In his "Cells" series, François Arès juxtaposes layers of black dots or dots of pure colours on plexiglass sheets to obtain an optical effect that changes depending on the viewer’s perspective. The silhouettes he super-imposes, print a fleeting instant, cells frozen in time, awaiting the viewer's gaze to be read. The systematized mechanical aspect of his technique is broken by the imperfection of the gesture, that of his hand which, when he sets the point, accepts the pictorial accident.