Hrm. Tried the Shimmery Light Silk today and got a strange return in the render. It was almost glowing white with thin (almost marble-like) bands of green and blue. Was with one spotlight and IDL, with somewhere in the neighborhood of a 50% exposure (I estimate, obviously) according to BB's LightMeter. I didn't save it, but I'll see if I can reproduce the effect after I'm done with this project I'm working on.

花 | 美 | 花美 | 花火 
...It's a pun.