Board Thread:General Discussion/@comment-5278964-20121202185442

Terrain is a feature that allows players to have a lot of blocks (about 16 millions) with almost no lag. It uses voxels and provides an huge grid of 4x4x4 blocks that can have different materials and shapes. While Terrain inherits from BasePart, most of the inherited properties and methods will have no effect on the Terrain object; instead use those methods and properties specific to the Terrain object. 