Here's another example of a simple shader that relies solely on PBR textures. In addition to color, normal, and roughness, there are also Emission and metallic maps.

The beauty of creating PBR-compatible maps is that they can be used in both Poser SuperFly (La Femme on the left) and DAZ Studio iRay (shown on the right). with fairly consistent results. Main difference here is in lighting, not the shader itself.