yeah, we used to use one of these in the school photo biz as one of our set-ups. Generally used for seniors, though sometimes we would open it up to other classes.

On 9/6/11 5:33 PM, Darren Addy wrote:
This was done over 30 years ago (before green screen) in a lot of
portrait studios with a special screen and projector. The screen was
different from the usual as it was made up of thousands to tiny black
glass balls that would reflect the projected light straight back at
the camera (which had to be perfectly aligned with the projector and
the perfectly perpendicular screen. The camera actually shot through a
beam-splitter and the projector (aimed at the ceiling) bounced 90
degrees off the beam splitter to the screen.

Scene Machine was one brand:
http://www.ebay.com/itm/Scene-Machine-Virtual-Backgrounds-/260834241515

If not perfectly aligned you would get a dark line around at least
part of your subject. The main problem was that the studio lighting
would rarely match the lighting on the background image and so would
look unrealistic to the eye (which is quite good at detecting when
something is not quite right). It shares this problem with green
screen backgrounds of today.

It was a fad that really didn't last too long (except that I see that
Scene Machine is still in business, so somebody must still be buying).

Darren Addy
Kearney, Nebraska



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