Geometry of the BLR models investigated. STOKES allows us to parameterize cylindrical and conical emission regions. The thin Keplerian disk geometry is obtained by taking a height that is much smaller than the outer radius r_out (upper left). The polar wind geometry is a thin hollow bicone with an opening angle going from α₁ = 45° to α₂ = 60° (right). The equatorial wind geometry is built using the same conical geometry as for the polar wind but with α₁ = 75° and α₂ = 90°, resulting in a flared disk with an opening angle of 30° (lower left).