How does using a window or door to frame your subject make the picture feel deeper and tell you more about where the subject is?

Using a window or door to frame a subject significantly enhances the picture's perceived depth and provides rich contextual information about the subject's location. This technique, known as sub-framing, establishes a clear sense of three-dimensionality by creating distinct visual layers. The window or door itself acts as a foreground element, the subject is positioned in the middle ground, and the scene beyond the subject forms the background. This layering creates a strong illusion of recession into space. One crucial depth cue this method utilizes is overlap, or occlusion, where the frame partially blocks parts of the....