High resolution view of the magnification at the source plane. Top panels: positive parity side of the macro-CC. Bottom panels: negative parity side of the macro-CC. The effective surface mass density increases from left to right. The value of the macro magnification and the ratio of the effective surface density to the critical value are shown for each column. Note that the y-direction has been compressed a factor 10 for better visualisation. For the same reason, the two rightmost columns have been compressed a factor 2 in the x-direction.