>>> (Isn't this what the "metallic" keyword in POV-ray does too?)
>>
>> Actually the "metallic" keyword affects surface hilights only.
> 
> There are two 'metallic' keywords - one for highlights, and one for 
> specular reflection.

...there are?? o_O

>> Which leads to another question: Do surface hilights really exist? Or 
>> are they just reflections of the shape of the light source?
> 
> Yes, and yes.

Hmm. I see. I think...

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