Yes,
there were many processes like this (it certainly wasn’t
an original idea of mine). John Joly was perhaps the first to put it
into practice
in the 1890s. But McDonough of Chicago was not far behind. And later
regular
screen processes include the Finlay and Johnson color plates. Many of
these
processes involve separate taking and viewing screens. This allowed for
the
inventor to use different colors. For example, yellow could replace
green in
the taking screen so that it wouldn’t block as much light. Or lighter
less saturated colors could be used (again for speed considerations, as
well as
color rendition in the final plate). In all of these the screens could
be mixed
and matched. That was one of the main advantages of this system—you
could
make as many as you want. National Geographic published color
photographs using
the Finlay process (I believe in the 1930s) and of course a one off
process
like the autochrome would have made this impossible (OK—duplication of
autochromes was done, but it wasn’t pretty).
I’ve
never actually tried it, but there have been other
Photoshop autochrome instructions published such as this one: http://www.photoshopsupport.com/tutorials/or/autochrome-photo-effect.html
Gawain
Weaver