Changes to the original include the romance between Gladys and David and “some censorship restrictions that kept Dorian's unspeakable acts offscreen.”  In the book, the picture alters in response to Dorian's "good deed", but the alteration is ugly, reflecting his cynicism and self-serving motivation. He stabs the painting to destroy his conscience and eliminate the evidence.
Modifications were made to the original story, which included a romance between Gladys and David and “some editing restrictions that prevented Dorian's unacceptable actions from being shown.”  In the book, the image changes in response to Dorian's "good deed", but the alteration is ugly, revealing his cynicism and self-serving nature. He stabs the painting to eliminate any guilt or proof.