1993 I built 2 different cameras out of wood, one with 11 pinholes for sheets of film 18 x 24 cm and another one with 19 pinholes for the whole length of a 35mm-film.
With both cameras I learned a lot of how to work with the camera on the final composition of overlaying images on one negativ.
check out in the menu on the left
Gorges du Regalon
and the Lost memories