In the latter half of the 1950s, Raveel starts to fear that his art is becoming too cerebral. Influenced in part by the Cobra movement and abstract expressionism, he seeks to return to a form of painting that is more spontaneous and intuitive. He finds inspiration for this in the organic quality of nature, in this case a tree. With his use of bright and vivid colours, Raveel seems to lose himself in the act of painting itself. By the end of the process, the starting point for the work is usually scarcely identifiable, if at all. Few works from this period are given titles. It is the experience of painting that comes to be central here; attention is paid to the brushstrokes and the colours, which exhibit a certain freedom.