For "Interventions IX," we invited José de Souza Oliveira Filho, who was born in 1952 in Macaparana, a town in Pernambuco State. A visual artist based in São Paulo, he holds his first solo show in Recife, in 1970. Known as Maca to his friends, he moves between painting, drawing, and objects. His initial production is strongly marked by the north-eastern culture, which he explores in its formal aspects starting from figurative work and arriving at total abstraction. In the 1980s, the encounter with the neoconcrete artist Willys de Castro radically transformed his trajectory, during which he introduced elements of concrete/geometric art into his works, using industrial materials such as steel, acrylic, and polystyrene. Researching and exploring the relations between color and space, the artist initiates an intense dialogue with neoconcretism in which the straight lines and elementary forms such as the triangle, the rectangle, and the square predominate. The work of Macaparana, a diptych made of stainless steel, is an unfolding of the "Sara" series, which was carried out on paper in honor of a great friend. The rods and spheres that are part of this work are fixed to the floor and wall, presented both vertically and horizontally. They are straight and circular, which project into space, representing a garden. It establishes connections between the plastic universe of the artist and the environment surrounded by vegetation. The hard, rigid, cold structures of objects broaden our field of vision and our perception of the relations between art and nature. There is an interaction between the play of light and shadow in different situations, provided by natural and artificial light.