Doppler maps combined from the tomograms for the Hα line in superoutburst and quiescence (left) and for Hα and the He I lines in superoutburst (right). The maps are shown on a linear scale. Different colours represent different lines (red and navy show Hα in quiescence and in superoutburst, respectively, and dark red shows the He I lines in superoutburst). The EEC, the brightest emission component in Hα in superoutburst, is flattened to show other emission structures in more detail. The quasi-elliptical dashed lines represent velocities at the tidal truncation limit.