A bidirectional path tracing method for global illumination rendering on GPU

This article 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 shows that a rendered image is accurate if confronted with the corresponding reference image, and it is sythetized at a reasonably interactive rate when the algorithm is implemented on a commodity GPU.