Since the 1970s Gleeson generally made large scale paintings in keeping with the surrealist inscape genre. The works outwardly resemble rocky seascapes, although in detail the coastline's geological features are found to be made of giant molluscs and threatening crustaceans. In keeping with the Freudian principles of surrealism these grotesque, nightmarish compositions symbolise the inner workings of the human mind. Called 'Psychoscapes' by the artist, they show liquid, solid and air coming together and directly allude to the interface between the conscious, subconscious and unconscious mind.