Unlike what we have usually done in the past, the puppet image for this semester is put together using PhotoShop (as oppose to ray-tracing it ourselves using a ray tracer written by one of the former TAs). As a result, there are certain artifacts in the image that do not look quite right. In particular, the shadows are all wrong! (They are merely a hack that the TA did in PhotoShop.) Nevertheless, the resulting image is well-received by the students.