Op Bulge

A flat grid, pushed outward from the middle. The page stays flat and a sphere sits on it anyway.

Op Bulge: A flat grid, pushed outward from the middle. The page stays flat and a sphere sits on it anyway.Op Bulge: A flat grid, pushed outward from the middle. The page stays flat and a sphere sits on it anyway.

About this pattern

After Victor Vasarely's distorted grids, 1960s

Op Bulge, op art, drawn by GART: A flat grid, pushed outward from the middle. The page stays flat and a sphere sits on it anyway.
Op Bulge · CC BY 4.0

Vasarely built his Vega paintings from exactly this: a regular lattice displaced by a smooth radial function, with no shading of any kind. Curvature is inferred from how the spacing of a known-regular texture changes across a surface, so widening the grid toward a centre is read as that centre coming forward. The form is entirely in the spacing: every line is the same weight and the same colour.

Behind the mathematics

Victor Vasarely1906–1997

Distorted grids

Hungarian-French artist regarded as a founder of Op Art, whose distorted grids appear to bulge out of the canvas.

Bridget Rileyborn 1931

Swelling Op Art surfaces

British painter whose black-and-white Op Art of the 1960s made flat canvases appear to swell, ripple and flicker.