Square-2A modified Square-1 where the corners are split into two pieces
Square-3A Square-2 with pieces which were further split up.
Stair CubeTwo layers of different windmill cubes combines with the middle layer of a Fisher Cube.
Stochastic Cutting CubeA Square-1 (or better: a Star Prism of the Square-1) transformed into hexahedral shape while in midturn.
Stone BlocksA stone-like textured spray paint applied to a Bump Cube.
Super CubixVirtually (if not exactly) identical to the orignial Square-1.