I-grid is an environmental installation where Open Source was selected to transform a typical billboard along Sunset Boulevard in West Hollywood, California. The City of West Hollywood’s Arts and Cultural Affairs Commission donates a billboard along the infamous strip for experimental art and design several times a year. Billboards predominate the visual landscape along the strip and vie for your attention with representational imagery. I-grid presented an opportunity to investigate the billboard typology, not in a representational manner, but rather exploring the geometrical structure of the billboard surface. The project consists of a computed protocol that transforms the original format of an existing 20 ft x 50 ft billboard. Initially based on a 5-foot incremental grid, an evolutionary algorithm produces a series of iterated mutations that index the intensive computing system. I-grid expresses the notion of instability inherent to its info-engineered nature in constant mutation.