Drew Struzan is an acclaimed movie poster artist having amassed unparalleled talent combined with advertising art on some of the greatest films ever made. He has certainly influenced my work and created a great sense of anticipation for movies as a child. I like that the film makers also chose to explore how the movie poster industry has unfortunately decayed over time.
For more great art documentary recommendations, I compiled a list here: http://www.jonodoiron.blogspot.ca/2013/01/art-documentaries.html
