Victor Vasarely. BIDIM, 1968. Victor Vasarely, widely regarded as the father of Op Art, was one of the most influential figures of 20th-century abstract art. His research into visual perception, color, and geometry transformed the relationship between viewer and image, creating compositions capable of producing movement, depth, and vibration through precise mathematical structures. 'Copyright 1975 Editions du Griffon, Neuchâtel/Suisse' on the back. Dry stamp of the Vasarely Foundation. Photolithography on gloss paper. Total dimensions: 27 x 27 cm. Fine condition. In BIDIM (1968), Vasarely constructs one of his most powerful optical architectures using a repetitive cubic grid that folds into itself, generating the illusion of an impossible volume. The structure appears to simultaneously expand outward and open inward, creating a visual paradox in which the flat surface transforms into an unstable three-dimensional construction. The chromatic contrast between red and green intensifies the vibratory effect of the composition, producing a constant optical tension that actively engages the viewer’s perception. This near-interference color opposition is central to Vasarely’s language, where color is no longer decorative but becomes a structural agent. The work belongs to a period in which the artist achieves a complete synthesis between art, science, and system. Here, the image is not the result of an individual gesture but of a reproducible constructive logic, anticipating key concepts of digital art, visual programming, and generative design.