capturing geometry. if we also want to capture color, then we use pho photogrammetry. we process them into a 3-d model and mesh the two together. we have the geometry from the laser data and we have the color from the photogrammetry. >> you brought a couple of props and examples you can show us. let me see what you brought with you. >> i've got two lincoln life masks for you. this is a life mask that was taken of lincoln just before he became president. he was president-elect. this is somebody putting plaster on his face and taking an impressi impression. he looks in good shape. look what the war did to him. this is the life cast that was