Thanks folks!
@ Oshyan, yes the 'cloud/steam' layer has gained some subtle variation in lighting... I was hoping for some more dramatic effect.... So I guess it all depends on sun angle and landscape; it's not going to be as effective everywhere!
Still, like I said, some subtle change has helped imho...
I might try plugging in a power fractal or similar to the shadow slot in the cloud layer, see if that yields any results...
Still tweaking the models...
@ Michael, yes I had thought of some water, also some lava pool at one point lol... We shall see, cutting it fine for messing about with water settings...!
Had a quick test... Hmmmm as the crater is in shadow, it is hard to get the water to look how I want... Maybe tinker some more after Saturday
Cheers
J