I have a problem with the dark skin of a figure: it is the Bantu Lady of the Evolution One figure from Erogenesis. The skin is supposed to be dark, but not so that you can hardly see anything. On the right is a V4 for comparison. On the other picture you can see Nordic Girl on the right, also an Evolution One figure. I have already compared the settings in the Material Room, but they seem to be identical.

How can I get a better detailed skin, so that you can see shadows and reflections and the figure is not that dark?