The earliest attempts of this technique date back to the French pre-cinema technique
of “Ombro-Cinéma” in the late 1890’s. The animated sequence is created when the complex
image - the Kinegram - is viewed through the acetate (see through sheet ) overlay
with a solid black pattern printed on it. The blank spaces of the pattern being transparent,
as the overlay is slid across the Kinegram, different sections of the Kinegram become
visible... Your brain links this succession of appearing images together, creating
the illusion of motion.