In this example the intensity and blur of shadows will be achieved in post production so I've used ray traced shadows to give me perfect black shadows with a hard outline. 在这个示例中阴影的强度和模糊度将在后期处理中完成,所以我是用光线跟踪(RT)类型的阴影来产生完美的黑色硬边阴影。
This method establishes Cartesian coordinate system firstly, and then the specific ray is traced. 该方法是在建立的直角坐标系中对光线进行追迹。