I tried it out on an 8MHz V40 (think V20 with onboard peripherals), and it delivers five frames per second. Definitely as smooth if not smoother than Quake on

I tried it out on an 8MHz V40 (think V20 with onboard peripherals), and it delivers five frames per second. Definitely as smooth if not smoother than Quake on a 486DX. (lest we forget that it was the Crysis of its era since hardware 3D acceleration didn't yet exist on most consumer-grade kit) The dithering (on a VGA card and modern LCD) sort of makes it hard to view; an EGA port might be interesting as 16 colours might be enough to make it workable without dithering. Although if they're using 2x2 blocks for dithering, they'd be effectively cutting the number of "pixels" to render by a factor of four, and that might make it viable.