P_ℓ at λ = 500 nm for different cloud-top pressures p_c (600, 700, and 800 mb) and cloud coverages F_c (0.3, 0.5, 0.7, and 0.9) for planets with patchy clouds. Different line-styles indicate different values of F_c and different colors indicate different values of p_c. Each curve is the average of 300 curves pertaining to 300 randomly generated patchy cloud patterns for the given values of F_c and p_c.