Enrico Castellani's *Estroflessione* exemplifies his signature exploration of surface and space, where the canvas is transformed into a dynamic, relief-like structure through a series of rhythmic protrusions and indentations. The work transcends traditional painting by emphasizing the physical dimension of the picture plane, creating an interplay of light and shadow that shifts with the viewer's perspective. Rooted in the Zero and Azimuth movements, Castellani's systematic approach reduces artistic expression to pure form, line, and repetition.