9.) And this is'nt near as important as some other questions, but I still do'nt know where this color comes from. How is this ground color changed? I tried reading pg. 213-215, on Backdrops and Backgrounds, but still have no luck changing it. As is the scene renders almost immediately, but as soon as I introduce an Infinite Plane, or Finite Plane, to change the brown color, the render time soares somewhere over %400!