meh i give up on this lol

but btw nomuse, the prism effect did have a solution, quite a good one accually
there was a thread in the poser forums for it, somewhere around 12 months ago
was during the time i worked on gem mats, and now you got my mind thinking of
pretty gems again and not my work :) damn you lol

not sure if i still have the saved material, but i remember the angle the light went in
along with a refraction node doing something, caused the colors of the material to
change to different colors of the rainbow, looked great

with better raytracing of carrara,  i'm tempted to look into it again
but poser had a diffuse node, allowing the amount of "energy" from lights to be a
variable used, and i know that node was also part of it, so might not work in carrara -_-

as for a simple workaround mentioned to me at work, but never tested for myself
render 3 images, 1 with red value of your lights only, 1 blue, 1 green, each time
changing the refraction index, then assemble again in a paint program
i was told it gets good results as well, but too busy to try :(

oh well back to work, might look into gems later