From the course: Introduction to Lights in V-Ray Next
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Understanding light decay
From the course: Introduction to Lights in V-Ray Next
Understanding light decay
- [Instructor] When working with lights inside any computer graphics application, there are typically speaking two options that can help us control the distance in the scene over which light energy is allowed to travel. One is attenuation, which is a forced cut off point beyond which light energy isn't allowed to travel or be calculated with a typical set of controls for this using both near and far, or start and end points. An important fact to keep in mind regarding attenuation though is that it definitely is not a naturally occurring phenomena. In the real world, light has no mechanism whereby we can tell it not to travel beyond a fixed point in space. If you have ever tried to create a completely blacked out environment, then you will have probably wish that such a control did exist given the fact that light seems to find a way to get into a room, no matter how hard we try to block it out. Decay or fall off by…
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