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Hi(gh)!
On 04.12.2014 09:09, Thomas de Groot wrote:
> On 3-12-2014 23:40, eticre wrote:
>> Thanks!
>> now I relax for 2000 or 3000 years, clouds and stars are my greatest
>> difficulty.
>> I'm also looking for an approach via isosurface instead of normal
>> using ridged
>> multifractal for terrain elevation, this is my best result
>
> Isosurfaces is an excellent alternative to height_fields indeed although
> slower to render. I have not yet tried it for planets as I first wanted
> the textures to be right, but ridged multifractals at the core would be
> essential. I did a lot of experimentations with isosurface landscapes in
> the past and would need to reactivate my memory (and my documentation) a
> bit :-)
Back in 2010 (as some around here might remember) I rendered a whole
planet ("Ghurghusht"), technically a somewhat Earth-like moon of a gas
giant ("Qais") based on a combination of various isosurface patterns, at
a resolution high enough to get semi-realistic landscapes even from the
viewpoint of a pedestrian standing on the surface, and using Bruno
Cabasson's atmosphere tool. Some views attached here:
1. an entire hemisphere of Ghurghusht
2. a "pedestrian view" of Rathjens Lacus on Ghurghusht
3. a "pedestrian view" of Centlivres Lacus on Ghurghusht
4. a "pedestrian view" of Schmidt Lacus with Sitara Insula (planned
location of Kandabul City)
5. an overflight view of a region at Ghurghusht's equator from about 35
kms height
6. a global physical map of Ghurghusht
7. a physical map of Schmidt Lacus region
and, finally, a link to an animation showing an entire day at Schmidt
Lacus: https://www.youtube.com/watch?v=qyN0zwTW0xU
See you in Khyberspace!
Yadgar
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Attachments:
Download '2010-05-05 ghurghusht, global view centered on substellar point, take 5 (thickness 100, density 0.15, rayleigh factor 0.' (110 KB)
Download '2010-05-05 ghurghusht, rathjens lacus from 1.7 metres, looking east, take 6 (thickness 150, density 0.15, rayleigh facto' (46 KB)
Download '2010-05-05 ghurghusht, centlivres lacus from 1.7 metres, looking north, take 5.jpg' (55 KB)
Download '2010-05-15 ghurghusht, achakzai peninsula and sitara insula from 1.7 m, take 1.jpg' (37 KB)
Download '2010-05-23 ghurghusht, start point for ghurghust equatorial flight from 35,000 metres, looking east, take 1.jpg' (59 KB)
Download '2010-04-01 cylindrical map of ghurghusht, 5 pixels per degree, labelled.png' (1029 KB)
Download '2010-05-15 ghurghusht, context map of schmidt lacus, 450 pixels per degree, take 2, labelled.png' (178 KB)
Preview of image '2010-05-05 ghurghusht, global view centered on substellar point, take 5 (thickness 100, density 0.15, rayleigh factor 0.'
![2010-05-05 ghurghusht, global view centered on substellar point, take 5 (thickness 100, density 0.15, rayleigh factor 0.](/povray.binaries.images/attachment/%3C54802135%40news.povray.org%3E/2010-05-05%20ghurghusht%2C%20global%20view%20centered%20on%20substellar%20point%2C%20take%205%20%28thickness%20100%2C%20density%200.15%2C%20rayleigh%20factor%200.?ttop=413793&toff=300&preview=1)
Preview of image '2010-05-05 ghurghusht, rathjens lacus from 1.7 metres, looking east, take 6 (thickness 150, density 0.15, rayleigh facto'
![2010-05-05 ghurghusht, rathjens lacus from 1.7 metres, looking east, take 6 (thickness 150, density 0.15, rayleigh facto](/povray.binaries.images/attachment/%3C54802135%40news.povray.org%3E/2010-05-05%20ghurghusht%2C%20rathjens%20lacus%20from%201.7%20metres%2C%20looking%20east%2C%20take%206%20%28thickness%20150%2C%20density%200.15%2C%20rayleigh%20facto?ttop=413793&toff=300&preview=1)
Preview of image '2010-05-05 ghurghusht, centlivres lacus from 1.7 metres, looking north, take 5.jpg'
![2010-05-05 ghurghusht, centlivres lacus from 1.7 metres, looking north, take 5.jpg](/povray.binaries.images/attachment/%3C54802135%40news.povray.org%3E/2010-05-05%20ghurghusht%2C%20centlivres%20lacus%20from%201.7%20metres%2C%20looking%20north%2C%20take%205.jpg?ttop=413793&toff=300&preview=1)
Preview of image '2010-05-15 ghurghusht, achakzai peninsula and sitara insula from 1.7 m, take 1.jpg'
![2010-05-15 ghurghusht, achakzai peninsula and sitara insula from 1.7 m, take 1.jpg](/povray.binaries.images/attachment/%3C54802135%40news.povray.org%3E/2010-05-15%20ghurghusht%2C%20achakzai%20peninsula%20and%20sitara%20insula%20from%201.7%20m%2C%20take%201.jpg?ttop=413793&toff=300&preview=1)
Preview of image '2010-05-23 ghurghusht, start point for ghurghust equatorial flight from 35,000 metres, looking east, take 1.jpg'
![2010-05-23 ghurghusht, start point for ghurghust equatorial flight from 35,000 metres, looking east, take 1.jpg](/povray.binaries.images/attachment/%3C54802135%40news.povray.org%3E/2010-05-23%20ghurghusht%2C%20start%20point%20for%20ghurghust%20equatorial%20flight%20from%2035%2C000%20metres%2C%20looking%20east%2C%20take%201.jpg?ttop=413793&toff=300&preview=1)
Preview of image '2010-04-01 cylindrical map of ghurghusht, 5 pixels per degree, labelled.png'
![2010-04-01 cylindrical map of ghurghusht, 5 pixels per degree, labelled.png](/povray.binaries.images/attachment/%3C54802135%40news.povray.org%3E/2010-04-01%20cylindrical%20map%20of%20ghurghusht%2C%205%20pixels%20per%20degree%2C%20labelled.png?ttop=413793&toff=300&preview=1)
Preview of image '2010-05-15 ghurghusht, context map of schmidt lacus, 450 pixels per degree, take 2, labelled.png'
![2010-05-15 ghurghusht, context map of schmidt lacus, 450 pixels per degree, take 2, labelled.png](/povray.binaries.images/attachment/%3C54802135%40news.povray.org%3E/2010-05-15%20ghurghusht%2C%20context%20map%20of%20schmidt%20lacus%2C%20450%20pixels%20per%20degree%2C%20take%202%2C%20labelled.png?ttop=413793&toff=300&preview=1)
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Yes indeed!
Thomas
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On Thu, 04 Dec 2014 00:40:22 +0200, eticre <eti### [at] tin it> wrote:
> Thomas de Groot <tho### [at] degroot org> wrote:
>> On 2-12-2014 23:39, eticre wrote:
>> > hallo everybody
>> > I am absolutely newbie with povray, this is what I have realized in
>> the last
>> > 4billions years of life.
>> >
>> > I have post in scene-file the code
>> >
>> >
>> >
>> Excellent work! I can hardly name you a newbie, even less an /absolute/
>> newbie. Your textures are very well made.
>>
>> Interestingly, I have been working for some time now (less than 4
>> billion years) on exactly the same thing but with some differences. My
>> latitudinal approach is similar to yours; however, I am using
>> height_fields for the topography and the texture is thus also altitude
>> dependent. I attach an example of the state of the art.
>> For the background I have used Chris Colefax's galaxy macros, which are
>> in need of some upgrade ;-)
>> http://reocities.com/SiliconValley/lakes/1434/galaxy.html
>>
>> For the height_fields I use a little application called PlanetGenesis
>> http://planetgenesis.sourceforge.net/ and the clouds come from the Nasa
>> http://visibleearth.nasa.gov/view_cat.php?categoryID=1484&p=3
>>
>> Thomas
>
> Thanks!
> now I relax for 2000 or 3000 years, clouds and stars are my greatest
> difficulty.
> I'm also looking for an approach via isosurface instead of normal
You could also take a look at Jaime's LightSys Space Demo scene. The moon
is an isosurface which I found very helpful as a starting point for
creating an earth-like planet
--
-Nekar Xenos-
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On 4-12-2014 20:24, Nekar Xenos wrote:
> You could also take a look at Jaime's LightSys Space Demo scene. The
> moon is an isosurface which I found very helpful as a starting point for
> creating an earth-like planet
>
I forgot that one... :-( Thanks for the reminder!
Thomas
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"eticre" <eti### [at] tin it> wrote:
> hallo everybody
> I am absolutely newbie with povray, this is what I have realized in the last
> 4billions years of life.
As a god I'm much faster - it needed only 4 years to get the media effect I
wanted.
Nice textures...
Norbert Kern
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Attachments:
Download 'media_earth.jpg' (411 KB)
Preview of image 'media_earth.jpg'
![media_earth.jpg](/povray.binaries.images/attachment/%3Cweb.54820d4dbaef4c9bc7d5457a0%40news.povray.org%3E/media_earth.jpg?ttop=413793&toff=300&preview=1)
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"He is THE NORBERT. He determines which media absorb and which emit!" *
"He determines which photons stay and which will go."
(* Only available through participating mediums)
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Attachments:
Download 'bow2norbert.gif' (32 KB)
Preview of image 'bow2norbert.gif'
![bow2norbert.gif](/povray.binaries.images/attachment/%3Cweb.54823c9bbaef4c9b5e7df57c0%40news.povray.org%3E/bow2norbert.gif?ttop=413793&toff=300&preview=1)
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"Norbert Kern" <nor### [at] t-online de> wrote:
> As a god I'm much faster - it needed only 4 years to get the media effect I
> wanted.
It took you more than 6 days? What kind of god are you? ;-)
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Nice Work!
Thomas
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"Cousin Ricky" <rickysttATyahooDOTcom> wrote:
> "Norbert Kern" <nor### [at] t-online de> wrote:
> It took you more than 6 days? What kind of god are you? ;-)
Obviously incompetent and - compared to the 600+ lines of code alone for the
earth texture of eticre - extremely lazy too...
Here the code:
#version 3.7;
global_settings {
assumed_gamma 2.2
max_trace_level 125
noise_generator 2
radiosity {
pretrace_start 0.08
pretrace_end 0.04
count 30
nearest_count 1
error_bound 2
low_error_factor 0.5
recursion_limit 1
gray_threshold 0
minimum_reuse 0.015
brightness 1
adc_bailout 0.005
normal on
media off
}
}
#declare cam_loc = <3,2,-6>;
#declare lookat = <0,1,0>;
camera {
location cam_loc
right x*image_width/image_height
up y
look_at lookat
angle 33
}
light_source {<1000,1000,-300>, 3}
#declare ET1 =
texture {
pigment {
image_map {
png "earth_map"
gamma 2.2
map_type 1
interpolate 2
filter all 0.98
}
}
normal {bumps 0.003 scale 0.05}
finish {
conserve_energy
diffuse 0.3
ambient 0
reflection {0.8 fresnel on}
}
}
#declare ET2 =
texture {
pigment {
image_map {
png "earth_map"
gamma 2.2
map_type 1
interpolate 2
}
}
normal {
bump_map {
jpeg "earth_bumpk2"
map_type 1
interpolate 2
}
bump_size 10
}
finish {
diffuse 0.5
ambient 0
specular 0.3
roughness 0.03
}
}
sphere {
<0,0,0>, 1
texture {
image_pattern {
jpeg "earth_speck"
map_type 1
interpolate 2
}
texture_map {
[0.33 ET2]
[0.33 ET1]
}
}
interior {
ior 2.1
media {
//emission 0.2
scattering {1 1.6 extinction 0.1}
//scattering {2 0.5 extinction 1}
intervals 1
samples 150
method 3
}
}
hollow
double_illuminate
rotate -140*y
rotate -20*x
translate <0.5,1,0>
}
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eticre wrote on 03/12/2014 20.29:
> Hi Paolo
> Italia?
>
> I live near Varese.
>
;-)
Near Brescia, not so far!
Paolo
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