Spanish artist Jaime Sanium Qabo created incredibly realistic digital paintings with his own fingers. Amazing thing about his creative art is that he didn't use any canvass for that purpose but uses iPad for creating these awesome paintings. For these type of paintings he uses a sketching and painting app to create finger paintings. He has graduated in fine arts and also wrote some doctoral thesis on art and new techniques in art. Check out the below mentioned list of highly realistic paintings.
Coffee Without Gravity
Rock, Paper, Scissors