"Bill Pragnell" <bil### [at] hotmailcom> schreef in bericht
news:web.4360929f30852916731f01d10@news.povray.org...
> Just in case any of you were getting bored of ringworlds...
>
> This is a substantial improvement on my previous effort. The ring is
pretty
> much the dimensions stated in the book (and elsewhere here) - 90 million
> miles in radius (although it should be 95 I believe), with 20 shadow
> squares orbiting 12 million miles from the sun. The sun is an area_light 1
> million miles in diameter.
>
> The atmospheric effects are of course the most difficult, and in this
regard
> I cheated somewhat - the haze is merely a ground fog, and the blue sky is
a
> semitransparent sky sphere about a million miles wide, i.e. between the
> camera and the arch.
>
> I think the landscape is of realistic dimensions, but sadly the clouds are
> slightly exaggerated - they are 200 miles in the air, with the camera at
an
> altitude of 100 miles. The reason for this is that I couldn't place the
> camera any lower without some kind of precision artifact creeping into the
> lower half of the image (I'll post an example in a bit).
>
Excellent images, both of them! The atmosphere is much better than in my own
experiments. I am afraid that we have to cheat a bit to get it really right.
In truth, because of the dimensions, the whole *foreground* is a landscape
in itself, almost separate from the background arch.

Thomas

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