Dave makes a good point.
I remember Spookshow talking over on the Atlas forum about giving a stucco finish to one of his buildings on the Hope layout and in the discussion the point was brought up that if you gave it a true, N-scale stucco finish that it wouldn't see the stucco.
The bottom line being that there are some things like stucco, bricks and maybe even soil texture that need to be larger than their N-scale equivalents in order to be convincing.