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V-Ray for SketchUp â Materials â The Refraction Layer â V-Ray Tutorials. Refraction means the change of direction of a ray of light in passing at an angle from one medium to another. With V-Ray the refraction layer is used to create glass or translucent materials. How to use the refraction layer to create glass or translucency materials in this video tutorial.
Since you are all connected in a wave front, the entire wave shifts directions (refracts) as it passes through the boundary between field and mud! The index of refraction (n) is a measure of how much light slows down in a material. In a vacuum, all electromagnetic waves have a speed of c=3*10 8 m/s.