Barrier-grid animation, also known as a kinegram or picket-fen | Did you know?
Barrier-grid animation, also known as a kinegram or picket-fence animation is an animation effect created by moving a striped transparent overlay across an interlaced image.
A grid of thin transparent lines in a mask is passed over a composite graphic image, to give an illusion of movement. The grid of transparent lines was static in a viewing frame, and a strip of the composites was spooled behind it.
