1. A rendering method comprising: generating, using a processor, a plurality of clone objects corresponding to a predetermined object having a motion in 3D space to which a motion blur effect is to be applied, based on information of the predetermined object illustrated by graphics data; setting transparency of each of the generated clone objects; and rendering the 3D graphics data including the generated plurality of clone objects having the set transparency to a buffer, wherein transparency of the portion where the clone objects overlap from the rendering results, is different from the set transparency, wherein the number of generated clone objects is determined according to hardware resources of a device rendering the 3D graphics data.