The bright cyan border and text just don't go. Ice fortress? this is clearly only two snowy rocks. Just use the white layer if you're gonna go with icy feel. Use different shades of white or something (not sure how terragen is laid out, I don't use it, mainly because it blows and is utterly useless except for creating one frame terrain pictures) Better than your last picture, I can kind of see this being a more realistically possible terrain. Some vegatation might be nice.