Path tracing is one of several techniques to render photorealistic im-
ages by simulating the physics of light propagation within a scene. The
roots of path tracing are outside of computer graphics, in the Monte
Carlo simulations developed for neutron transport. A great strength of
path tracing is that it is conceptually, mathematically, and often-times
algorithmically simple and elegant, yet it is very general. Until recently,
however, brute-force path tracing techniques were simply too noisy and
slow to be practical for movie production rendering. They therefore re-
ceived little usage outside of academia, except perhaps to generate an
occasional reference image to validate the correctness of other (faster
but less general) rendering algorithms. The last ten years have seen
a dramatic shift in this balance, and path tracing techniques are now
widely used. This shift was partially fueled by steadily increasing com-
putational power and memory, but also by significant improvements in
sampling, rendering, and denoising techniques. In this survey, we pro-
vide an overview of path tracing and highlight important milestones
in its development that have led to it becoming the preferred movie
rendering technique today.
2021-10-08 20:09:41
22.78MB
图形学
路径追踪
1