Anyone have any suggestions on good Background for behind the HO layout, such as trees, woods, industry and plants, etc... Trying to also add in a Pittsburgh City Scenery from 4x6 photo blown up, will see.
It should blend with your modeled forground scenery. For instance if you model a mountain pass, don't put a steel mill in the background halfway up the mountain. Don't put more detail into the backdrop than you have in the forground modeled part. If you aren't sure what to put on the backdrop, sky is good.