关键词: 蒙特卡洛 参与介质 光子映射 相函数 辐射估计 光子图

Abstract:

Photon mapping is a new global illumination algorithm developed in recent years. This article presents a twopass algorithm to render the scene including participating media, and this algorithm is an expansion of the rendering to solid  objects with photon mapping. In the first pass, photons are emitted from a light source. We use photon tracing to trace each photon and to construct a volume photon map. In the second pass, rays are emitted from a sigh t point. We use ray tracing to trace each ray and use ray marching to perform recursive radiance estimation with the constructed volume photon map and g et the final intensity.

Key words: Monte Carlo, participating media, photon mapping, phase function, radiance estimation, photon map