virtual dirt

From BBC
This quote form Bill Viola on the future of technology is really poignant - we all thrive on a bit of imperfection and mess around us:
Bill Viola: I've been working on a 3D virtual-world project for a while. We were looking at some models of spaces and how you move through them, and it occurred to me, after seeing countless demos, that there was not a speck of dirt anywhere. You'd walk through and you didn't leave footprints. I wanted to have dirt in my world, but the guy said: "We don't have enough memory for that."