 His theories about Romero Brest's vacuum aesthetics and informalism prompted Hilda to arrive at her own plastic universe.Her series "Streets and inlets of Montevideo", exhibited in Washington in 1961, received a glowing critique from Frank Getlein in "The Sunday Star".In 1964 López traveled to Portugal accompanying an exhibition of Uruguayan artists, where she stayed for a time and had a stormy relationship with the Portuguese painter Henriques Tavares.