Le 16-02-11 09:41, Stephen a écrit :
> On 2/11/2016 12:45 PM, Sven Littkowski wrote:
>> Thanks. There are two keywords in it, which will help me now to
>> investigate better: scattering and absorption.
>>
>
> There is also emission which you could use for the central light source.
> I was going to mention Rune Johansen's "electric.inc" but that uses the
> glow keyword which requires MegaPov. So it will not work with the
> official PovRay.
> Nevertheless Rune's site does have some good include files that you
> might find useful. I often use his Grass Tex Include File and his
> Particle System is good too.
>

For the glow, you can use emissive media with an appropriate pattern. 
The spherical pattern is often the best suitted one, followed by 
cylindrical.

media{emission Colour}
This gives you an uniform glowing media.

sphere{0, 1 pigment{rgbt 1}
  hollow
  media{emission Colour density{spherical}}
}

gives you a spherical glowing media, contained within an unit sphere, 
that goes from full strength at the center and drop to zero at the 
surface of the sphere.



Alain

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