Real-time volumetric lighting using polygonal light volume

In this paper, we present a novel method to simulate single scattering in homogeneous participating media, which can greatly enhance the immersion of environment simulation. We construct a light volume with a polygonal mesh based on shadow map to restrict the ray-marching segments, place samples at discontinuities along the epipolar lines of the final image to speed up the ray-marching process, and add support for textured light. Our method is implemented on GPUs, and can render a complex scene with participating media in real time.