Victor Vasarely is regarded as the father of Op-Art. Even though he achieved great international fame, he insisted on making his art accessible to everyone. His motto was 'art for all'. Trained as a commercial artist, Vasarely soon became interested in the trompe-l’œil effect, graphic patterns and illusions of space. His vocabulary of forms included squares, lozenges, triangles, circles, and rod shapes which he threw together to create aggressive patterns in his pictures, graphics and sculptures. To intensify this impression, he consistently used kinetic effects and optical illusions.