Thanks to all of you!
@Moodflow: Glad you like it!
I also tried your "Frozen" clip on it, but it made it look to small.
It´s brillant for ice layers on rock, not for massive ice like mine here I think.
@ Bigben:
You are right, the enviro- color doesn´t look right.
Although it is exactly the same as the blueskye, my blueskye is changed.
I hoped for some interesting contrast between a less green skye and the ice, but it makes the image less realistic.
As for higher GI- settings I will have to wait till I got a faster Computer. its 2/2 at the moment and already took its time.