Quote - It could be the scale of you scene.  Mine is quite small scale even though it looks vast. 

Thanks for the rocks Akhbour, if I do any more ripoff type scenes I'll use them instead of my metablobs

Over 4 hours and it's still rendering so can't post the piccy yet !

I had to use your cloud settings but I had to rotate the camera till you're able to see the low clouds; it was difficult 'cause your cloud settings are not in m,cm,mm but yard,inch...and I don't know inch,yard....
I have simply load a procedural terran + an ecosystem...for this testbut I haven't the kind of trees they are using in the movie: I speak about this big center tree with a big root.