For our current campaign, I've been making a few Photoshopped "what the terrain looks like" images.
http://asmrb.pbworks.com/f/135869475...20road%207.jpg
http://asmrb.pbworks.com/f/136261542...rds%20Bend.jpg
http://asmrb.pbworks.com/f/136624649...oned%20I90.jpg
http://asmrb.pbworks.com/f/136977386...e%20Salmon.jpg
Vegetation grows up through the asphalt, sand and dirt blow over it, volcanic ash can cover areas meters deep ...
--
Michael B.