Within each square region i, we placed another window j(i) (blue box in Fig. ) with a window size of 63 pixels (= 101/sqrt(2)) to allow for complete rotation of the enclosed region j within the boundaries of region i. We rotated the blue square around its central point with an angular step size set to Δθ = 0.9°, resulting in 200 rotations. We then calculated 1D line profiles by summing over the vertical axis for each orientation j(i) (Fig. ). Due to planes of symmetry, it is sufficient to rotate over 180°, resulting in a total of 200 profiles per region i. As seen, the amplitudes of the line profiles, representing a 1D intensity profile, are largest when the line plot is perpendicular to the line pattern, and smallest when they are parallel (see Fig. : magenta line for an orientation of 40° and orange line for 130°).