A (rather terrible) set of vein morphs for G2M that’s no longer for sale. From the blurb:
Are you looking for that additional touch of realism in your male characters? This set adds realistic surface veins for Genesis 2 Male(s), including veins on the limbs, neck, face, and anatomical elements. These are suitable for an ordinary athletic man, and as such can be mixed and combined with more intense sets already available in texture or displacement form. Because they are HD morphs, they are “UV neutral” and will work with any texture set on any UV.