I have to agree with AgentS. I really don't see such a difference in using 12-20 light sources instead of 100-150 (or even 1200, as someone said lately!), if not in the geological render times the monstruos light-domes imply. Of course, it could be only a matter of personal tastes, but it reminds me of the difference between a good mp3 at 320kbit and a CD: you can notice it only if you have a very finely-tuned hi-fi. Just my 2c, Stefano