Brown's original pieces only used two-dimensional computer graphics that mimicked a 3-D look. However, in the past few years, computer technology has evolved so that he can simulate surfaces, behaviors and lighting in real time.
Sometimes Brown produces a flower that even amazes him. "I can't work out the particular parameters that would have gone into it, and am left scratching my head," he said. "Because the flowers regenerate every minute or so, it's a fleeting moment, and there is something almost poetic knowing that no one will ever see that one flower again."