Cassinari took part in the exhibition entitled Exposition de peinture moderne italienne depuis 1850 à nos jours, which was organized by the Venice Biennial in Cairo. At the Il Milione Gallery in Milan he exhibited twenty paintings, that he created in 1948 and 1949: he was very successful with sales and with critics too and in an article on the magazine “Emporium” (March, 1949), the critic Podestà defined him as “one of the most serious among all the disorientated painters belonging to the last generation”.
At the third national art exhibition held in Alexandria (Premio città d’Alessandria) he exhibited his Il cappello verde (The Green Hut) out of competition. At the Twentieth-Century Italian Art Exhibition held at the MOMA in New York Cassinari bought The Mother, a painting that was presented at the Biennial in Venice during the previous year. During the exhibition entitled Pittura Contemporanea Italiana, for the Italian contemporary painting, which was mounted in Venice in October, the Italian Ministry of Education bought Cassinari’s Natura morta con fruttiera (Still Life with Fruit Dish) to expose at the Modern Art National Gallery of Rome. According to his latest awesomeness about Picasso’s works he made his first journey to Antibes, a place he had been continuously visiting till 1953.
Cassinari opened his own studio at les remparts close to the Grimaldi Museum, which is now Picasso Museum, and he attended not only Picasso, but even other artists and exponents of the culture of those years, such as Matisse, Chagall, Braque, Cocteau and the poet Éluard, whose poems book Cassinari illustrated later.