A 3D picture, also known as a 3D image, is a representation of an object or scene that appears to have depth, allowing the viewer to perceive the image as having height, width, and depth. Unlike traditional 2D pictures, which only have height and width, 3D pictures give the impression of volume and distance. They can be created using a variety of techniques, including computer-generated imagery (CGI), stereoscopic photography, and holographic imaging. 3D pictures can be viewed on a variety of devices, such as 3D televisions, virtual reality headsets, and special glasses that use the technique of stereopsis to create the illusion of depth.