very neat, it would be interesting to see the 3x3 grid encoding used for steganography, especially in a game. Incidentally, this is another reason that Minecraf

very neat, it would be interesting to see the 3x3 grid encoding used for steganography, especially in a game. Incidentally, this is another reason that Minecraft needs a vertical slab, an open trapdoor is one option but has a limited palette.