(From the 'everything I need to know about astronomy, I learned
from popular media' section...)

"Regardless of viewing location, the great red spot is ALWAYS
visible when looking at Jupiter."
-- 
Tim Cook
http://empyrean.scifi-fantasy.com

-----BEGIN GEEK CODE BLOCK-----
Version: 3.12
GFA dpu- s: a?-- C++(++++) U P? L E--- W++(+++)>$
N++ o? K- w(+) O? M-(--) V? PS+(+++) PE(--) Y(--)
PGP-(--) t* 5++>+++++ X+ R* tv+ b++(+++) DI
D++(---) G(++) e*>++ h+ !r--- !y--
------END GEEK CODE BLOCK------

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news: 3CBE32ED.E154EA6E@scifi-fantasy.com...
>
> "Regardless of viewing location, the great red spot is ALWAYS
> visible when looking at Jupiter."
> --
LOL, how do you explain that strange behaviour?
When it's facing oposite side it's invisible indeed.
Jupiter's mass isn't huge enough to wrap space frame that way.
Marc

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> Thank you "SY" at news.povray.org for the following post...
>
> "// Mean distance of the sun from Jupiter: 800E+6 km = 8000000E+2
> units
> // Sun's diameter is approx 1.4E6km = 1.4E4 = 14000 units
> // use an area light to simulate the sun
> light_source { <0,0,-8000000> color rgb <1,1,0.85>
>                area_light x*14000, y*14000,3,3 adaptive 1 jitter
>                rotate y*-30 }
> file://light_source { <5000000,0,-8000000> color rgb <1,1,0.85>  }

You are welcome.
If you need some more data, please let me know...

regards
SY

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Very nice scene.

One remark: (beside the HF artefacts) the lighting is IMO inconsistent.
Jupiter is lit from sun "behind" the camera. But looking on the small knob
of europa's surface to the lower left it seems to be lit from Jupiter which
is in FRONT of the cam. Although Jupiter IS bright, the major lighting
should come from the sun.

Jupiter is a picture. What about placing the texture-only jupiter of the the
"jupiter" post in p.b.s-f ? Then you could animate each colour band on it's
own...

good job
regards
SY

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> > "Regardless of viewing location, the great red spot is ALWAYS
> > visible when looking at Jupiter."
> > --
> LOL, how do you explain that strange behaviour?
> When it's facing oposite side it's invisible indeed.
> Jupiter's mass isn't huge enough to wrap space frame that way.
> Marc

due to Jupiter's rotation it is only a matter of time *gg*
regards
SY

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I haven't tried them myself, but I think that the heightfield macros in 3.5
will return a better result than the height_field command. I'm not sure
where they are located, but you could use the search function to find them
in the docs.

 -Shay

Blane Bizzaro <bla### [at] bizzarocreationscom> wrote in message
news:3cbd57ab.334778495@news.povray.org...

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The higher res tip was a good one Shay. The first height field image
was only 600x600px by 8 bit. This new one is 2000x2000 by 24 bit.
Thanks!

--Blane

On Wed, 17 Apr 2002 16:28:19 -0500, "Shay" <sah### [at] simcopartscom> wrote:

>Nice pic, but the jagged look on the near vertical edges of your
>height-field really distract. Consider using a higher resolution
>height-field or using the new height-field macros to improve this.
>
> -Shay
>
>Blane Bizzaro <bla### [at] bizzarocreationscom> wrote in message
>news:3cb### [at] mailpovrayorg...
>
>

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On Wed, 17 Apr 2002 16:28:19 -0500, "Shay" <sah### [at] simcopartscom> wrote:

>Nice pic, but the jagged look on the near vertical edges of your
>height-field really distract. Consider using a higher resolution
>height-field or using the new height-field macros to improve this.
>
> -Shay
>
>Blane Bizzaro <bla### [at] bizzarocreationscom> wrote in message
>news:3cb### [at] mailpovrayorg...
>
>

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The higher res idea worked out pretty good. Thanks for the tip!
--Blane

Shay <sah### [at] simcopartscom> wrote in message
news:3cbec869$1@news.povray.org...
> I haven't tried them myself, but I think that the heightfield macros in
3.5
> will return a better result than the height_field command. I'm not sure
> where they are located, but you could use the search function to find them
> in the docs.
>
>  -Shay
>
> Blane Bizzaro <bla### [at] bizzarocreationscom> wrote in message
> news:3cbd57ab.334778495@news.povray.org...
>
>

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Attachments:
Download 'on_europa2.JPG' (102 KB)

Preview of image 'on_europa2.JPG'

"Blane Bizzaro" <bla### [at] bizzarocreationscom> wrote in
news:3cc05a71@news.povray.org: 

> The higher res idea worked out pretty good. Thanks for the tip!

I think the lighting is still a little wacky.  You might want to try going 
down to one light to the extreme left or right of the scene components 
(well off the screen) and using radiosity to backfill the shadows.

The contrast with the starfield is also way too low; the stars and plane of 
the galaxy should be much dimmer.

I would be interested in seeing the source, BTW.

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