The clouds are recognizable as being from the clip, but I do not take credit for creating it.  It comes from the Preset file available on the Planetside website.  Knowing that you are still using a less than optimal computer, I can't imagine the render time.  It took over 3 hours for atmo alone  on my usually fast machine.  I like the idea of the vegetation only on the outcrop - it is a concept I've been considering, jut not yet gotten into.