Other materials are opaque and can not transmit any light though they can certainly reflect it very well. The important question we will need to answer in this chapter is how do we know how much light is transmitted versus how much light is reflected? To answer this question, we will need to learn about the Fresnel effect. Light can pass through them, a phenomenon we call transmission and they can reflect light at the same time. Glass or water are two very common materials that exhibit both properties. Reflection and refraction are very common in the real world and can be observed every day. Reflection, Refraction (Transmission), and Fresnel Reflection, Refraction and Fresnel Reading time: 29 mins. Normals, Vertex Normals and Facing Ratio.What is Shading: Light-Matter interaction.
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