Parameters of the PDFs of contaminated clouds corrected for the contamination through the subtraction of a constant offset given by the peak of the contaminating structure PDF. Upper plot: position of the PDF peak on the logarithmic η scale, i.e., a value of 0 represents the correct peak position and a value of 0.3 stands for a 35% overestimate of the peak density. Lower plot: width of the corrected cloud PDF relative to the original cloud PDF. In both plots we varied the amplitude of the contamination in horizontal direction and the width of the contaminating PDF in vertical direction.