Once you’ve got the look down, all you have to do is walk into an octagonal chamber, with cameras and all sides, stand on the stripy rug and keep still. Step 1 lasts as long as it take for a shutter to open and close.
Step 2, however, takes many hours: a 3D printer builds up the model layer by layer, colour and all, until you’re left with a rueful little voodoo doll. Pins not included. Photograph: Linda Nylind/Guardian