After having a large outdoor layout for a number of years the layout sustained a lot of damage from our dust devils here on the desert.
I decided to reduce my layout to a switching layout and move indoors.
The Dirty and Dusty Railway will need ideas since I haven’t been inside since the HO days of my youth.
What are you using to simulate ground on the flat surfaces? And what are you using for those flat surfaces? Are you using 3/4 inch plywood or something not as costly?