Escher used black and white. High contrast, which dramatized his art and also brought more attention to what he was drawing, not just the colours.
His “impossible constructions” were shocking. He played with perspective and juxtaposition in a way that couldn’t possibly be true in real life. The audience has to do a double take. Angles and shapes were twisted in impossible ways.
Purely instrumental compositon
the use of fresco had largely been supplanted by oil painting
