Oh I didn't think to render trees and ground separately.... but it would make cutting or masking around the trees difficult especially with the soft fir leaves.

(Thanks for suggesting fir leaves, Rosie, it does look a little better.)

I've deleted my tree instances - not really happy with the 1st tree yet.

But!!!  I did manage to get rid of the blue cast over the whole scene.

I had ensured that there were no blues, on the sun, the haze - the ambient colour, cloud colour - anywhere, but couldn't get rid of it.  I did have haze but I'd made sure it was grey - not blue, not even a blue grey.  But in the end I just turned haze off completely and the instant I did so - that excessive blue cast - was gone! 

Hooray!

It made the sky look better too:

Measure your mind's height
by the shade it casts.
Robert Browning (Paracelsus)

Fran's Freestuff

http://franontheedge.blogspot.com/

http://www.FranOnTheEdge.com