A bidirectional path tracing method for global illumination rendering on GPU

This paper proposes a new method for synthetic images rendering with Global Illumination on Graphics Processing Units (GPU). The method is based on Bidirectional Path Tracing in which we truncated path lenghts to improve GPU performance and introduced a number of Virtual Light Points to organize the Light Tracing pass. Results show that a rendered image is accurated if confronted with the corresponding reference image, and it is synthetized at a reasonably interactive rate when the algorithm is implemented on a commodity GPU