He was captivated by the colour and light that is so characteristic of Provence. It was his ability to capture that light in his images that earned him the support of many patrons and led to many commissions. He painted numerous large frescoes in the Hotel de Ville in Saint Martin-de-Crau, the Hotel de Ville in Saintes-Maries-de-la-Mer as well as the dining hall of the Collège Ampère in Arles. A stained glass window for the church of St Louis in Marseilles was also included in his commissions, (designed by him).

In 1935 he returned to Paris, taking part in the vibrant atmosphere of creativity in the capital.

Following the invasion of Paris in 1940, Dyf went to Arles and subsequently joined the Resistance only to return to Paris after the city was liberated. In the following years Dyf travelled regularly to Saint-Paul-de-Vence in the South, exhibiting his work in Marseille, Nice and Cannes and in 1949 he exhibited for the first time at the prestigious Galerie Petrides in Paris, followed by exhibitions at the Salon d’Automne, the Salon des Artistes Français and in 1950 he was asked to exhibit at the International Exposition des Beaux Arts at the Carnegie Institute, Pittsburgh.

During a short stay in Cannes, he met his future wife Claudine Godat. They were married in 1956 and settled in the village of Bois d’Arcy not far from Versaille. In winter they returned regularly to Provence, painting countless motifs of a place he had an artistic and emotional attachment to.

His work was widely admired in France and he had several successful exhibitions in the United Kingdom and the United States of America.