The terrace of Café Alibi on Egyetem Square offers the appearance of an airy covering. We have divided the surface so that there is a sufficient amount of visibility between the still usable size solar sails to the buildings forming the spatial wall, thus enhancing the spatial experience. The sail grid is turned out of the linear system of the space due to its perceptibility, weightlessness and temporary nature. The planes of the canvases that deviate from each other and the sight of the columns placed without apparent regularity create a light system.