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Why doesn the lights intensity in the sample light shader fall off with r2, as light does in real life?

April 26, 2017fall intensity life light R2 sample shader

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Why doesn the lights intensity in the sample light shader fall off with r2, as light does in real life?

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This is a classic graphics hack that is often done either for performance or for expedience. No real reason that it doesn’t fall off; it can be easier to control that way in the interests of achieving some effect. Your shaders don’t need to implement r2 falloff, though you’re free to do so.