Here is a different view on the topic: While a lot can be (and has been) said about the merits of complex global lighting, I hardly think it is a requirement for "realistic" rendering. I for one, don't always like the "muddy" characteristic of many CGL renders. But as far as "realism" goes, there can be a lot of artistic license applied to that concept. I think this render is fairly realistic, and it only uses 3 lights. It is straight out of Poser 5 without any postwork and only took about 15 seconds to render on an old P3 machine. Just another way of looking at the topic :-)