The author tries to work out the cognitive inferential mechanisms of indirect anaphora in the light of Accessibility Theory put forth by Ariel (1990) and Givenness Hierarchy proposed by Gundel et al(1993).

A special way of antithesis, indirect antithesis, has some sameness with antithesis in its general sense, but also some differences.

Based on the characteristics that indirect illumination distribution is in all directions and lack of variation with the change of its orientation,this paper uses an array of lights to calculate their direct illumination which is accelerated with GPU hardware implementation,and achieves rapid global illumination simulation.