Global Lighting Based on Functionally Defined Surfaces and Voxels in Real Time Using a GPU

A method for calculating global illumination in dynamic 3D scenes with functionally defined surfaces is presented. In many applications, such as video games, simulators, etc., methods for calculating real-time global illumination are needed. In the proposed method is evaluated real-time lighting. Optimal path sampling is used for light transfer. The direction scattering and distance sampling affect the trajectory. The distance sampling is used in proportion to the product of the transmittance and the scattered radiation. The scattering directions are selected depending on the phase function and the incident radiation. Therefore, the calculation errors are reduced compared to the known methods.