Ok so the Image finally finished rendering, Approx 45 hours.
I moved the sun around and it looks nicer on the trees now creating a little more light in the darker areas, The clouds are now more in control and look better but could still be tweaked some more in my opinion, the Cirrus clouds i played with and dont like this result so i will go back to the previous ones.
The main problem now is that our beloved TG2 appears to be having problems with the soft shadowing on the domes of the observatories. not sure why as the geometry for those domes is mathematically perfect, no imperfections. If you look at the Solar towar (top right ) you can make out a nice soft shadow around the object. Any thoughts on how i can fix this ? at the moment the polygons are quads, would triangles help ??
Graham.