In this regard, Classical Realism differs from the art movements of Photorealism and Hyperrealism. Early 21st century Hyperrealism was founded on the aesthetic principles of Photorealism. His works are associated with Magic realism, Social realism, Photorealism and Surrealism. Rendering styles that combine photorealism with non-photorealism are known as hyperrealistic rendering styles. More significant than its photorealism, however, was its emotional realism. Anatoly Petrov showed extreme realism (close to photorealism) without rotoscopy, photography or any "cheating". Photorealism evolved from Pop Art and as a counter to Abstract Expressionists. Her work pioneered the art genre of photorealism; her work encompasses painting, sculpture, and photography. But gradually, Flack became a New Realist and then evolved into photorealism during the 1960s. True photorealism occurs when the rendering equation is closely approximated or fully implemented. Photorealism is also no longer simply an American art movement. Penny sculptures go beyond the concept of photorealism in three-dimensional space. He is considered to be part of the Photorealism art movement. Many PBR pipelines have the accurate simulation of photorealism as their goal. Many people compare it to Photorealism, but just with denim, not paint.