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Following the suggestions made in
http://news.povray.org/povray.general/thread/%3Cweb.5b096a17747d6b9c3ce674f0%40news.povray.org%3E/
I tried to create a series of blur duplicates as the tail and came up with a
code of like
sphere{ <0,0,0>,0.27 pigment{rgb <1,0,0>}}
#declare Nr = 1;
#while (Nr>0)
sphere{ <0,0,0>,0.27 pigment{rgbf <1,1,1,Nr>}
hollow
interior{
media{
scattering{Nr,<1,1,1>}
intervals 3
samples 1,1
}
}
translate <Nr,0,0>
}
#declare Nr = Nr - 0.1;
#end
It is getting close but far from a realistic motion blur. Any suggestion?
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What you're doing is mixing a filter pigment with your media.
Make the spheres of the tail (the container for the media fully transparent.
Then to avoid the coincident surface problem, scale the spheres a little smaller
then the comet sphere.
sphere{ <0,0,0>,0.27 pigment{rgb <1,0,0>}}
#declare Nr = 1;
#while (Nr>0)
sphere{ <0,0,0>,0.26 pigment{rgbt <1,1,1,1>}
hollow
interior{
media{
scattering{Nr,<1,1,1>}
intervals 3
samples 1,1
}
}
translate <Nr,0,0>
}
#declare Nr = Nr - 0.1;
#end
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Le 18-05-28 à 11:21, Kima a écrit :
> Following the suggestions made in
>
http://news.povray.org/povray.general/thread/%3Cweb.5b096a17747d6b9c3ce674f0%40news.povray.org%3E/
>
> I tried to create a series of blur duplicates as the tail and came up with a
> code of like
>
> sphere{ <0,0,0>,0.27 pigment{rgb <1,0,0>}}
> #declare Nr = 1;
> #while (Nr>0)
>
> sphere{ <0,0,0>,0.27 pigment{rgbf <1,1,1,Nr>}
>
> hollow
> interior{
> media{
> scattering{Nr,<1,1,1>}
> //intervals 3
Never use ANYTHING but the default of 1 for intrvals !
> samples 1,1
Increase this. You only get a single sample whitch is not enough.
The default is : samples 10.
Also, the second value is always silently discarted.
> }
> }
> translate <Nr,0,0>
> }
>
> #declare Nr = Nr - 0.1;
> #end
>
> It is getting close but far from a realistic motion blur. Any suggestion?
>
>
For media, the defaults are :
method 3
intervals 1
samples 10
confidence is NOT used
variance is NOT used
Only the first value of samples is ever used if you provide two.
Using intervals >1 greatly impaire your rendering speed.
Using intervals with a value larger than 1 is only adviseable if using
method 1 or 2.
As your spheres overlap, you see the boundaries. It would be beter to
use a single larger, and fully transparent, sphere and modulate the
media density instead.
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