His first period of work is generally considered to contain expressionistic color, with a strong style of "utopian realism" and surreal architecture, like a doomsday scenario. The second period is more abstract style, with the main features of formalism. (https://en.wikipedia.org/wiki/Zdzis%C5%82aw_Beksi%C5%84ski) Despite the grim overtones, Beksiński claimed some of his works were misunderstood; in his opinion, they were rather optimistic or even humorous. For the most part, though, he was adamant that even he did not know the meaning of his artworks and was uninterested in possible interpretations. in keeping with this, he refused to provide titles for any of his drawings or paintings. Before moving to Warsaw in 1977, he burned a selection of his works in his backyard, without leaving any documentation on them. He later claimed that some of those works were "too personal", while others were unsatisfactory, and he didn't want people to see them. (http://imgur.com/gallery/zgknm)