Abstract
Interactive global illumination (GI) plays an important role in movie production and many applications generated by computer graphics. In this paper, we focus on a fast method to produce interactive GI by reusing the light transport path of static geometry in the virtual scene. Our method divides the 3D scene into two categories: static and dynamic geometric objects. The scenes are managed by two structures called SSG and DSG respectively. For the static objects, the transport path is reused between adjacent frames by a bidirectional light tracing strategy, which reduce the computing cost and the noise due to the randomness of sampled light sources. The experimental results show that the proposed method can reduce the computation time up to 30% compared with traditional path tracing.
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