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"mr.art" <mr.### [at] gci net> wrote in message news:3894D38A.F6F3E4D4@gci.net...
| Actually, I had never seen the earth with highlights,
It does of course. Any elevation above ground from your standing height (or
lower?) to orbital height (and higher?) can show it. Look into your own heads
shadow at noon and you'll likely see it's brighter immediately around the shadow
edges, from an airplane shows it very well, and there are numerous Earth photos
which show it too. This particular image with the sunlight direction off-center
may be a different story though. Anyway I've never seen that much before, it
implies a lot of roughness, or *small-scale angular faceting, on the surface. I
want to try that type of highlighting myself now :-)
*blinn microfacets?
Bob
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The real problem for me is to get the highlighting on the "water"
areas only. Any ideas? The whole thing is an isosurface with a nice
pigment map from NASA to overlay the shape. The isosurface is defined by
a
grayscale image from NASA.
Bob Hughes wrote:
>
> "mr.art" <mr.### [at] gcinet> wrote in message news:3894D38A.F6F3E4D4@gci.net...
> | Actually, I had never seen the earth with highlights,
>
> It does of course. Any elevation above ground from your standing height (or
> lower?) to orbital height (and higher?) can show it. Look into your own heads
> shadow at noon and you'll likely see it's brighter immediately around the shadow
> edges, from an airplane shows it very well, and there are numerous Earth photos
> which show it too. This particular image with the sunlight direction off-center
> may be a different story though. Anyway I've never seen that much before, it
> implies a lot of roughness, or *small-scale angular faceting, on the surface. I
> want to try that type of highlighting myself now :-)
>
> *blinn microfacets?
>
> Bob
--
Mr. Art
"Often the appearance of reality is more important
than the reality of the appearance."
Bill DeWitt 2000
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Sorry, my humor sensors have been giving false
readings lately so I have stopped relying on
them. From what I can tell, the works that we
say make up about 7% of what we are trying to
communicate. Body language, tone of voice, facial
expression and such make up so much more. If we
could see and hear what others are saying here,
I think that there might be far less flaming done
here. Well, then again, maybe not.
David Fontaine wrote:
>
> Twas a joke.
>
> "mr.art" wrote:
>
> > Earth in general. Just a close up to see if the
> > mountains really did cast shadows in the dawn
> > terminator.
> >
> > David Fontaine wrote:
> > >
> > > > Just thought I would see what it could do
> > > > to one of my favorite places.
> > >
> > > Your favorite place is the southwestern United States? :-)
>
> --
> Homepage: http://www.faricy.net/~davidf/
> ___ ______________________________
> | \ |_ <dav### [at] faricynet>
> |_/avid |ontaine <ICQ 55354965>
--
Mr. Art
"Often the appearance of reality is more important
than the reality of the appearance."
Bill DeWitt 2000
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// Um, yeah... the pov script now:
#version unofficial MegaPov 0.4;
camera {location <3,3,-3> look_at 0}
light_source {<15,15,-15>,1}
sphere
{0,1 hollow
pigment
{
gradient y
color_map { [0.0 color rgb <.3,.65,.75>*.75] [1.0 color rgb
<.125,.35,.8>*.5] }
}
finish {ambient 1}
scale 50
}
plane
{
y, -1.5 hollow
material {
texture {
pigment {checker color rgb 1 color rgb 0 scale 1.25}
finish {ambient .25 diffuse 1}
}
interior {fade_distance 3 fade_power 2}
texture {
pigment {gradient z color_map {
[0,.125 color rgbt 1 color rgbt 1]
[.125,.25 color rgbt <0,0,0,1> color rgbt <0,0,0,.5>]
[.25,.75 color rgbt <0,0,0,.5> color rgbt 0]
} sine_wave scale <1,1,27>*2.5 translate 60*z}
}
rotate -2.5*x
clipped_by {box {-50,50}}
}
#declare IPa=
texture
{
image_pattern { tga "belinda.tga" use_alpha}
texture_map
{
[0 pigment {rgb <1,0,0>} ]
[.5 pigment {rgb <0,1,0>} ]
[1 pigment {rgb <0,0,1>} ]
} translate -.5 scale 1.5
} // pigment {rgb 1}
#declare IPb=
texture
{
image_pattern { tga "belinda.tga" use_alpha}
texture_map
{
[0 pigment {rgb <1,0,0>} ]
[.5 pigment {rgb <0,1,0>} ]
[1 pigment {rgb <0,0,1>} ]
} translate -.5 scale 1.5
} // pigment {rgb 1}
cone {-.75*y,1.5,.75*y,0
texture {
image_pattern { tga "belinda.tga" use_alpha}
texture_map {
[0 IPa]
[1 IPb]
}}
translate <1,0,1>
}
object {
sphere { <-.5,0,0>, 1 texture {pigment {rgb .15}
finish {ambient .15 diffuse .7 phong .4 phong_size 234 specular .6 roughness
.025 reflection .8 reflection_exponent .8
metallic .7 brilliance 3 }} }
}
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