P3D Window Violations

["Andrea Blair" <asblair@xxxxxxxxxxx>]

>>>>Bob Aldridge wrote: Well, I was appalled at the general standard of 
mounting at NSA Richmond. As far as I can remember, there were only 
about two or three shows where the mounting was accurate. The others 
varied from various grades of window violation down to "shouldn't be 
projected at all"...<<<<

>>>>Bob Maxey then questions: You mentioned that there were Window 
violations. What does a slide have to do to violate the Stereo Window? 
Just curious. For me, I love to violate the window. I love stereo where 
as much as possible comes thorough the Stereo Window, But that is just 
me.<<<<

"Window violation" and "coming through the window" are two different 
things. A window violation occurs when an object that touches the edge 
of the image (or window) is mounted such that it appears to be in front 
of the window, which is unnatural. When something comes through the 
window, it does not touch the edges of the frame (or window) at all and 
appears to jump off the screen into the room, which is perfectly 
acceptable but not an effect enjoyed by everyone (I love it).

Example: Pretend the stereo window is actually a window in a room. You 
are in the room looking out the window. There is a sunflower just 
outside the window with the head hanging through the window (in the 
middle of your point of view) into the room. The flower head is in the 
room (or in front of the window). The stem is outside the room (or 
behind the window). The flower is not touching the edges of the window, 
but the stem disappears behind the window, in effect touching the edge 
of it. When mounting this image as a stereo photograph, the flower can 
come through the window or float in front of the window because it is 
not touching the edge of the frame. The image must be mounted so that 
the stem is at or behind the window (as in our example of the room) so 
it is the near point. If it is mounted with the stem trying to be in 
front of the window, it looks unnatural and is uncomfortable to view.

Does anyone have an example of intentionally violating the window (as 
opposed to coming through the window) for a specific effect. I was told 
at an NSA workshop (rather abruptly) that you don't always mount to 
correct for window violation, i.e. anything touching the edges. Why not?

I must disagee with Bob Aldridge over the NSA programs, though. There 
were more than a couple of programs properly mounted. If anything, I 
would say most of them were comfortable to view and only a few out of 
whack. I know a few of my slides in my macro program didn't project 
well, but I thought most of them were fine. Dave Kesner's cave shots 
were great, IMO.

Andrea Blair
asblair@xxxxxxxxxxx

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