>
> Now, for a view from its surface!
>
> Thomas

Here's what I have so far...needs lots of work -- blurred in Photoshop to make
it look a little better.

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"Ed Sweet" <esw### [at] gmailcom> wrote:
> >
> > Now, for a view from its surface!
> >
> > Thomas
>
> Here's what I have so far...needs lots of work -- blurred in Photoshop to make
> it look a little better.

A better try, using a (scaled tiny) heightfield for the foreground, and
Photoshop color adjustment to compensate for the yellowing from the relatively
deep air.

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On 11-11-2012 16:08, Ed Sweet wrote:
> "Ed Sweet" <esw### [at] gmailcom> wrote:
>>>
>>> Now, for a view from its surface!
>>>
>>> Thomas
>>
>> Here's what I have so far...needs lots of work -- blurred in Photoshop to make
>> it look a little better.
>
> A better try, using a (scaled tiny) heightfield for the foreground, and
> Photoshop color adjustment to compensate for the yellowing from the relatively
> deep air.
>

I truly like this! Next stage would be to use a POV media instead of 
photoshop ;-) but this gives an excellent idea.

Thomas

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Thomas de Groot <tho### [at] degrootorg> wrote:
> On 11-11-2012 16:08, Ed Sweet wrote:
> > "Ed Sweet" <esw### [at] gmailcom> wrote:
> >>>
> >>> Now, for a view from its surface!
> >>>
> >>> Thomas
> >>
> >> Here's what I have so far...needs lots of work -- blurred in Photoshop to make
> >> it look a little better.
> >
> > A better try, using a (scaled tiny) heightfield for the foreground, and
> > Photoshop color adjustment to compensate for the yellowing from the relatively
> > deep air.
> >
>
> I truly like this! Next stage would be to use a POV media instead of
> photoshop ;-) but this gives an excellent idea.
>
> Thomas

This is just POV media, no color correction in Photoshop.  Note the yellowing...

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Thomas de Groot <tho### [at] degrootorg> wrote:
> On 11-11-2012 16:08, Ed Sweet wrote:
> > "Ed Sweet" <esw### [at] gmailcom> wrote:
> >>>
> >>> Now, for a view from its surface!
> >>>
> >>> Thomas
> >>
> >> Here's what I have so far...needs lots of work -- blurred in Photoshop to make
> >> it look a little better.
> >
> > A better try, using a (scaled tiny) heightfield for the foreground, and
> > Photoshop color adjustment to compensate for the yellowing from the relatively
> > deep air.
> >
>
> I truly like this! Next stage would be to use a POV media instead of
> photoshop ;-) but this gives an excellent idea.
>
> Thomas

Here it is with "autotone" in Photoshop.

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"Ed Sweet" <esw### [at] gmailcom> wrote:
> Thomas de Groot <tho### [at] degrootorg> wrote:
> > On 11-11-2012 16:08, Ed Sweet wrote:
> > > "Ed Sweet" <esw### [at] gmailcom> wrote:
> > >>>
> > >>> Now, for a view from its surface!
> > >>>
> > >>> Thomas
> > >>
> > >> Here's what I have so far...needs lots of work -- blurred in Photoshop to make
> > >> it look a little better.
> > >
> > > A better try, using a (scaled tiny) heightfield for the foreground, and
> > > Photoshop color adjustment to compensate for the yellowing from the relatively
> > > deep air.
> > >
> >
> > I truly like this! Next stage would be to use a POV media instead of
> > photoshop ;-) but this gives an excellent idea.
> >
> > Thomas
>
> Here it is with "autotone" in Photoshop.

I actually placed the heightfield inside the media to render.  Heightfield was
scaled

scale < 0.05, 0.003, 0.05>

and placed on the surface of the torus (radius = 5, minor radius = 0.2).

Might try to use a Trace() command to populate the surface with desert bushes or
something.

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> Thomas de Groot <tho### [at] degrootorg> wrote:
>> On 11-11-2012 16:08, Ed Sweet wrote:
>>> "Ed Sweet" <esw### [at] gmailcom> wrote:
>>>>>
>>>>> Now, for a view from its surface!
>>>>>
>>>>> Thomas
>>>>
>>>> Here's what I have so far...needs lots of work -- blurred in Photoshop to make
>>>> it look a little better.
>>>
>>> A better try, using a (scaled tiny) heightfield for the foreground, and
>>> Photoshop color adjustment to compensate for the yellowing from the relatively
>>> deep air.
>>>
>>
>> I truly like this! Next stage would be to use a POV media instead of
>> photoshop ;-) but this gives an excellent idea.
>>
>> Thomas
>
> This is just POV media, no color correction in Photoshop.  Note the yellowing...
>

Very good twilight time image. In my eyes, this one is more convincing 
than the previous one.



Alain

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Am 11.11.2012 17:31, schrieb Ed Sweet:

> Here it is with "autotone" in Photoshop.

Yuck. For the twilight, I really do prefer the "raw" version.

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On 11-11-2012 17:30, Ed Sweet wrote:

> This is just POV media, no color correction in Photoshop.  Note the yellowing...
>

This is the one I much prefer.

Thomas

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Le 10/11/2012 14:32, Ed Sweet nous fit lire :
> Toroidal planet -- spins so fast it's not a sphere or an ellipsoid, but a torus,
> like "J.P. Boyd's "Moonbow" story in Analog.
> 
> Yes, I know that toroidal planets have been shown to be only "meta stable" in
> numerical simulations, and that any perturbation would cause the torus to clump
> up and collapse into a ring of debris or something...so you would need some kind
> of dynamic stabilization to keep it stable...probably not worth the trouble...
> 
> but it looks cool...
> 
> Modeled entirely in POVRAY.
> 

I wonder about the gravity field on the planet itself, just disregarding
the speed of rotation. Seems to me that on the outer radius, the gravity
is strong. On the inner radius, to avoid getting attracted to the sky,
it is weaker and push some constraints between the major & minor radius
(so that the ground is stronger than the sky part).
But on the upper/bottom side(circle) of the torus, it seems that, if the
ground is just along the torus, the direction of a free water surface
would not be parallel to the ground. Wouldn't there be a kind of
desert/cliff making the transition on the small circle between both
region ? would it be some desert or waterfall ?

What about the clouds ? Isn't the atmosphere somehow more extended
inside than outside of the torus ?
What about the difference on the wildlife & flora due to the various
strength of gravity ? (and the cubic/square rule)
Is the daily rotation around the main axis (which might means a 6-month
day if the rotation axis is not aligned with the plane of revolution, or
an ever dim inside-band if they are (well, maybe the shadow cast by the
other side is not large enough to hide the sun, so: umbra, penumbra or
just a bit less light, according to the relative apparent radius of the
sun/minor radius of the planet)

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