3D photography involves capturing images that convey a sense of depth, allowing the subject to pop out or sink in relative to the background. Typically, this is achieved by using two lenses or cameras spaced a short distance apart. The images are then combined either in-camera or during post-production. Special viewing methods, such as 3D glasses or specialized screens, are often required to fully appreciate the 3D effect. The technique has applications in various fields including architecture, product photography, and scientific research.