基于级联体素纹理的VCT全局光照算法

o solve the problem that the global illumination rendering of large scale scene cant meet the real-time requirement, this paper proposed a voxel cone tracking (VCT) global illumination algorithm. The algorithm includes: a) In the phase of voxelization, this paper proposed a novel scene illumination information representation structure called "cascade voxel textures". This structure can not only greatly reduce the memory consumption of the storage scenes, but also have anisotropy. b) In the phase of illumination calculation, this paper proposed an improved cone tracing filter based on the cascade texture structure. This filter improved the efficiency of illumination injection and reflected light calculation. c) The voxel updating strategy of the scene improved the runtime frame rate of the algorithm. Experimental results show that the proposed algorithm is much better than the original VCT algorithm in reducing the memory and improving the speed. The algorithm meets the real-time requirement of global illumination calculation in large-scale scene.