Examples of templates at inclination angle i = 0° used to describe the AD plus T emission. Different panels show how the torus emission changes when the physical parameters are varied, i.e. optical depth τ, ratio of outer to inner radius R = R_out/R_in, half-opening angle OA, and the p and q parameters related to the density gradient along the radial direction and with polar angle ρ(r,θ) ∝ r^{− p}e^{− q | cosθ |} (Granato & Danese 1994).