| 21. | Ray tracing of a beam of light passing through a medium with changing refractive index.
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| 22. | Ray tracing, if it is limited to Whitted's algorithm, is not necessarily the most realistic.
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| 23. | Conventional ray tracing also typically spawns one reflection ray and one transmission ray per intersection.
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| 24. | Historically, RenderMan used the ray tracing and global illumination.
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| 25. | This partitioning can be used for the efficient implementation of virtual drivethroughs and ray tracing.
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| 26. | The first ray tracing algorithm used for rendering was presented by Arthur Appel in 1968.
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| 27. | However, unlike the majority of ray tracing technique.
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| 28. | At SIGGRAPH 2009, Nvidia announced OptiX, a free API for real-time ray tracing on Nvidia GPUs.
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| 29. | Arnold is based on Monte Carlo Ray Tracing.
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| 30. | For each pixel, the scene is ray traced until the closest surface of intersection is found.
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