If you use only Poser for your artwork, you are limiting yourself severely in what ou can accomplish, don't get me wrong Poser is amazing for what it does, I know firsthand how hard it is to bone and constrain a human body. But the render engine although improved is IMHO nowhere near professionnal quality. If you want to take it a step further you have to have other apps, a 3d app for modelling and rendering and an image editing program. Even 3d animation gets heavily post processed. Most elements in a 3d animation are rendered individually in layers and then composited afterwards for more control on lighting etc....