What is backward tracing vs. forward tracing?
什么是向前追溯，什么是向后追溯？
As we know, almost the all ray-tracers are based on Backward Ray-Tracing, cast rays from camera, sample the lights, not emit photon from light sources.
我们都知道如今大部分渲染器是后向的不是前向的。从摄影机发射光线，命中物体后采样。
As we know, almost the all ray-tracers are based on Backward Ray-Tracing, cast rays from camera, sample the lights, not emit photon from light sources.
我们都知道如今大部分渲染器是后向的不是前向的。从摄影机发射光线，命中物体后采样。
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