Drawing Staircase and Sphere Illusion. 3D Trick Art. <br />Drawing stairs and levitating ball.<br />Materials used: <br />Pastell paper: light gray. <br />H graphit and charcoal pencils (Derwent) <br />Markers, (Stabilo brand)<br />White "charcoal" pencil.<br />Derwent brand.<br />Grey markers: Letraset PROMARKER.<br />Soft eraser.
