transform: value;

Box 1

perspective(500px)
rotateY(45deg)

Box 2

perspective(500px)
translateY(8px)
rotateY(45deg)

Box 3

perspective(500px)
scale(0.7)
rotateY(45deg)

Box 4

matrix3d(0.6, 0.1, 0.7, 0,
-0.5, 0.8, 0.1, 0,
-0.6, -0.5, 0.5, 0,
0, 0, 0, 1)