Minecraft wiki entry for Superflat, associated text: In Java Edition, the structure, and content of a Superflat world can be customized. Bedrock Edition has no interface for customizing flat worlds; it always uses the default configuration (one layer of bedrock, two layers of dirt, and a layer of grass blocks) even when the Seed Picker is used. However, custom flat worlds are supported internally, and can be used by modifying FlatWorldLayers in the world's level.dat file using an external editor. Players on Xbox One, PlayStation 4 and Nintendo Switch can also use the Legacy Console Edition to customize a superflat world, then transfer it to Bedrock.