Research and application of global illumination in tower simulator with Cascaded Light Propagation Volumes

To obtain higher efficiency and better visual veracity in complex, dynamic, real-time tower simulator scenes, we present a method named Cascaded Light Propagation Volumes of global illumination in this paper, which is based on the GPU-programmable rendering pipelines, then rendering the real-time global illumination. In the process of representing the spatial distribution of light in the tower simulator scenes, we use some techniques like reflective shadow maps, spherical harmonics and virtual point lights to actualize this method. At the same time, by using the nested lattices, we simplify the large scenes´ complexity and make the real-time rendering more efficient. Through analyzing the experimental results, we could prove that this method can generate the global illumination quickly in the tower simulator and has high efficiency and better realistic compared with Ray tracing method and pre-computed radiance transfer (PRT) method.