If you are interested in some of the thoughts raised by this project you may find some of these links useful. If you have the time the two lectures touch on some of these issues as well as many other very interesting points. I also found working links to a full length version of Stalker (without English subtitles). I would also recommend Geoff Dyer’s Zona: A Book About A Film About A Journey To A Room (2012) which I came across while researching the project. Salmon of Knowledge story, William Butler Yeats, Part 1 of Stalker without subtitles & Part 2 of Stalker without subtitles
Terrence McKenna talks about things under the surface of matter and consciousness. Alan Watts lecture about the nature of consciousness.