Multiple cameras have to be synchronized. They have take the picture at the same time and just know their locations. If you have that, then you can use mathematics to actually recreate the threedimensional shape of someones face. Narrator snapshot uses those photographs and that dna to create a library of known genetic information. Then the unknown, so far unidentified dna, is crosschecked across that library by computers billions of times a second. The result is a Hightech Prediction of how the unidentified person might look. Its important to remember that the composite is not a photograph. Narrator these composite images were created by snapshot using dna and genetic data from their library. They reveal not just ethnicity, but specific facial features. Its intended to be a description of a person, so its essentially a summary of the prediction information,