The `perspective` property

You can achieve some pretty cool effects with it.

Alternating bottom perspective view from 15cm to 40cm

.box {
  transform: rotateY(30deg);
}

.box-container {
  perspective: 15cm;
  perspective-origin: bottom;
  animation: orbit 2s ease-in-out infinite alternate-reverse;
}

@keyframes orbit {
  to { perspective: 40cm; }
}