Visibility calculations and differences for a set of 3197 modes, obtained using two different θ resolutions, N_θ = 300 and 2000 (left panel), two different φ resolutions, N_φ = 720 and 4000 (middle panel), and two different integration methods in the theta direction (right panel). These modes were calculated in a 2.0 M_⊙ model at 0.6 Ω_C, with an inclination angle i = 10°. If i = 80° is used instead, the differences are reduced.