I will soon be adding this to the tutorial section of my site but since I originally posted the technique here without any example pics I wanted to do an update. Three seperate renders were done. In each render the lighting and textures for the figure were changed. Also I subtly morphed the face differently in each as well. The third render was later overexposed and blurred. Then the three were overlapped inpainter 3D as layers with various degrees of opacity. Anyway you get the idea.