Am 31.08.2012 09:00, schrieb mathieu_r:
> What's the difference between an object emitting light using an emission media
> and a light which Looks_Like an object?

I'm referring to objects emitting light via the new "emission" finish 
parameter (in POV-Ray 3.6, "ambient" would have been mis-used for that 
purpose).

If the object is comparatively simple (such as a sphere) and/or not too 
close to any surface, I'd recommend an area light with a looks_like 
object, as it's usually faster, does work with highlights (phong or 
specular), and doesn't necessarily need radiosity to work.

To use an object with an "emission" finish term you need radiosity, and 
it's difficult to get highlight effects. OTOH it often gives more 
realistic results if the emitting object is close to a surface and 
comparatively complex.

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