The millimeter-wave radar stuff is superimposed much more cleanly and crisply in neon green. Anything made of metal shows up. Hiro is now navigating down a grainy, charcoal-gray avenue of water lined with grainy, light gray pontoon bridges tied up to crisp neon-green barges and ships that glow reddishly from place to place, wherever they are generating heat. It's not pretty. In fact, it's so ugly that it probably explains why gargoyles are, in general, so socially retarded. But it's a lot more useful than the charcoal-on-ebony view he had before.