I have been looking at your panorama and I feel each time more drawn into 
it. As a geologist, I am fascinated by those volcanic dykes that criss-cross 
the landscape. The absence of vegetation suggests to me a world from the 
Precambrian, lets say a billion years ago, before the emergence of life. I 
am not sure however, if then the sky was blue as there was no oxygen yet in 
the atmosphere. And the haze strongly suggests a carbon dioxide-rich 
atmosphere.

Thomas

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450966eb$1@news.povray.org...
> I have been looking at your panorama and I feel each time more drawn into
> it. As a geologist, I am fascinated by those volcanic dykes that
criss-cross
> the landscape. The absence of vegetation suggests to me a world from the
> Precambrian, lets say a billion years ago, before the emergence of life. I
> am not sure however, if then the sky was blue as there was no oxygen yet
in
> the atmosphere. And the haze strongly suggests a carbon dioxide-rich
> atmosphere.
>
> Thomas

You mean no life on dry land but may be a lot underwater... blue algae and
cyanobacteriae could be at work for ages yet
But it is true that the atmosphere was not so oxygenated than after the
carbonifer era which fixed most of the carbon dioxid we are releasing back
now.
If I'm wrong, please correct me :-)
Marc

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news: web.45094c45bf995f33c0bad8570@news.povray.org...
>
> Hey, thanks Marc! And yeah the clouds are media :)
Yes indeed but procedural density or density files?

Marc

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"Marc" <jac### [at] wanadoofr> schreef in bericht 
news:45096da5$1@news.povray.org...
>
>
> You mean no life on dry land but may be a lot underwater... blue algae and
> cyanobacteriae could be at work for ages yet
> But it is true that the atmosphere was not so oxygenated than after the
> carbonifer era which fixed most of the carbon dioxid we are releasing back
> now.
> If I'm wrong, please correct me :-)
>

Yes, I stand corrected. Of course, I mean no life on dry ground! I was swept 
along by the rethorics!
Indeed, the emergence of land plants was the main factor for the atmospheric 
oxygen and a substantial lowering of carbon dioxide.

Thomas

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"Thomas de Groot" <t.d### [at] internlnet> wrote:
> I have been looking at your panorama and I feel each time more drawn into
> it. As a geologist, I am fascinated by those volcanic dykes that criss-cross
> the landscape. The absence of vegetation suggests to me a world from the
> Precambrian, lets say a billion years ago, before the emergence of life. I
> am not sure however, if then the sky was blue as there was no oxygen yet in
> the atmosphere. And the haze strongly suggests a carbon dioxide-rich
> atmosphere.
>
> Thomas

I think that's a great complement.. I think I've stumbled upon a good set of
world parameters this time around. I keep finding little subscenes that I
want to zoom into and render some more (working on one now, actually!) I
thought about the blue sky issue too, but hey I'll take some of that
artistic license ;)

I wonder about taking this Tierra code further, like perhaps a more
physically based simulation, that takes into account glaciers, and stuff...
its got me thinkin ;)

George

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"Marc" <jac### [at] wanadoofr> wrote:

> news: web.45094c45bf995f33c0bad8570@news.povray.org...
> >
> > Hey, thanks Marc! And yeah the clouds are media :)
> Yes indeed but procedural density or density files?
>
> Marc

I'm not sure, but have a look at the Project Tierra source:

http://www.ignorancia.org/en/index.php?page=Project_Tierra

Regards,
George

http://www.gammaburst.net

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news: web.450b2bf8bf995f33c0bad8570@news.povray.org...
> "Marc" <jac### [at] wanadoofr> wrote:

> I'm not sure, but have a look at the Project Tierra source:
>
> http://www.ignorancia.org/en/index.php?page=Project_Tierra
>
> Regards,
> George
>
> http://www.gammaburst.net
>
Oh spheres with object_pattern,
clever

Marc

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