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"Sven Littkowski" <sve### [at] jamaica-focus com> wrote:
> Planet Earth, latest version. Atmosphere, 3D clouds, 3D continents, lights.
> Question: how to limit lights to only the nightside? Sven
Bah! Posted a reply to your earlier post. Anyway, if you switch to using
Megapov, you can use the 'projection pattern' to put your ambient lights
only on the nightside of the planet. Samples (and Megapov) can be found
here:
http://megapov.inetart.net/samples.html
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"Sven Littkowski" <sve### [at] jamaica-focuscom> wrote in message
news:447b250a@news.povray.org...
> Planet Earth, latest version. Atmosphere, 3D clouds, 3D continents,
> lights. Question: how to limit lights to only the nightside? Sven
>
Try playing with this and adapt it to your needs. It basically uses the
object pattern with a plane oriented to the direction of the sun. Inside
the plane (away from the sun) the Earth light image map is used, outside the
plane (toward the sun) the texture is transparent.
//start
global_settings {
assumed_gamma 1
max_trace_level 10 }
camera{
up y
right x*image_width/image_height
angle 60
location <30,30,30>
look_at 0
}
#local SunLoc= <-500,0,100>; //Sun location
light_source { SunLoc rgb 1 } //Sun
sphere{0 9.9999 //planet below
pigment {rgb <0,0,1>}
finish {ambient 0 diffuse 1}
}
#local Lights=
texture{
pigment {image_map {png "Earth_Lights.png" interpolate 4 map_type 1}}
finish {ambient 4 diffuse 0}
}
#local NoLights=
texture{
pigment {rgbt 1}
finish {ambient 1 diffuse 0}
}
#local OBJ=plane {SunLoc 0}
sphere{0 10
texture {
object{
OBJ
texture{NoLights}
texture{Lights}
}
}
}
//end
-tgq
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Hi.
Well, the 1 MB contains the entire posting. Without text you are close to 1
MB just for the image alone, and the size available for the image shrinks
down accordingly to the amount of text you use in your posting. Simpler:
text and image have to share 1 MB.
Greetings,
Sven
"EagleSun" <nomail@nomail> schrieb im Newsbeitrag
news:web.447b6ea51f1312434fa2c32c0@news.povray.org...
> How did you get the 1 MB limit?!? My limit is set to 700 KB.
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Hi.
For everyone eager to do similar planet renders, you find hi-res Earth
images and bump maps here:
http://visibleearth.nasa.gov/view_set.php?categoryId=2355&p=1
Their entire section is called Blue Marble Next generation, and belongs to
NASA's Jet Propulsion Laboratory.
But besides that, who can give me links to similar hi-res images and bump
maps for the other planets, moons and rings?
Thanks,
Sven
Post a reply to this message
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"Sven Littkowski" <sve### [at] jamaica-focuscom> wrote in message
news:447b250a@news.povray.org...
> Planet Earth, latest version. Atmosphere, 3D clouds, 3D continents,
> lights. Question: how to limit lights to only the nightside? Sven
>
Try playing with this and adapt it to your needs. It basically uses the
object pattern with a plane oriented to the direction of the sun. Inside
the plane (away from the sun) the Earth light image map is used, outside the
plane (toward the sun) the texture is transparent.
//start
global_settings {
assumed_gamma 1
max_trace_level 10 }
camera{
up y
right x*image_width/image_height
angle 60
location <30,30,30>
look_at 0
}
#local SunLoc= <-500,0,100>; //Sun location
light_source { SunLoc rgb 1 } //Sun
sphere{0 9.9999 //planet below
pigment {rgb <0,0,1>}
finish {ambient 0 diffuse 1}
}
#local Lights=
texture{
pigment {image_map {png "Earth_Lights.png" interpolate 4 map_type 1}}
finish {ambient 4 diffuse 0}
}
#local NoLights=
texture{
pigment {rgbt 1}
finish {ambient 1 diffuse 0}
}
#local OBJ=plane {SunLoc 0}
sphere{0 10
texture {
object{
OBJ
texture{NoLights}
texture{Lights}
}
}
}
//end
-tgq
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Hi Trevor,
many thanks for your code. I might just do it and try it out. But it seems,
I found a good solution on my own. Right now I am rendering a 6400x4800
pixels image of the Earth, with improved features.
I made some really good changes to the nightside lights - they are now much
more descent (it really needs such a big resolution to see them - just as in
nature), and they are now only visible at the nightside because of their
ambient value and because of their colors. Was a tricky thing, but it works
now.
As soon as the render has completed, I am going to post that image here.
Greetings,
Sven
"Trevor G Quayle" <Tin### [at] hotmailcom> schrieb im Newsbeitrag
news:447bd2ba$1@news.povray.org...
>
> "Sven Littkowski" <sve### [at] jamaica-focuscom> wrote in message
> news:447b250a@news.povray.org...
>> Planet Earth, latest version. Atmosphere, 3D clouds, 3D continents,
>> lights. Question: how to limit lights to only the nightside? Sven
>>
>
> Try playing with this and adapt it to your needs. It basically uses the
> object pattern with a plane oriented to the direction of the sun. Inside
> the plane (away from the sun) the Earth light image map is used, outside
> the
> plane (toward the sun) the texture is transparent.
>
> //start
> global_settings {
> assumed_gamma 1
> max_trace_level 10 }
>
> camera{
> up y
> right x*image_width/image_height
> angle 60
> location <30,30,30>
> look_at 0
> }
>
> #local SunLoc= <-500,0,100>; //Sun location
>
> light_source { SunLoc rgb 1 } //Sun
>
> sphere{0 9.9999 //planet below
> pigment {rgb <0,0,1>}
> finish {ambient 0 diffuse 1}
> }
>
> #local Lights=
> texture{
> pigment {image_map {png "Earth_Lights.png" interpolate 4 map_type 1}}
> finish {ambient 4 diffuse 0}
> }
>
>
> #local NoLights=
> texture{
> pigment {rgbt 1}
> finish {ambient 1 diffuse 0}
> }
>
>
> #local OBJ=plane {SunLoc 0}
>
> sphere{0 10
> texture {
> object{
> OBJ
> texture{NoLights}
> texture{Lights}
> }
> }
> }
> //end
>
> -tgq
>
>
>
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"Trevor G Quayle" <Tin### [at] hotmailcom> wrote:
Sorry, loks like this gotposted twice. Odd it only showed up once on my
home machine...
-tgq
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Sven Littkowski wrote:
> The reason for that relatively large file size is simply that I wanted to
> check the details exactly, especially the atmosphere. Smaller render sizes
> would make it quite difficult to see the atmosphere at the horizon.
It's probably better to post images that everyone can view on one
screen, ie 1024x768 or less (others might suggest different resolutions).
If you need to show more detail, than a "detail" image would work well -
I mean, a regular sized image (again, 1024x768 or less) but zoomed in to
on the spot you want to focus on (you can accomplish this in POV-Ray by
modifying the "look_at" vector and "angle" value in the camera statement).
...Chambers
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Ehh, err, well... Yes, yes. Okay...
"Trevor G Quayle" <Tin### [at] hotmailcom> schrieb im Newsbeitrag
news:web.447c35c81f1312436c4803960@news.povray.org...
> Sorry, loks like this gotposted twice. Odd it only showed up once on my
> home machine...
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Earth v2.0
A number of improvements I did:
1
the thickness of the atmosphere was reduced by 33% in order to reflect the
real height in relation to the planet
2
the color of the atmosphere is lighter now
3
It is now August on Earth, the winter has gone
4
The clusters of the lights big cities are creating, is now more decent and
not anymore visible at the dayside
5
I am using now the wonderful universe sky map which was created by Nekar
Xenos
I am publishing here four different scenes. If you want me to post the
entire image (JPEG, reduced quality, ca. 650 KB, 6400x4800 pixels) let me
know.
Scenes (introduced by image file names):
a
Northpole - see the atmosphere reflecting the end of a day and getting night
b
City Lights - descent, not individually visible but just increasing the
over-all color of that location
c
Atmosphere - visible at the horizon
d
Clouds - wonderfully three-dimensional and casting their own shades
Greetings,
Sven
Post a reply to this message
Attachments:
Download 'Planet 01 Small a.jpg' (13 KB)
Download 'Planet 01 Small b.jpg' (15 KB)
Download 'Planet 01 Small c.jpg' (26 KB)
Download 'Planet 01 Small d.jpg' (20 KB)
Preview of image 'Planet 01 Small a.jpg'
Preview of image 'Planet 01 Small b.jpg'
Preview of image 'Planet 01 Small c.jpg'
Preview of image 'Planet 01 Small d.jpg'
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