Pretty obvious I guess.
A brick 512 studs long, 512 studs wide and the height of a x8 cube, and another brick with those dimensions except with a height of 1 plate. This probably sounds really useless and stupid, but I need it to elevate the level of slate apart from a small area in a center building which needs to hold a basement; while keeping the endless flatness of slate without spending thousands of bricks to 8x8 cubes (4096 cubes would be needed).
From what I've heard .dts files are really easy to make, I would just have no idea how to start at all.
Thanks in advance.