I really like this image. Missed your post yesterday. It is one of the best Floating Island scenes
I have seen to date. The added birds works well I think. The ground mist/fog is an excellent element in this image.

As for the greying out issue... do you have gamma correction turned off? It helps some to turn it off I have found. I actually always have it turned off.

I agree with Mahray about possibly some definition to where the dome meets the land.

Lol Bryster... Actually Bryster, that is a very cool idea. 8)

There are 10 kinds of people: Those who know binary, and those who don't. 

A whiner is about as useful as a one-legged man at an arse kicking contest.