Great ref pics! It's funny cos if I'd made those in the foreground of the last pic, I'd be a little critical that they looked a little unreal because the valleys are so equally spaced Well, I say a little....:-D I'd be pretty happy with em. I sometimes look at my terrain and think, that doesn't look quite right. Take this pic:
http://earth.imagico.de/views/alaska_large.jpg

The glacial runs look like motorways and I have a few of those in my terrain, and coincidentally I've even got the east west glacial valley running just behind the bank of hills in the foreground- I thought that that feature was fighting against the natural flow of the landscape, and I was going to erase it, but it's here in rl!

ps check out this site:
http://earth.imagico.de/map.php?area=earth

monks