Am 10.12.2010 18:53, schrieb Tek:
> This may have been asked before, but is there any way to make specular fade off
> with fresnel (or reflection falloff)?
>
> The reason I ask is because of these rather interesting demonstrations of
> real-world specular&  fresnel:
> Everything is Shiny: http://filmicgames.com/archives/547
> Everything has Fresnel: http://filmicgames.com/archives/557
>
> Clearly materials in the real world have specular that fades with fresnel. But
> the only way I can think to achieve that in POV (3.7 beta) is to use an aoi
> texture to blend between 2 different finishes. Which then means I can't use a
> normal map (since the aoi uses the true shape of the surface).
>
> Any ideas?

POV-Ray uses a fresnel term in the metallic version of specular. Using 
an rgbt <0,0,0,1> top texture layer with "metallic" directly in the 
finish statement might do the trick. I'm not exactly sure though - it 
might have just the opposite effect of what's desired.

Another one for my personal To-Do list...

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