A good primer on the study of ancient art and how it relates to the Shroud indicating a historical record in art back to the 6th century.
http://www.shroudstory.com/art.htm

A good primer on why the Shroud is not the work of an artist
http://www.shroudstory.com/notofhand.htm

Is the Shroud a Painting? World reknown artist Isabel Piczek tell why the Shroud can not be the work of an artist. Lots of images in this article.
http://www.shroud.com/piczek.htm

"Alice In Wonderland and the Shroud of Turin" by Isabel Piczek This is another superb article comparing the field of art with the Shroud image. It contains 54 images so be patient as it loads.
http://www.shroud.com/piczek2.htm

Another superb contribution from Isabel, a study of the negative image on the Shroud and the concept of negativity through the ages.
http://www.shroud.com/piczek3.htm

How do we know the Shroud is not a painting? The answer comes from Dr. Gil Lavoie.
http://www.shroudofjesus.com/page2.html