This is what is known as perspective, and it is a swindle.

Schwitters worked in several genres and media including Dada Constructivism Surrealism poetry sound painting sculpture graphic design typography and what came to be known as installation art. He is most famous for his collages called Merz Pictures. Kurt Hermann Eduard Karl Julius Schwitters (20 June 1887 – 8 January 1948) was a German painter who was born in Hanover Germany.