Thanks for all the praise
There's more to come.I deliberately didn't make a high quality rendering because that would make the interior too dark. The render engine does take into account the extra rooms I created on the lower level, but only on the lower level. The "layers" I stacked on top of it don't get the extra light I was hoping for. See the other Brad Pitt house. It has 6 rooms or so on the lower floor, but the rendering is very dark.
I'll start writing the tutorial one of these days.
Hans