I only see a shadow being cast from the left side of your model's body. There's nothing showing of the shadow that would be cast by the model's right side bodyline nor of what I would expect to see on the floor. You may need to place several lights at the center of your lamp, all pointed in different directions in order to be able to pick up all the angles since there isn't a point light or omni light option available in Poser. Hope this helps! pixelslave