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Old 26-10-2007, 11:36 PM   #1
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Default Specular Lighting Map

I was just curious...what is a specular light, and whats a specular lighting it like similar to a photon map??
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Old 26-10-2007, 11:43 PM   #2
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A spec light is one which only contributes specular components to the render e.g. you turn off diffuse calculations for the light.

And by specular lighting map do you mean just a regular spec map? if so it's just a greyscale map of where spec is allowed to happen and where it's not. It's essentially a multiplier so white being 1 and black being 0. so for example you have a piece of geo which has a spec hit on it. if your map says that this area is black then it gets multiplied by 0 and thus the spec component is removed (remember that anything x0 == 0)

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