I think I may have mentioned before that I'm a little intimidated by doing scenery. And, like some (many? most?) model railroaders, there are typically two ways to confront such intimidation - well, other than Just Doing It: You either throw money at it (in extreme cases, hiring someone to do it for you), or you research it (to death). The first leaves you lighter of cash, and still bankrupt of skill. The second typically results in Analysis Paralysis.
Now, being the sort that actually WOULD like to develop some scenery skills (and having a wee bit o' the Scots in my blood), I tend heavily toward Option 2 - to wit:
. . . thank you to Mr. Lou Sassi (and, yes, I have the first edition of this book too...)