Begotten is the creation myth brought to life, the story of no less than the violent death of God and the (re)birth of nature on a barren earth.
Making use of low quality film to give the images a pretentious artistic look (and hide the low budget make-up and practical effects) doesn't work if there is no good plot to hold them together. It's a hard to watch film, because of the low quality, not because of the imagery. Boring through and through.