it's funny: i've mastered IBLs, but i now wish i knew studio and stage lighting!

my brightest IBL tends to be no more than 70%, and i usually use it with a shadowless infinite for ground bounce, and main fill and accent spotlights with bagginsbill's inverse square falloff.  for my ibl, i just use masks to separate top, bottom, left, right, back and front and give them different colors.  i use my own masks, but Olivier has some for download in the Poser 6 & 7 forum at RDNA.  i've read someone there post that the IBL is so blurred and diffuse that resolution higher than 6 pixels is wasted, so i figure a rough approximation of the color orientation i want is probably enough. 

when i get home i can post my latest test images, if you're interested.