Since we shoot on a 2D plane, creating the illusion of depth is an important aspect of cinematography. Sometimes a few blocking choices, like filming your subjects against walls, can (not always) make a scene look flat and uninteresting. So, let's take a look at what gives a scene depth, and if there's a lack thereof, what options you have to bring your subjects from the dark and boring abyss of the background.
The thing I love about the art of cinematography is that there are no hard and fast rules about how to shoot a beautiful shot. But, there are conventions that work well to create aesthetic energy and depth to your shot. Here is an excellent video by Vimeo Video School that shows you a few ways to do just that.
Again, cinematography is an art, so nothing is set in stone as far as how to set up a shot. However, just like in screenwriting, there are conventions that have worked for ages that are definitely worth knowing. Learn them so you know how to break them! I think I read that in somewhere in Rebel Without a Crew years ago, and it has helped me become a better cinematographer
What do you think? How have you solved depth issues in your shots? Let us know in the comments.