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Hi everyone,
some time ago someone I do not remember the name posted images of a black
pearl with diamonds. It gave me the envy to try to texture a black pearl,
here is the result so far. It doesn't really looks like a black pearl, but
I do not have big ideas to improve it.
The pearl is made of 8 concentric, almost black, transparent spheres with
normal, high diffraction, and different indices.
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Attachments:
Download 'pn4.jpg' (53 KB)
Preview of image 'pn4.jpg'
![pn4.jpg](/povray.binaries.images/attachment/%3Cweb.4388a39e502baa44d3d39f040%40news.povray.org%3E/pn4.jpg?ttop=443866&toff=4850&preview=1)
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> Hi everyone,
> some time ago someone I do not remember the name posted images of a black
> pearl with diamonds. It gave me the envy to try to texture a black pearl,
> here is the result so far. It doesn't really looks like a black pearl, but
> I do not have big ideas to improve it.
> The pearl is made of 8 concentric, almost black, transparent spheres with
> normal, high diffraction, and different indices.
looks pretty good ...
looks as if you didn't use just a sphere ...
but have some irregularities in the shape ...
which seems more realistic.
the original black pearl thread is here:
http://news.povray.org/povray.binaries.images/thread/%3C4357addf%241%40news.povray.org%3E/?ttop=220778&toff=50
which contains some of the texture code experiments.
post your texture code?
-ts-
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"ts" <nomail@nomail> wrote:
> looks as if you didn't use just a sphere ...
that's the effect of normals.
> post your texture code?
#declare nc = 8 ; // number of levels
#declare ec =.003 ; // thickness of the levels
#declare ds = 12 ; // dispersion samples
#declare rd=seed(1) ;
#macro M_PerleNoire(n,decal) material {
texture {
pigment {rgbt <.2,.2,.2,.8>}
finish {
ambient .2 diffuse .4
specular .23 roughness .04
phong .2 phong_size 350
brilliance 2
}
normal {
bumps .3+rand(rd)*.1
scale .4+rand(rd)*.1
translate decal
}
}
interior {
ior 1+2*n/nc
dispersion 10
dispersion_samples ds
}
}#end
#declare Perle = union {
#local ip=0 ;
#local dec = 0 ;
#while(ip<nc)
#local ip=ip+1 ;
#local dec=dec+<rand(rd),rand(rd),rand(rd)>*ec*2 ;
sphere {0 1-ec*(nc-ip) M_PerleNoire(ip,dec)}
#end
}
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Looks good! Think some photons would look nice too focusing the light from
the ring! Good job!
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