With open frame benchwork. From a article by Stan Trozoniec in Jan.01 CTT “For some, visualizing something from nothing can be daunting.” I do have a gorge planned and a Arch Under bridge in with a wood trestle planned on another track in the same area. I want a open maybe desert look, with mountains, tunnel, open cut in the mountain, bridges. and no room for much town. I do have a 4 track yard not in yet but it will be. This is Hi Rail. Since I know the above I guess you start working with your scenery method and your layout ground develops. How did you figure your scenery?
Check out http://www.sdmodelrailroadm.com/ , under the “exhibits” link take a look at the Tehachapi Pass and the San Diego & Arizona. These may give you some ideas. If you ever make it down this way the museum is a great place to visit.
Largely it’s about the interplay between light and dark. Mountains, trees, rocks, etc. create shadows which is how you get texture. When you look at a scene that you’ve created, ask wether or not it matches the image in your mind. If not, try to figure out why. Should there be more, or less color? Did this scene have a “darker” look when you envisioned it? Do the colors you’ve chosen match what you might see in the real world, or does it look a bit “cartoonish”? Just keep experimenting! [:)]
I’m gonna suggest you check out some of the past articles/videos of David Barrow’s Cat Mountain & Santa Fe for inspiration.
Personally, I “fill my canvas” by going trackside, as well as seeking old photos of the area/time I am trying to recreate. Gets those old hunter/gatherer juices flowing.