The iceland should by far NOT be smooth >.> Ever wondered what the function of lighthouses are? So that ships wont hit reefs, and otherwise sharp cliff like icelands at sea. Make it one main large iceland and many small reef-like ones around it, then use the steinlord rock, if you have it, and tint it to get a cliffy like iceland terrain, and just for the hell of it you could make it dark and add some fog to it so that it would seem loomy.