A photograph of someone with back drops and studio lights
They depicted the figure mainly by observing human anatomy and having their model stand for them for hours for perfectly depict it.
Answer: This is called Surrealism.
Explanation: What is surrealism? Surrealism is pushing the boundaries of standard Impressionism to create wacky, unrealistic, and uncanny pieces to express ones self.
“Fantasy” was included to not only shock the viewers, but also challenge societal norms of art. Other reasons are simple, to express yourself, or to improve beyond portraits.
A straight line as other lines such as dashed, jagged, wiggly show rough surfaces or textures.