P3D Re Stereo Window Demo, LLL for DDD

[abram klooswyk <abram.klooswyk@xxxxxx>]

George Themelis:
>For our next club meeting I am scheduled for a demonstration of
>the stereo window.  I plan to cut open the top of an RBT mount
>and shift the rails while the slide is sitting inside my
>Brackett Dissolver stereo projector. 

A similar demonstration has been given by Dalgoutte, in
England,
I believe in the 1950s. 

In Paris I once saw a very convincing demonstration by the 
famous Guy Ventouillac, who had made several copies of one nice 
stereopair, mounted in different ways, which showed how a fine 
shot can be ruined by violating the window. If memory serves, 
he also showed the slides with transparent strips at the sides 
which had to be masked off. This was especially appropriate in 
France, since the Verascopes have no built-in stereowindow.

In my opinion a demonstration slide should not have too fine
details, like grass in a backyard :-) or small leaves, but
rather show a limited number of objects at different distances.

LLL for DDD... Yes, it seems to be difficult for many people to 
place themselves before a window and _just look_ what they can 
see with either eye.

Peter Davis wrote (23 Feb 2000):
>Somebody could make a very effective Web page showing the same 
>pair mounted with different windows.  Has anyone already done 
>something like this?  I'd love to see it.

Larry Berlin has (had?) animated gifs on his site (for 
cross-eyed and parallel viewing) in which one of the "chips"
moves, changing the place of the window with respect to the
scene. 
(I have downloaded this part of his site more than two years 
ago, but today I couldn't find a working link to the
animations. 
http://3dzine.simplenet.com/features/pwindow.html   and 
http://3dzine.simplenet.com/features/xwindow.html
I have saved xwindow1.gif and pwindow1.gif in Oct 1997)

The animation is a nice idea, however I believe that the shot
chosen for it was not the best possible example, it shows a
creek with grassy borders, probably nice in a viewer, but with
the limited resolution of web images a shot with stronger 3D
effects and coarser details would do better, in my opinion. 
Can you show another example, Larry?