Void Start Platform

The void start platform is a 33×33 square of stone with a single block of cobblestone in the center. It is created at the world spawn of a Superflat world on initial generation if  biome and   are set in the preset code.

Generation
The void start platform spawns from block positions (-8,-61,-8) to (24,-61,24), and thus the player spawns at Y=-60. This structure is most easily accessible through "The Void" preset but it still generates if different layers are specified, even if it gets engulfed.

Structure
Stone platform is a large platform made of stone and cobblestone.

Trivia

 * The player first spawns right above the platform, even if there are layers of full opaque blocks above it, causing suffocation.