 Close-ups of the apparatus in action show that the pencil's movements appear oddly purposeful, as if a consciousness were driving the mark-making; but in shots from afar, the mechanical process is clear.His work "A Line Describing the Sun" (2010) is a two-channel video that documents Lamson melting the desert floor with a Fresnel lens into a line of black glass.He follows the path of the sun moves through the sky, hence the chosen title.