There’s a new exhibit at the Norman Rockwell Museum consisting of source photographs the artist staged for his paintings.

http://www.nrm.org/2009/10/opening-of-landmark-exhibition-exploring-a-new-body-of-rockwell-imagery-nov-7th/

NPR has an interesting report questioning the implications of these photos being released and the line between artist and illustrator. For me the line is always at least partially blurred.

http://www.npr.org/blogs/pictureshow/2009/11/rockwell.html

http://www.artchive.com/artchive/W/warhol.html