Ray tracing has always been the "holy grail" of computer graphics, says Jason Ronald, head of program management for the gaming console Xbox. The technique simulates a three-dimensional image by calculating each ray of light and promises stunning lighting effects with realistic reflections and shadows. The method finds where it bounces, collects information about what those objects are, then uses it to lay down a pixel and compose a scene.
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https://www.bbc.com/news/business-52541218?source=Snapzu
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