Playing around with some variations on Callad's lighting techniques.  This time, I took a 12 sided cylinder in Hex and chopped it in half.  Gave it a high gloss black top and bottom.  Sized it out large enough that it would fit behind the camera and still provide that gloss white background.  Then turned the sides into my mesh light.  With the half dome/quarter dome/backdrop setup I was getting about 70k s/s with around 700% efficiency while rendering.  With this setup I was getting around 190k s/s with my efficiecy about the same.  As far as the render itself goes, used stock settings on the model herself and my own blacksmith-created textures on the bra and skirt.