The effect is mostly an optical illusion. The stars are all just a boxed 
pigment, so a graduated square, with poly_wave 2 to accentuate it a bit. The 
reason it looks like a cross shaped flare not a square is an optical 
illusion caused by the way your eyes see sharp angles in a gradient, it 
amplifies the sharpness making it look like a nice complicated flare effect! 
I love optical illusions :)

-- 
Tek
http://evilsuperbrain.com

"Cousin Ricky" <ric### [at] yahoocom> wrote in message 
news:web.452a818d918e4d9043a5e2560@news.povray.org...
> "Tek" <tek### [at] evilsuperbraincom> wrote:
>> I was messing with crackle-based isosurfaces and found something that 
>> feels
>> like old-stylee vector graphics. So I made some asteroids in this sort of
>> cute retro scene. I don't think I'm gonna develop it any further but 
>> thought
>> I'd post it here to see what people think.
>
> How did you do the diffraction artifacts on the stars?
>
> (Related to that, i discovered (serendipitously :-) that shadow 
> diffraction
> can be simulated by using area_light with cheap parameters.)
>
>
>
>
>

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