Cool. Try using the backlighting method (search for "backlight" in the forum) This will make it so that you don't have to have all that chunky stuff where the pic is low-res in the foreground. HDRI stands for High Dynamic Range Image. A real HDRI contains special data that effects how the photo behaves in low light and bright light situations, as well as blur, etc. Many high end programs can use these images, but bryce can't, so for our puroposes, we refer to HDRI as a big shell with an image that gets plopped over the scene.