Biome



According to Wikipedia, Biomes are climatically and geographically defined as similar climatic conditions on the Earth, such as communities of plants, animals, and soil organisms, and are often referred to as ecosystems.

In Minecraft, from the Halloween Update onwards, this means different areas, with different heights, temperatures, humidity, and foliage colors.

Before the Halloween update, when a map was generated it got a 'theme', i.e. Snowy or Grassy. After this update, a single world will include all themes in a logical fashion.

Demonstration video

Pre-Update Saves
Worlds generated before the update will not be changed. However, any new chunks generated (by the player moving outside of the current world's bounds) will generate biomes, just as The Nether will be generated when you first enter it.

Biome Types
There are 11 Biome types: (Note: these names come from Notch's notes)

Rain Forest
A biome with many trees and lakes. Some trees may also have leaves extending to the ground, covering the entire trunk.

Swamp
A biome with many small pools. Reeds are commonly found.

Forest
A biome with many trees.

Woods
A biome with many trees.

Taiga
Snowy terrain with a few trees.

Desert
A biome consisting mostly of sand and Cacti.

Grassy Desert
Just like desert, only with grass in the place of sand.

Tundra
Snowy, barren terrain with no trees.

The Nether
This is not an official biome, as it is not found in the normal world, but it does have unique geographical features, making it similar to a biome.

Remaining Work
Remaining work on biomes include variable elevations in certain biomes (flat elevation in desert biomes, etc.) in addition to improving the border between arctic and tropical biomes.

Snow currently does not "fall" Meaning that once snow or ice has melted or been mined, it will not come back.