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A little bit closer to home than galaxies, and a transparent
excuse for playing with six recently released moon maps :)
See http://www.jpl.nasa.gov/news/news.php?feature=4403
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Attachments:
Download 'saturns_greetings.png' (394 KB)
Preview of image 'saturns_greetings.png'
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Hi(gh)!
Am 22.12.2014 um 02:35 schrieb Christian Froeschlin:
> A little bit closer to home than galaxies, and a transparent
> excuse for playing with six recently released moon maps :)
>
> See http://www.jpl.nasa.gov/news/news.php?feature=4403
They are much better now... but the saturation is somewhat enhanced, or,
to be more precise, also non-visible light intensities have been taken
into account for calculation.
Inspired by these new maps, I started to re-activate my POVSolar project
(as some of you might remember, back in 2009 I worked my way from the
Sun and the inner planets halfway into the Saturn system) and thus now
continued with Mimas, the smallest spherical moon of Saturn.
To get a more realistic view, I reduced the overall saturation (-50 in
GIMP) and upped brightness (+80 in GIMP) and contrast (+25 in GIMP) to
match Mimas' high albedo, which is about 0.93.
I also did a fly-around animation of Mimas, showing Saturn and its ring
system in the background - soon to be published on YouTube.
There also now detailed shape models (ASCII tables) of the six
medium-sized icy moons of Saturn exist - in the futured, I want to
replace the simple spheres with spherical mesh2s generated from them!
See you in Khyberspace!
Yadgar
Now playing: Firth Of Fifth (Genesis)
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Attachments:
Download 'povsolar000.png' (226 KB)
Download 'povsolar216.png' (154 KB)
Preview of image 'povsolar000.png'
Preview of image 'povsolar216.png'
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=?windows-1252?Q?=22J=F6rg_=5C=22Yadgar=5C=22_Bleimann=22?= <yaz### [at] gmx de>
wrote:
> Hi(gh)!
>
> Am 22.12.2014 um 02:35 schrieb Christian Froeschlin:
> > A little bit closer to home than galaxies, and a transparent
> > excuse for playing with six recently released moon maps :)
> >
> > See http://www.jpl.nasa.gov/news/news.php?feature=4403
>
> They are much better now... but the saturation is somewhat enhanced, or,
> to be more precise, also non-visible light intensities have been taken
> into account for calculation.
>
> Inspired by these new maps, I started to re-activate my POVSolar project
> (as some of you might remember, back in 2009 I worked my way from the
> Sun and the inner planets halfway into the Saturn system) and thus now
> continued with Mimas, the smallest spherical moon of Saturn.
>
> To get a more realistic view, I reduced the overall saturation (-50 in
> GIMP) and upped brightness (+80 in GIMP) and contrast (+25 in GIMP) to
> match Mimas' high albedo, which is about 0.93.
>
> I also did a fly-around animation of Mimas, showing Saturn and its ring
> system in the background - soon to be published on YouTube.
>
> There also now detailed shape models (ASCII tables) of the six
> medium-sized icy moons of Saturn exist - in the futured, I want to
> replace the simple spheres with spherical mesh2s generated from them!
>
> See you in Khyberspace!
>
> Yadgar
>
> Now playing: Firth Of Fifth (Genesis)
not really on-topic, but have you seen this?
http://www.ciclops.org/
the painting would make a nice povray project.
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Hi(gh)!
Am 31.12.2014 um 19:19 schrieb green:
> not really on-topic, but have you seen this?
> http://www.ciclops.org/
> the painting would make a nice povray project.
Yes, I heard about those icy mountain chains (in parts, they must be
several kilometers tall!) at the edges of some of Saturn's rings some
years ago, and it would be truly intriguing to include them in a later
version of POVSolar... but first I have to complete the Solar System at
a rather basic level!
See you in Khyberspace!
Yadgar
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On 31-12-2014 19:19, green wrote:
> not really on-topic, but have you seen this?
> http://www.ciclops.org/
> the painting would make a nice povray project.
>
Yes, that would certainly be interesting to do. My only reservation is
about the /distance/ between the individual particles, also in the
so-called mountains. I have the feeling that the shown painting is not
correct. It is all a matter of scale of course.
--
Thomas
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Thomas de Groot <tho### [at] degrootorg> wrote:
> On 31-12-2014 19:19, green wrote:
> > not really on-topic, but have you seen this?
> > http://www.ciclops.org/
> > the painting would make a nice povray project.
> >
>
> Yes, that would certainly be interesting to do. My only reservation is
> about the /distance/ between the individual particles, also in the
> so-called mountains. I have the feeling that the shown painting is not
> correct. It is all a matter of scale of course.
>
> --
> Thomas
i have concerns about the discrete streams and their coloration. the
artist had excellent sources and the properties of the ring particles
are not well known, so artistic license should be accepted. i do think
ray tracing would be physically instructive, altho this scene may be a
killing field for subsurface scattering.
i am intrigued by the possibilities in an actual flat megastructure
next to the tall 'mountains', an inconceivable sight!
if you have not seen it, similarly exciting and spectacular vistas
are in erik wernquist's short video _wanderers_; wonderful!
http://vimeo.com/108650530
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On 1-1-2015 17:22, green wrote:
> Thomas de Groot <tho### [at] degrootorg> wrote:
>> On 31-12-2014 19:19, green wrote:
>>> not really on-topic, but have you seen this?
>>> http://www.ciclops.org/
>>> the painting would make a nice povray project.
>>>
>>
>> Yes, that would certainly be interesting to do. My only reservation is
>> about the /distance/ between the individual particles, also in the
>> so-called mountains. I have the feeling that the shown painting is not
>> correct. It is all a matter of scale of course.
>>
>> --
>> Thomas
> i have concerns about the discrete streams and their coloration. the
> artist had excellent sources and the properties of the ring particles
> are not well known, so artistic license should be accepted. i do think
> ray tracing would be physically instructive, altho this scene may be a
> killing field for subsurface scattering.
My main concern is with the substance of the 'mountains' I studied the
different photographs available and I am baffled. From them and from the
descriptions given, my best guess is that they consist of more or less
dense accumulations of ring particles, temporarily thrown out of the
ring orbit. Individual gravitational forces interacting between the
particles form the ephemeral 'mountains'. I think they should be
rendered not as dense structures but as flimsy, half-transparent,
'spikes'. Maybe I shall have a go at them for the current TC-RTC
Challenge 'Complex'. Seems a good exercise. :-)
> i am intrigued by the possibilities in an actual flat megastructure
> next to the tall 'mountains', an inconceivable sight!
Yes!
> if you have not seen it, similarly exciting and spectacular vistas
> are in erik wernquist's short video _wanderers_; wonderful!
> http://vimeo.com/108650530
Yes, that is a very inspirational video!
--
Thomas
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