Evolution of the Paα emission line (upper subplots) and the corresponding differential phase (Δϕ, lower subplots) as a function of the wavelength for different values of model parameters for an aligned CB-SMBH system. Orbital elements that are the same for all clouds in both BLR are designated by the subscript, c. Varying parameters are listed in sub-captions; 𝒞 stands for the coplanar CB-SMBH system. (a) i₀ = 45° ; i_k = 𝒰(90° ,10° ), δi_k = −10°, Ω₁ = 200°, Ω₂ = 100°, ω_k = 210°, e_k = 0.5,  k = 1, 2; 𝒥 = 𝒰(5° ,45° ), δ𝒥 = 5°, Ω_c = 200°, ω_c1 = 150°, ω_c2 = 210°, e_c = 0.5, (b) i₀ = 𝒰(15° ,45° ), δi₀ = 5, 𝒞, Ω_k = 𝒰(170° ,230° ), δΩ_k = 20° ω_k = 𝒰(270° ,170° ), δω_k = −20°, δe_k = (0.1, 0.5), δe_k = 0.1, k = 1, 2, i_c = 𝒰(−5° ,5° ), Ω_c = 𝒰(20° ,160° ), δΩ_c = 20, ω_c = 𝒰(120° ,20° ), δω_c = 20°, e_c = e_k.