Refers to the process of adding realism to a computer graphics
by adding three-dimensional qualities such as shadows and variations in color and shade. One technique for rendering graphics is called ray tracing
. Another type of rendering is scanline rendering, which renders images one vertical line at a time instead of object-by-object as in ray tracing. In general, scanline rendering doesn’t produce as good results as ray tracing, but it is used frequently in animation packages where the image quality of each individual frame isn’t so important.