The coloring, rock work and ground foam use is great. I don't want to nit pick, but one thing bothers me. There are no cuts in the hillside before the tunnel portals. Real railroads usually cut the right of way into the hillside for some distance before the tunnel, While there is a prototype for everything, the way your portals are now, is uncommon, and makes the hillside look as if it was added after the track. But otherwise your on the right track!