Here is what I mean. Rubios new dress. texture set to none. colour to very very light blue, highlight colour to very very light turquoise blue, bump map and trans map only used. no reflection. Silmilar with cat suit underneath, only there I did use a tex map. Irridescence in poser 4

The greatest part of wisdom is learning to develop  the ineffable genius of extracting the "neither here nor there" out of any situation...."