Realization of Many-Light Real-Time Global Illumination
Zhang Gui-lian · Journal of Jilin University · 2011
The complexity of many-light global illumination has been limiting its use only to off-line applications.We firstly approximates many light by a single brighter light,and the light paths are traced from this representative light,and VPLs(Virtual Point Lights) are generate at the vertices of these paths.Then,those VPLs are used to illuminating the scene,thus single-bounce indirect illumination can be rendered on currently available graphics hardware at real time rates.The direct illumination of other lights are pre-computed and stored in lightmaps,the contribution of dynamic lights and the resulting indirect illumination from that are computed and then combined with the lightmaps.At last,with little sacrifices in quality,the rendering of global illumination of the many-lights scene with dynamic representative light and dynamic camera achieves interactive rates.