i have lowered the clouds and made them whiter.  i have reduced the
atmosphere height and made it lighter overall.  the dark side is now
dark.  i'm wondering why the top and bottom center of the atmosphere is
well lit, but the right center isn't.  would that be a scattering
problem or an absorption problem?  or color intensity?  i used Darcy's
tutorial for the atmosphere.  at the scale i'm using (7200), i had to
change the first scattering density entry to [rgbf<.1,.1,.1,1>] or it
wouldn't show up. the address of Darcy's tutorial can be found as a
responce to my previous post.

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Attachments:
Download 'spherehfb.jpg' (106 KB)

Preview of image 'spherehfb.jpg'

okay, i checked some other light angles and the atmosphere looks fine in
the middle right.  so i think i'll just choose my light sourse
judiciously.

ryan constantine wrote:
> 
> i have lowered the clouds and made them whiter.  i have reduced the
> atmosphere height and made it lighter overall.  the dark side is now
> dark.  i'm wondering why the top and bottom center of the atmosphere is
> well lit, but the right center isn't.  would that be a scattering
> problem or an absorption problem?  or color intensity?  i used Darcy's
> tutorial for the atmosphere.  at the scale i'm using (7200), i had to
> change the first scattering density entry to [rgbf<.1,.1,.1,1>] or it
> wouldn't show up. the address of Darcy's tutorial can be found as a
> responce to my previous post.
> 
>   ------------------------------------------------------------------------
>  [Image]

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Realistically the dark side should be pitch black, but this is a great
improvement. Besides, artistic license...

--
David Fontaine     <dav### [at] faricynet>     ICQ 55354965
Please visit my website: http://www.faricy.net/~davidf/

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David Fontaine wrote:
> 
> Realistically the dark side should be pitch black, but this is a great
> improvement. Besides, artistic license...

i was thinking about that and i don't think it is completely black. 
almost, sure, but not all.  consider this: when there's no moon out or
it's a new moon, and you are in the middle of nowhere, you can still see
enough to walk around and not kill yourself by falling off a cliff or
something.  Plus, artistic license like you said.  i'm still going to
try and tweak it though.  i'm trying out a circular area light with
orient activated as well as parallel.  the size and distance are that of
our sun.  we'll see how it turns out.  i think i read somewhere that pov
and megapov don't like really big and really small numbers in the same
scene.  so, if i have the planet and the sun with realistic numbers, how
can i add spaceships of realistic size?

> 
> --
> David Fontaine     <dav### [at] faricynet>     ICQ 55354965
> Please visit my website: http://www.faricy.net/~davidf/

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ryan constantine wrote in message <393F0EA4.153F7337@yahoo.com>...
>  i think i read somewhere that pov
>and megapov don't like really big and really small numbers in the same
>scene.  so, if i have the planet and the sun with realistic numbers, how
>can i add spaceships of realistic size?


Simply define 1 POV unit as being 1 mile, or 10 miles, or .1 mile, or
whatever makes things work.  Try to keep all measurements between 1000000000
and .000000001.

Mark

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"ryan constantine" <rco### [at] yahoocom> wrote in message
news:393EFEDC.5CE34E9A@yahoo.com...
| okay, i checked some other light angles and the atmosphere looks fine in
| the middle right.  so i think i'll just choose my light sourse
| judiciously.
|
| ryan constantine wrote:
| >
| > i have lowered the clouds and made them whiter.  i have reduced the
| > atmosphere height and made it lighter overall.  the dark side is now
| > dark.  i'm wondering why the top and bottom center of the atmosphere is
| > well lit, but the right center isn't.  would that be a scattering
| > problem or an absorption problem?  or color intensity?

Seemed more an illusion, the difference in overall brightness of the regions
might make the top and bottom appear brighter than it actually is.  You say it
changed according to light angles but if it's scattering type 1 there
shouldn't be a change in a uniformly shaped media.  Type 2, 3,4 or 5 can.
To me the planet and clouds are still dark on the lit side.  Clouds being
about a rgb 0.5 average.

Bob

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On Wed, 07 Jun 2000 20:10:28 -0700 ryan constantine
<rco### [at] yahoocom> wrote:

>if i have the planet and the sun with realistic numbers, how
>can i add spaceships of realistic size?

  The same way the effect is achieved on television and the movies -
only a portion of the planet surface is shown, as a backdrop for the
ships. In this way, proportion is maintained.

-- 
Alan - ako### [at] povrayorg - a k o n g <at> p o v r a y <dot> o r g
http://www.povray.org - Home of the Persistence of Vision Ray Tracer

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I agree with Bob that what you saw before was just an illusion due to the
contrast between the atmosphere and the planet. Where the planet is fading
away, the atmosphere looks brighter, when compared to where the planet is
well lit.

Darcy

"ryan constantine" <rco### [at] yahoocom> wrote in message
news:393EFEDC.5CE34E9A@yahoo.com...
> okay, i checked some other light angles and the atmosphere looks fine in
> the middle right.  so i think i'll just choose my light sourse
> judiciously.
>
> ryan constantine wrote:
> >
> > i have lowered the clouds and made them whiter.  i have reduced the
> > atmosphere height and made it lighter overall.  the dark side is now
> > dark.  i'm wondering why the top and bottom center of the atmosphere is
> > well lit, but the right center isn't.  would that be a scattering
> > problem or an absorption problem?  or color intensity?  i used Darcy's
> > tutorial for the atmosphere.  at the scale i'm using (7200), i had to
> > change the first scattering density entry to [rgbf<.1,.1,.1,1>] or it
> > wouldn't show up. the address of Darcy's tutorial can be found as a
> > responce to my previous post.

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