P3D Re: Stereo Window Demonstration

[Mark Damish <mdamish@xxxxxxx>]

Bruce,
  The problem with moving the masks in projection, is that
you are also moving the location of the projected window
to in front of, on, and behind the projection surface.
  When you instead, move the chips, you ARE moving the
near/far points, which is in fact what you want to
demonstrate, relative to a fixed window.
...Mark

> Moving chips in and out behind a mask is OK, but the demonstration I like
> better is to use prints and move the masks in and out - thereby actually
> moving the *window*, which is the point, and not the scene, which
> technically is not the same thing.  Remember that moving chips in and out
> is changing the convergences of everything in the scene, as well as the
> infinity separation, and creates distortions and potential divergence
> issues.  Of course with slides that is the only option, because the
> distance between mask apertures is fixed.