We looked at some films by animator Alexandre Alexeieff who invented the technique of pinscreen animation. This technique is basically another form of stop motion animation. At first, I didn’t really understand how the technique worked to create images, and so I watched a documentary on the process. The pinscreen is large and consists of a white background that had thousands of small holes. In each hole there is a cylindrical pin that sits flush in the hole or can be pushes out from the backside (fig. 1).

Figure 1 
Figure 2
The actual images seem to be created using the shadows that the pins cast on the white background, once pushed out (fig. 2). In the video, someone demonstrates how the animator would achieve the shades of black, gray, middle gray, light grey, and then white. Depending on the angle of the light source, when all pins are pushed out to their max, the shadows overlap and cover all the white, creating a black surface. When the pins are pushed in just a bit, more of the white shows and looking from far away, the mixing of the black shadows and white background create mid-gray (fig. 3). And so, the pins can be placed at different lengths to experiment with the tones created (fig. 4).

Figure 3 
Figure 4
In my next post, I will discuss how the technique is applied to some animations by Alexeieff.
Documentary: https://www.youtube.com/watch?v=N4u-C8kyUeA
Sydney McPherson
