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Description: There are important differences between central and peripheral vision. With respect to shape, contours retain phenomenal sharpness, although some contours disappear if they are near other contours. This leads to some uniform textures to appear non-uniform (Honeycomb illusion, Bertamini et al., 2016). We studied extended textures created with a square grid and some additional lines that are visible/invisible depending on whether they are located at the corners of the grid, or separated from the grid (control condition). Participants judged the extent of the region in which lines were seen. We compared cases in which the central region was informative (same) or non-informative (different). We also tested sensitivity in the visual periphery in a forced-choice task (line tilted left or right).