I remember somebody in an IRTC round from a few years ago
using a similar trick to produce a stereo-gram pair from
within POV - no post processing.  He/She had the whole setup
to produce a stereo pair from one scene and one camera with
two sets of reflective surfaces.  It was pretty cool.
But that's been a LONG time ago...maybe 1998 or so...
The topic may have been something like "Optical Illusions".
Sorry, but I don't have time to hunt it down!

Emory

Robbert wrote:
> 
> The only other way I can think of is to render the other scene(s) separately
> and use a plane that is texture mapped with the image(s) of the rendered
> scenes in front of the old.  The only problem below that I can see is that
> lights in both scenes will affect each other not to mention that using the
> mirror will require you to 'mirror' the other scene AND make sure the mirror
> is placed properly so that when the new scene is left and you remove the
> mirror the two images match 1-1.  This could be difficult to do.  Mind you
> the above won't be easy either if you are intending to have both animated.
> It'll mean accurately placing the plane and texture map in front of the
> camera so that when you complete the transition you don't get a pop or
> anything when going completely to the new scene.
> 
> "Mike Williams" <mik### [at] econymdemoncouk> wrote in message
> news:uff### [at] econymdemoncouk...
> > Wasn't it Arne Kleinophorst who wrote:
> > >Hi folks
> > >Anybody has an idea how to make some kind of camera fade-over with
> > >povray. I mean directly with pov within a single *.pov-file without an
> > >external movie-program.
> >
> > You might try placing a mirror in front of the camera, and having one
> > scene in front of the mirror and one behind it. Then change the mirror
> > from reflective to transparent.
> >
> > --
> > Mike Williams
> > Gentleman of Leisure

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