The Basics

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The Basics

The basic idea of any system is to simulate light rays moving from a light source and calculate the intensity based on each infinitely small point on a material. See Figure 5.1. A basic rendering system must therefore have the ability to generate rays, intersect rays with the scene, calculate the lighting per interaction, and perform reflection and refraction. These capabilities can be extended to accommodate more complex natural lighting effects such as diffusive reflections, indirect lighting, and color bleeding.

Figure 5.1. The basic idea behind rendering.

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