How using a backdrop can save time and money:

Most of the time in theatre and movies you will see things in the background that look real. This real image is often a painting or a picture placed in the background to project a real setting. The image is called a backdrop. Backdrops save directors a lot of time and money because they don't have to pay for a location. The director doesn't have to travel either. Backdrops are used in almost every production. They often look so real that the eye can't tell the difference.