We are creating digital images based on 3D data stored within a computer.
However, in mechanicalengineering, 3D rendering is usually referred to as the process of converting mechanical 3D models (such as .obj, .max, .stl, .iges, .dxf, .dwg, etc) into photorealistic animation and/or picture as it is taken in real life. 3D rendering is the most viable option to rely upon because of the detailed and crystal clear three-dimensional visual representation of the final product it brings forth.