Abstract art based on Cézanne's idea that all depiction of nature can be reduced to three solids: cube, sphere and cone. With the painting "Les Demoiselles d'Avignon" (1907), Picasso dramatically created a new and radical picture depicting a raw and primitive brothel scene with five prostitutes, violently painted women, reminiscent of African tribal masks and his own new Cubist inventions. Analytic cubism was jointly developed by Pablo Picasso and Georges Braque, from about 1908 through 1912. Analytic cubism, the first clear manifestation of cubism, was followed by Synthetic cubism, practiced by Braque, Picasso, Fernand Léger, Juan Gris, Albert Gleizes, Marcel Duchamp and
Pablo Picasso colour as an expressive element, but relied on drawing rather than subtleties of colour to create form and space. He sometimes added sand to his paint to vary its texture. A nanoprobe of Picasso's "The Red Armchair" (1931) by physicists at Argonne National Laboratory in 2012 confirmed art historians' belief that Picasso used common house paint in many of his paintings. Much of his painting was done at night by artificial light. Picasso's early sculptures were carved from wood or modelled in wax or clay, but from 1909 to 1928 Picasso abandoned modelling and instead made sculptural constructions using diverse