P3D Re: On windows and breaking them

[Marvin Jones <Campfire@xxxxxxxxxxxxxx>]

Message text written by INTERNET:photo-3d@xxxxxxxxxxxxxxxxx
>When I showing slides, they looks like there is window on projection
screen, 
and 3d effect is like it is another room in wall. How can I take slides, 
that there will be objects which pops out of screen ?<

I won't go into great detail here, since most of this is common knowledge
to people posting to P3D. Basically, the screen surface, where the picture
"frame" is located, is called the "window". It is where the two images
merge, one atop the other. As the objects recede from the window they go
further apart on the screen, the right-eye image going further right, and
the left-eye image going left; as they emerge "in front of" the window,
they go further apart in the opposite directions. Most stereo cameras are
fairly fixed as to where in space they place the window--usually 10 or 12
feet in front of the camera. However, if you mount your own slides, you can
adjust this to a certain degree by sliding the film chips closer together
or further apart, thus moving the entire image "closer to" or "further
from" the viewer. Objects very near the window can thus be made to extend
on through it. One important aesthetic note: you need to be careful how you
treat objects in front of the window. If you are photographing a person,
for instance, and you cut them off at the waist and move them "in front of"
the window you'll have a rather eerie "floating dismembered body" effect
which your brain will rebel at, thus harming the stereo effect. You have to
think of the stereo window as a REAL window on the world, and make sure
that you don't bring things through it in ways you could never bring them
through a REAL window in the same position.


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