Hi, not sure what to call this, but it's one of my favorites.

The Saturn was done by POV-Ray, and the planet with life was done by
Terragen, hope it's ok to mix images like that.

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Pretty, but they're going to crash into each other pretty soon.

 - Slime
 [ http://www.slimeland.com/ ]

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"Slime" <fak### [at] emailaddress> schreef in bericht
news:42fedf28@news.povray.org...
> Pretty, but they're going to crash into each other pretty soon.
>
Torn apart, before crashing into each other, probably.
Pretty indeed, but I have some misgivings about the absence of a terminator
on the blue planet... or what? There is something strange in the whole
setting of sun+ringplanet+blueplanet that gives me the feeling that they do
not belong together...

Thomas

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EagleSun wrote:
> Hi, not sure what to call this, but it's one of my favorites.
> 
> The Saturn was done by POV-Ray, and the planet with life was done by
> Terragen, hope it's ok to mix images like that.

Hmm - does Terragen support accurately curved planet surfaces?  The 
curvature in your scene seems minimal so i am not sure.

I any case if the horizon in nearly straight like here you are already 
in the upper atmosphere - the sky would not be that clear and the 
atmosphere transit at the horizon would appear broader.

Christoph

-- 
POV-Ray tutorials, include files, Landscape of the week:
http://www.tu-bs.de/~y0013390/ (Last updated 24 Jul. 2005)
MegaPOV with mechanics simulation: http://megapov.inetart.net/

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High!

EagleSun wrote:

> The Saturn was done by POV-Ray, and the planet with life was done by
> Terragen, hope it's ok to mix images like that.

If you mean o.k. in terms of scientific accuracy - yes, it is, in fact, 
gas giants in Earth-like orbits whose moons (if large enough) could 
support life already have been discovered, for example:
http://www.jtwinc.com/planettour.asp?StarCatID=normal&PlanetID=210

But, in such an orbit, a gas giant probably would look different than 
Saturn - less hazy because of its higher temperature, and with white 
clouds of water droplets/water ice crystals rather than brown-yellowish 
frozen hydrocarbons; towards the equator the latitudinally banded clouds 
gradually would give way to deep blue cloudless atmosphere.

Still, the planet would probably have a more or less developed ring 
system - as with all gas giants in the Solar System!

See you in Khyberspace!

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> If you mean o.k. in terms of scientific accuracy - yes, it is, in fact,
> gas giants in Earth-like orbits whose moons (if large enough) could
> support life already have been discovered, for example:
> http://www.jtwinc.com/planettour.asp?StarCatID=normal&PlanetID=210

OW this is absolutely amazing!  A web site giving descriptions of all the
known and suspected planets.  I started checking out the site and was very
surprised to find this:
"http://www.jtwinc.com/planettour.asp?StarCatID=normal&PlanetID=14" which
looks too similar to my work, the 16 Cygni B B.

And I meant, "OK as in mixing POV-Ray with another rendering software?"  I'm
sure the "scientific" accuracy is impossible to determine.

>
> But, in such an orbit, a gas giant probably would look different than
> Saturn - less hazy because of its higher temperature, and with white
> clouds of water droplets/water ice crystals rather than brown-yellowish
> frozen hydrocarbons; towards the equator the latitudinally banded clouds
> gradually would give way to deep blue cloudless atmosphere.

I saw some descriptions on gas planets being more hazy when they are far
away and very bright when being close to the sun.  On earth, I think it is
a bit different... very clear on cold days and hazy on hot days...
(Yesterday we went to Galveston, and it was hot and hazy.)  I think water
acts oppositely in many ways.

So... this might be the description of my work....

This ringed planet, with its satellite, makes an eliptical orbit around the
sun.  Life flourishes on the satellite, and as the planet and satellite
approach perihelion, water from below the surface begins to swell, causing
the atmosphere to be hazy and cloudy, the atmosphere may become slightly
thicker as well.  At perihelion, a complete overcast protects the surface
from searing heat, which may last only a few weeks.  Afterward, the
planet/satellite drift further and further away from the sun.  Water falls
out of the atmosphere, usually in the form of rain.  Upon approaching
aphelion, the life satellite moves toward hibernation; snow and ice may
cover the surface.  Hibernation can last several months during the Aphelion
cycle.

From: Thomas de Groot

>> Pretty, but they're going to crash into each other pretty soon.
>>
>Torn apart, before crashing into each other, probably.
>Pretty indeed, but I have some misgivings about the absence of a terminator
>on the blue planet... or what? There is something strange in the whole
>setting of sun+ringplanet+blueplanet that gives me the feeling that they do
>not belong together...

I thought about that... the "Roc"? force... uhm.. the force that sounds like
"Rock", describes how a planet behaves when it approaches a bigger
planet... such as breaking apart.  And I'm wondering if Io is borderline to
breaking up, being so close to Jupiter.  Thomas, what is "absence of a
terminator on the blue planet"?

From: Christoph Hormann

> Hmm - does Terragen support accurately curved planet surfaces?  The
> curvature in your scene seems minimal so i am not sure.

Uhm... sortof.... there's an optional switch that doesn't work that great.
Terragen has its limitations, and I tried to maximize what I'm able to
do... I did set all the settings equal, such as pitch, bank, heading....
relative heading of the sun on Terragen matches the heading of the sun in
POV-Ray.  The Terragen has 2 main layers, each rendered in 2 different
versions of Terragen.  I did the clouds in v 0.8.11, and the surface in
0.9.19.  I think the planet size is set to the size of earth.  And meter
point spacing is about 200 meters per data point.  I also matched the Zoom
magnification and the perspective type, and simulated the coordinates to
match.  Anything that still doesn't seem right after that, is Terragen's
fault.  However, I noticed 3 things that make it hard to tell if it's
right...  1: shadow angle of Saturn (yes I used the Saturn map), 2: tilt of
Saturn's rings, 3: and the shadow of clouds cast onto the planet.

I'm hoping some day to do the planet surface in POV-Ray.

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"EagleSun" <nomail@nomail> schreef in bericht
news:web.42ffc8a8eba068608342980a0@news.povray.org...
>
> From: Thomas de Groot
>
> >> Pretty, but they're going to crash into each other pretty soon.
> >>
> >Torn apart, before crashing into each other, probably.
> >Pretty indeed, but I have some misgivings about the absence of a
terminator
> >on the blue planet... or what? There is something strange in the whole
> >setting of sun+ringplanet+blueplanet that gives me the feeling that they
do
> >not belong together...
>
> I thought about that... the "Roc"? force... uhm.. the force that sounds
like
> "Rock", describes how a planet behaves when it approaches a bigger
> planet... such as breaking apart.  And I'm wondering if Io is borderline
to
> breaking up, being so close to Jupiter.  Thomas, what is "absence of a
> terminator on the blue planet"?
>
Oh, sorry! The terminator is the boundary zone between day and night, and I
wondered if it would not be visible here. But I may be wrong because it
depends on the position of the sun, which you can deduce from the media
shadows of the clouds!
In any case, it is a beautiful picture and I would like to live on such a
planet....

Thomas

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"Thomas de Groot" <t.d### [at] internlnet> wrote:
> "Slime" <fak### [at] emailaddress> schreef in bericht
> news:42fedf28@news.povray.org...
> > Pretty, but they're going to crash into each other pretty soon.
> >
> Torn apart, before crashing into each other, probably.

If Titan was earthlike, you could probably take a photo like that. Saturn
should have an angular diameter of approx 6 degrees as viewed from Titan,
so that would have to be a long-angle view, but still...

As for a terminator, it would be out of shot to the left, to judge from
Saturn's.

Of course, the issue of a body as small and as far from the sun as Titan
evolving an earth-like biosphere is beyond my Googling for today! :)

Bill

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High!

Christoph Hormann wrote:

> I any case if the horizon in nearly straight like here you are already 
> in the upper atmosphere - the sky would not be that clear 

Do you mean "more mottled by clouds and density irregularities"?

> and the 
> atmosphere transit at the horizon would appear broader.

Perhaps it is a planet significantly larger than Earth, yet still 
terrestrial, with a diameter of, lets say 17,000 kms - then by the 
higher gravity, the atmosphere would be more compressed towards the 
solid surface!

See you in Khyberspace!

Yadgar

Now playing: Baklava (Ihre Kinder)

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> Hmm - does Terragen support accurately curved planet surfaces?  The
> curvature in your scene seems minimal so i am not sure.

There is a Tutorial at Terradreams how to create curved planets:
http://www.terradreams.de/All/Tutorials/SpaceTut/Index.php

Bye Grosch

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