Hi to everyone, my question is how can make osprey style terrains like belows?

http://www.quickerbuy.com/assets/pho...ey-book-70.jpg

http://www.military-prints.com/image...ey13_small.jpg

http://www.military-prints.com/images/osprey7_small.jpg
http://www.quickerbuy.com/assets/pho...gn-book-61.jpg