Real-time modeling and rendering of wet road in raining scene

The simulation of the wet road will greatly enhance the reality of a raining scene. By analyzing the physical mechanism of wet effect, we propose a double-reflection model of the wet road. Based on the subsurface scattering theory and the Torrance-Sparrow lighting model, the realistic reflections of the surrounding scene on the wet road are simulated. The reflection and refraction rays are traced with a novel path tracing algorithm. By incorporating the GPU technique, various conditions of wet road can be rendered in real time, and the results are quite realistic.