In 1984, IBM announced a new PC called the AT, which used the Intel 80286 microprocessor running at 8 MHz. The AT stood for Advanced Technology. Sounds funny now, but then it was the coolest piece of technology around. A California company called Cubicomp wrote software for it that created amazing 3-D animation for the time. The only drawback is that at 8 MHz, it took a very long time to render each frame of animation.

Tim Tolman was an early developer of Cubicomp animation.
Below is a demo reel of his work from 1990.