Hwang is best known for creating large sculptural murals of birds, trees and chandeliers. Beginning by projecting an image on the wall, the artist traces its contours. She then fills in the space with common objects like buttons or crystals stuck on long straight pins. To achieve the look of dense foliage or clusters of feathers, thousands of pins are used.
Banksy is an England-based graffiti artist, political activist, film director & painter. His satirical street art & subversive epigrams combine irreverent dark humor & graffiti done in a distinctive stenciling technique. His work has been found on streets, walls, buildings & bridges of cities throughout the world. (source: wikipedia) See Board under construction with examples of his work: "Banksy Art"