what kind of distortions did you use on the mediterrainian map it looks like you used as refereance?
it looks like it's been elongated width wise or trunkated vertically.
I like the scale of the project, It makes it far more impressive. I wish I could get a closer look at your trees and lakes (as this is an area I need to study up on. by shading one side of your mountains you can give a bit more richness and depth to the map and also help to indicate the east and west directions.
Also What comes to me for ice realms might be to study pictires of glaciers, or just make a ragged cliff with a few sharp lightening style cracks in it and watery run offs. Icebergs to the north sort of stuff to differenciate it from rock.
How long did this take you to do By the way?