 And they are drawn with crayons made out of minerals. So there are different colors, red and black, ochre and white. The modern aspect of the work is what fascinates me. They were already exploring all the Trompe-l'oeil effects of perspective, three-dimension, abstraction, cubism. All this exists during the Paleolithic. Picasso said when he saw the art that he'd met his masters and that nothing he could do hadn't already been explored by Cro-Magnon artists.