Test of Eq. (15) of HO06. We show here the evolution of the UV escape fraction from two different extremely clumpy shell geometries as a function of the absorption parameter ϵ_c. The first medium (square dots) shows N₀ = 1.00 and is built with FF = 0.10, CF = 0.38, and n_IC/n_C = 0. The second medium (circle dots) shows N₀ = 4.28 and is built with FF = 0.15, CF = 0.70, and n_IC/n_C = 0. In both media, each clump is opaque to dust extinction. The clumps are therefore optically thick for UV continuum photons. Both full lines represent the Eq. (15) for N₀ = 1.00 (top line) and N₀ = 4.28 (bottom line), respectively.