The quality of a render is heavily dependent on the quality of the texture you are applying to the mesh, at least for closeup work. With all on two textures, you sacrifice resolution on some materials for ease of use. You makes your choices and you lives with the results. From anyone's Vicki textures, all I use is Skinhead, Skinbody and brows(after I have cloned then out with the surrounding skin). All other materials are on several separate textures.