The Walthers Cornerstone HO Scale River City Textiles Background Building is a great way to add an industry to your layout between your rearmost tracks and your backdrop. The finished model gives the appearance of a full-size building behind other structures-even though it's only 2-3/8" deep. Like many big city buildings, this factory has a concrete freight car loading dock. Install a spur and add more operating fun to the small space between your layout and background scene.