:after
top
50% 50%
bottom
(10px, 10px, 200px)
(0, 0, -100px)
(0, 0, 0)
scale3d(1.2, 1.2, 1)
(0, 0, 1, 45deg)
(1, 1, 1, 45deg)
(-1, -1, -1, 45deg)
preserve-3d
flat
B
visible
hidden