All very good and constructive comments gents.
Have had fun playing around with masks in CS3 this afternoon.
Here is another version which I think is more "natural" looking - obviously not as good as what appears on ISS, but considering my equipment ok I guess.
High res:
https://www.flickr.com/photos/johnka...ream/lightbox/
Only a matter of time during 2015 before I go to mono.
Clear skies and merry Xmas to all.
John K.