A striking example of Op Art kinetic sculpture, Yvaral's *Plan espace* employs a precise screenprinted white geometric pattern on a black metal panel, interwoven with taut elasticated strings that create a dynamic sense of depth and movement. The interplay between the flat printed surface and the three-dimensional string elements generates an optical illusion of shifting spatial planes, inviting the viewer's perception to constantly recalibrate. True to the artist's exploration of visual rhythm and structure, the work embodies the intersection of mathematical precision and sensory engagement.