Dissolve Projection

[P3D Bob Aldridge <bob.aldridge@xxxxxx>]

Michael Kersenbrock wrote:

->Another distinction between "reality" and the 3D projected
->images is that in real life things are a bit more continuous.
->Slides, on the other hand, "jerks" one from one visual scenario
->to another relatively suddenly (or from darkness to scenario
->and back again).  This may wear on one's natural visual apparatus,
->particularly for one who isn't practiced at it.

We have a member of the Stereoscopic Society who believes that the
blackout between slides helps to allow the viewer to cleanse the
previous image from their mind before viewing the next.

->At NSA '97 (despite my being thought a nut-case) I voiced that I
->thought that some of the slide-to-slide dissolves on the Brackett
->projector didn't work for me because the adjacent slide images
->didn't fit together (for lack of a better way to describe it).  Vast
->majority were good/fine/nice.  Jon even did some image "dancing" 
->between two images that worked very nice because the images were
->"compatible" with each other.  However *some*, particularly with
->disolve, did seem to "bug me".  I wasn't dying, but one of those 
->momentary "huh?" sorts of feelings.

And another of our member, who swears by dissolve AV projection states
vehemently that one should mount religeously "to infinity" to ensure
smooth transitions - and I can see his point! There are enough strange
things going on with divergence sans focussing etc, that causing the
viewer to change convergence when looking at two things that are both at
infinity, should be avoided. Of course, this means you are likely to
introduce some ghosting...

Personally, I like to have continuous images on the screen, but I tend
to use fast dissolves to avoid the uncomfortable "third images" so
beloved of our flatty colleagues.

->So maybe there is a visual reality boundary (VRB) source of 
->headache.  :-)
-> 
->Mike K.
-> 
->P.S. - The last Cascade Stereoscopic Club's meeting had it's 
->       projection done with a Brackett Disolver.  Kewl! 
-> 

Can't remember how good the Bracket dissolve perameters are - the Dual
Hawk that I tend to use for manual projection had a rather strange
dissolve pattern until I serviced the rheostat! I guess this is why the
programable dissolve controllers have different patterns for different
projectors. Whatever, dissolve projection allows me to put on a better
show - IMHO.

Bob Aldridge
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