Back again.
The viewpoints do all show a white sphere on top of a red cylinder here. No
problems.  Besides this, I wondered about the placement of keywords within
your camera statement.  'angle' being removed makes a difference, as does
also the order of 'orthographic' and I always put it before the 'location'
and 'look_at' (very first thing in camera), and seems to be correct there.
With yours it is much different and apparently not based any longer on up
and right keywords either, maybe even not functional at all placed at the
end like that, not sure.

Bob

omniVERSE <inv### [at] aolcom> wrote in message
news:3832b40b@news.povray.org...
> I think you have the camera too close for one thing, the orthographic type
> really always should have the 'up' and 'right' keywords in there to
specify
> the scene dimensions. Of course the default should make for a 4/3 wide by
1
> high view, so the objects not appearing whole or not at all must be
related
> to the close proximity is going to be my guess anyway, without actually
> rendering and testing.
> Well, I just can't resist trying it out.  Tried it.  Nothing wrong with
any
> of the four viewpoints.  What version POV-you have there?  I used 3.1g for
> Win.
>
> Bob
>
> ingo <ing### [at] homenl> wrote in message
> news:8E8### [at] 21212011381...
> > In the scene below, try all four locations. In the first all is
> > ok, the second gives a black image. The third is ok again and
> > the fourth is missing the sphere.
> > Why does this happen?
> >
> > light_source{<500,500,-500> rgb 1}
> > camera{
> >    location  < 0.0, 0.0, -0.47>
> >    file://location  < 0.0, 0.0, -0.46>
> >    file://location  < 0.0, 0.1, -0.46>
> >    file://location  < 0.0, 0.1, -0.45>
> >    look_at 0
> >    angle 90
> >    orthographic
> > }
> > sphere{0.2*y,0.2 pigment{rgb 1}}
> > cylinder{0,-0.5*y,0.2 pigment{rgb<1,0,0>}}
> >
> > Ingo
> >
> > --
> > Photography: http://members.home.nl/ingoogni/
> > Pov-Ray    : http://members.home.nl/seed7/
>
>

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