Unlike 3-D film and similar techniques, the result is two-dimensional, without visual depth. The resulting images may be stored for viewing later (possibly as an animation) or displayed in real time.ģ-D computer graphics, contrary to what the name suggests, are most often displayed on two-dimensional displays. 3D computer graphics, sometimes called CGI, 3-D-CGI or three-dimensional computer graphics, are graphics that use a three-dimensional representation of geometric data (often Cartesian) that is stored in the computer for the purposes of performing calculations and rendering digital images, usually 2D images but sometimes 3D images.