Magnification maps for six different (κ, γ) pairs for s = 0.5. The colour scale indicates for each panel the magnification factor μ(x, y). The panels on the left-hand side correspond to type I lensing images (time-delay minimum images) and the panels on the right-hand side to type II lensing images (time-delay saddle images).⁸ In all panels, many micro caustics are present, separating low- and high-magnification areas.