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Joost Smits wrote:
> Dear all,
>
> I got lost a bit. I always used halos in PovRay 3.0, for example to make
>
> nice stars in the sky. In PovRay 3.1 this all changed. I do not
> understand what I need to do to make the new interior/media combination
> to work like the old halos... Is there a
> conversion rule?
>
> --
> Joost Smits
> jsm### [at] prize nl
My problem in a PovRay 3.1 file:
#include "colors.inc"
#include "textures.inc"
#include "shapes.inc"
#declare Scaling = 1; // Problem: if you vary the scaling the moon changes
size, but also appearance!
// CAMERA POSITION
camera {
right < 1.33, 0, 0 >
up < 0, 1, 0 >
direction < 0, 0, 1 >
location < 0, 0, -8*Scaling>
look_at < 0, 0, 0 >
}
background { color rgb<0.03, 0.17, 0.41> }
light_source{<0,1000,1000>
White
shadowless
}
#declare moon=
sphere { 0, 1
texture{
pigment{rgbt 1}
}
interior{
media{
emission 1
scattering{1,0.1}
intervals 10
samples 1, 15
density{
spherical
color_map{
[0 rgb 0]
[0.3 rgb <0.5,0.5,0.5>]
[1 rgb 1]
}
}
}
}
hollow
}
object {moon
scale Scaling
}
If you change the Scaling, the size of the moon obviously changes, and also
your distance to the moon. Problem now is that the appearance is different.
I want this moon with an aura, a "glow" effect. Yes, I know of the Lens
Flares of Nathan Kopp, but these files generate a magnitude of error
messages in my PovRay 3.1. And, I am sure it is a simple trick to get the
halo effect of PovRay 3.0 in PovRay 3.1 !
I will include my Xmas card from last year. The moon (and harder to see: the
stars) has the effect I am looking for. I only had to define a "star" and
could scale them to for example the moon.
All the best,
Joost Smits
jsm### [at] prizenl
(check also out http://www.prize.nl/jsmits/ and
http://www.prize.nl/jsmits/xmas97/)
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