Azimuth (left panel) and energy dependences (right panel) of the gamma-ray photosphere contour (τ_γγ ≡ 1) above the accretion disk, for a 20 M_⊙ black hole (ψ = 30°). In the left panel, φ_s = 0°, 60°, 120°, and 180° with ϵ₁ = 1 GeV. In the right panel, the energy of the gamma-ray is ϵ₁ = 1, 10 and 100 GeV for φ_s = 0°. Pair production with stellar radiation is not included in this plot. The dotted line shows the inner radius of the disk.