On Jan 21, 5:26*am, mm wrote:
OT? *How did they do the double image on the Patti Duke show?

Does anyone know how they showed two of her at the same time?
I'm watching reruns now on an 19" tv now, from one foot away, and I
can't see line or anything. *Sometimes they just show the back of the
head of a double for the second one, but other times they show both of
them. *Nothing shows and and I don't think they had green-screen
electronic technology then. *Was there a physical or photographic
method of separating one moving image from its background and
superimposing it on another?

Look to see if there is ever any overlap. If the two images are always
left screen/right screen with a gap between, then it is likely simple
split screen. If it is done well, the only indication is an occasional
shadow cut off at the 'dodged' [fuzzed] boundry. Early 'blue screen'
had problems with the edges so it was usually fairly obvious.

Neil S.