From the course: 3ds Max 2019: Advanced Lighting
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Global illumination - 3ds Max Tutorial
From the course: 3ds Max 2019: Advanced Lighting
Global illumination
- [Instructor] Global illumination is a term that can have more than one meaning. Its base meaning is any algorithm that calculates the light interaction among multiple surfaces in a 3D scene. The opposite of global illumination is local illumination, in which each surface is lit separately, and there's no interaction among them. But of course for realism, we do need some global illumination, in which light is transferred among surfaces. In its broadest definition, global illumination would encompass ray tracing of specular reflections, but most people now use GI in a narrow sense, and by that, they mean ambient lighting in the scene. Ambient light then breaks down into the overall illumination from the environment, and that's a suffuse illumination coming from a large light source such as the sky. And GI also must encompass the interreflection among objects of diffuse illumination. In other words, color bleed. When you have a red carpet next to a white wall, you'll get some red…
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