I find a lot of people are clueless about shadows. It's all very innocent. They just want the power to create images like never before. This software gets them there with a few clicks. Bagginsbill gets them over the top with advanced shaderwork. There's a lot of power in Poser to the casual user. 
Can't draw? Cannot see a scene in your head? A few minutes you are up to your neck in mesh.

great cheap creative pastime. Bad for your back