I knew of these but never bothered to check them out. After going through some of my Blurays I remembered I had 2 movies that were using the old anaglyph technology.
Friday the 13th P3 and Coraline. Coraline was Green and Red which DO NOT work. Friday the 13th P3 used the Blue & Red which work with the old Civil War pictures.
Are interesting and think everyone should take a look.
A few are motion pictures which was also used back then very primitive but still cool to see.
Kick back pop on some old paper glasses with Blue & Red lenses and see Civil War in 3-D.
See how they made this process “3-D” happen back in the 1800’s