Apply the image as a texture onto a 2D face and place it behinde all of your objects in the scene. Be sure to have it fit the borders of your window, and to have it facing your point of view. oooooooooooooor, you can always go the Photoshop route if you own a copy. if you go the first route, you'll need to mess with lights and all of that to get the right look. Hope this helps!!!