Doppler map for V4142 Sgr which shows the gainer almost at the center of mass together with its companion (top-left). The structure of the accretion disk shows both slight and wide absorption zones (top-right). Contour lines represent levels of emission. Doppler map without donor contribution, showing diverse dense zones of absorption (bottom). The set of panels were calculated with different λ. Red zones indicate absorption and gray-black zones emission in the Hα line.