The above is a single render, using relatively medium lighting. The girls are all wearing the same texture. The only difference is the ambient underneath the skin. If the lighting were brighter, like say, DAZ Global #1, the girl in the middle would look like the girl on the left, and the girl on the left would look like the girl on the right. The poor girl on the right would wash out in overexposure. Under default Poser lighting, the girl on the right looks like the girl on the left.
Why do I feel like I just played a shell game?