Schematic sketch of the two-pole accreting WD passing the limb of the secondary star, inclined by an angle α to the vertical (red line). The emission regions are located at radial distance ρ and displaced by an angle β from the rotational axis. They are indicated by circles, color-coded for their relative brightness: maximal (green), intermediate (yellow), and minimal (open). The projected views are shown for pulse phase at the center of the eclipse, ϕ_65, c  =  0.25 (top) and 0.75 (bottom). The pictures refer to the ingress (right), mid-eclipse (center), and egress (left). The transit takes almost exactly one half of the observed pulse period. The blue arrows indicate the motion of the WD.