FIGURE 4 | Dependence of the obscuration coefficient on the angle between the line-of-sight and the equatorial plane. Left panel : values and the corresponding best-fitting curves are obtained from simulations for θ 0 = 45 ◦ , N = 16,384 and ǫ = 0.01,0.005; N = 8,192 and ǫ = 0.01. Right panel : each curve corresponds to the different initial half-opening angle of the torus: θ 0 = 45 ◦ ,60 ◦ ,75 ◦