Need input for open area

Not being able to see the entire section in context makes it difficult to suggest a solution.

My first thought was to texture the surface of 1" foam board and paint like rocks. You could cut a relief in the back for the supports.

I see where one pic is not enough. Here are more pics of the area I want top add to. The area is 8 inches high by approximately 24 ft long. It sits behind the freight yard and the lower mainlines. I was thinking about backs of buildings  or some kind of background mural glued to Luan board. Looking for the right stuff as close to 8 inches high because I don't want to cut off too much of either the buildings or the murals to fit. As always thanks for the help ahead of time.................Paul

Paul:

Do you have room to cover the shelf supports? If so then building fronts may be appropriate. If not you may have to go with what Moonman said.

With an 8 inch height you will need to stay with OGR 2-story buildings. I believe the 3-story buildings are 9 inches high. Another approach is DPM walls.

Joe

The shelf brackets I use tapper down on the 2X4's. I was going to make some furring strips to go along one side of the bracket, thick enough so I can attach Luan board to it. With the input I got from everyone on here. I am going to go with backs of buildings. But I have to find ones that are 8 inches high so I don't have to cut off too much of the buildings..................Paul