What is Ray Tracing?

Ray tracing is a technology that calculates the path of the visual field and finds the reflector and the corresponding light source to simulate the lighting effect. In the real world, when light shines on an object, some of the light is absorbed, some is reflected, and some is seen by the eye, and the presence of the object is recognized when the light reflected from the object and its surroundings is observed by the glasses. And ray tracing is to display the screen "lens" as the human eye, shooting invisible light to surrender the object in the screen, and then calculate whether it can match the light source in the screen, and according to the calculated light brightness of the screen to display. This technology concept was originally proposed in 1969 by IBM employee Arthur Appel prototype, in 1979

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