshot.

Customization
There are 16 customization options which can be used to affect various aspects of Minecraft's terrain generator. These can be changed by moving sliders or by typing in values directly.

There are 14 customization options which affect whether generated structures will spawn in, as well as other environmental factors. Some of these presets are Yes/No inputs or sliders.

Presets
There are seven presets Water World, Isle Land, Caver's Delight, Mountain Madness, Drought, Caves of Chaos, Good Luck