I like how the suit turned out in this one. It's just some light brushing and overlays I think. I didn't want it super shiny like latex but not flat like spandex, it's just kinda an unrealistic fabric.
According to the notes on the character reference-sheets drawn up by Evolution's lead character designer Steven E. Gordon for use by the show's animators, Rogue has "the biggest breasts of all the girls" while Kitty Pryde takes the opposite extreme of being so flat her breasts "barely extend past her face" with the insistent detail of "NO cleavage!" despite Kitty's uniform having a low neckline.