Backdrop is very important when you have a wall-hugging type layout and shelf type layout because it will create a proper environment and enhance your layout’s scenery.
Making a backdrop is not really difficult as you think, but not too easy. It will take you a tiny effort and a little time to make a perfect one.
If you have a wall-hugging layout, you may want to hide the corners of the room because the corners of the room are not realistic to be used as a scene. You can use hardboard and attach it to the walls that extend from the layout to the ceiling. Make sure that you use hardboard that is flexible enough to make a good rounded area. After you placed the hardboards, use a spackling compound and drywall tape to cover the seams. Sand the seams once the compound dries to make a nice flat surface.
After sanding the seams, next is painting your backdrop with any scenery you desire. It may be clouds, ocean, forest and etc. If you don’t want to paint because it is messy, then you can have printed scenery using your own photographs or you can mix the painting and the printed scenery.