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It might be a good time to bring up a new wish list addition for having the
camera able to shift field of view according to distance. Sound okay?
Bob
"Spider" <spi### [at] bahnhof se> wrote in message
news:387A2DB2.EE5D32FE@bahnhof.se...
> Andrea Ryan wrote:
> >
> > Hello,
> > I am trying to make a picture of the Earth and the Moon. One POV unit
> > equals one mile. The Moon is something like 250000 miles from the
> > origin and it is nothing but a tiny, gray speck. When the camera is
> > near the Moon, the Earth looks small too. Is there a limit on how far
> > apart objects can be? I might have one POV unit equal to 100 or 1000
> > miles.
> > Brendan Ryan
>
>
> About a year ago we were discussing the same with other astronomical
> things, and the conclusin was that it was harder to get them scaled
> correctly, correct lens data and cheats with eye and perception than it
> was to cheat and make the moon look apperantly correct. Sorry to say
> this, but use the artistic licence(TM) to get the best results.
>
>
> --
> file://Spider -- [ spider@bahnhof.se ]-[ http://darkmere.wanfear.com/ ]
> And the devil in black dress watches over
> My guardian angel walks away
> Life is short and love is always over in the morning
> Black wind come carry me far away
> --"Sisters of Mercy" -- "Temple Of Love"
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I need the correct dimensions but they should be correct since I got them from a
book.
Brendan Ryan
Margus Ramst wrote:
> There is a limit, but 250,000 units should be well within that limit. You might
> have the simensions of the objects wrong. I too have had the problem you
> describe, the Moon seeming too small at correct distance & size, but 'a tiny
> gray speck' seems a bit extreme. Unless you have a very large camera angle.
> Do you absolutely _need_ to have the correct dimensions?
>
> Margus
>
> Andrea Ryan wrote:
> >
> > Hello,
> > I am trying to make a picture of the Earth and the Moon. One POV unit
> > equals one mile. The Moon is something like 250000 miles from the
> > origin and it is nothing but a tiny, gray speck. When the camera is
> > near the Moon, the Earth looks small too. Is there a limit on how far
> > apart objects can be? I might have one POV unit equal to 100 or 1000
> > miles.
> > Brendan Ryan
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Here's my camera statement. The Moon looks about right when it's viewed
from the surface of the Earth.
camera {
location <0,0,3963>
look_at <0,0,255500>
angle 4
}
Brendan Ryan
Mike Williams wrote:
> Wasn't it Andrea Ryan who wrote:
> >Hello,
> >I am trying to make a picture of the Earth and the Moon. One POV unit
> >equals one mile. The Moon is something like 250000 miles from the
> >origin and it is nothing but a tiny, gray speck. When the camera is
> >near the Moon, the Earth looks small too. Is there a limit on how far
> >apart objects can be? I might have one POV unit equal to 100 or 1000
> >miles.
>
> There's a sort of optical illusion that makes the Moon seem to be much
> larger than it is. If you take a photo that includes the moon with, say,
> a 50mm lens, the picture looks like this:-
>
> +-------------------------------------------+
> | |
> | |
> | |
> | |
> | |
> | |
> | |
> | O |
> | |
> | |
> | |
> | |
> | |
> | |
> | |
> +-------------------------------------------+
>
> A POVray image that uses the default camera angle will look similar. To
> get a decent looking photo of the Moon you need to use quite a long
> telephoto lens, so in POVray, that would mean setting your camera to
> something like this.
>
> camera {location < 0, 0, -250000>look_at <0,0,0> angle 2}
>
> --
> Mike Williams + #
> Gentleman of Leisure
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Andrea Ryan wrote:
> Hello,
> I am trying to make a picture of the Earth and the Moon. One POV unit
> equals one mile. The Moon is something like 250000 miles from the
> origin and it is nothing but a tiny, gray speck. When the camera is
> near the Moon, the Earth looks small too. Is there a limit on how far
> apart objects can be? I might have one POV unit equal to 100 or 1000
> miles.
Long time ago on images I posted renderings of the space elevartor
with the ring around the earth. I have earth and moon in it. It appears
realistic to me. Try searching under fountain for the threads.
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Angle 6 might be better.
Brendan Ryan
Andrea Ryan wrote:
> Here's my camera statement. The Moon looks about right when it's viewed
> from the surface of the Earth.
>
> camera {
> location <0,0,3963>
> look_at <0,0,255500>
> angle 4
> }
>
> Brendan Ryan
>
> Mike Williams wrote:
>
> > Wasn't it Andrea Ryan who wrote:
> > >Hello,
> > >I am trying to make a picture of the Earth and the Moon. One POV unit
> > >equals one mile. The Moon is something like 250000 miles from the
> > >origin and it is nothing but a tiny, gray speck. When the camera is
> > >near the Moon, the Earth looks small too. Is there a limit on how far
> > >apart objects can be? I might have one POV unit equal to 100 or 1000
> > >miles.
> >
> > There's a sort of optical illusion that makes the Moon seem to be much
> > larger than it is. If you take a photo that includes the moon with, say,
> > a 50mm lens, the picture looks like this:-
> >
> > +-------------------------------------------+
> > | |
> > | |
> > | |
> > | |
> > | |
> > | |
> > | |
> > | O |
> > | |
> > | |
> > | |
> > | |
> > | |
> > | |
> > | |
> > +-------------------------------------------+
> >
> > A POVray image that uses the default camera angle will look similar. To
> > get a decent looking photo of the Moon you need to use quite a long
> > telephoto lens, so in POVray, that would mean setting your camera to
> > something like this.
> >
> > camera {location < 0, 0, -250000>look_at <0,0,0> angle 2}
> >
> > --
> > Mike Williams + #
> > Gentleman of Leisure
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