Face-on density distribution of all disc particles (thin+thick) at the end of the simulation run (t = 9 Gyr) for all thin+thick disc models with varying f_thick values. The white solid lines denote the constant density contours. The solid black circle in each sub-panel denotes the corresponding extent of the bar (R_bar). Left panels: density distribution for the rthickS models, and the middle and right panels: density distribution for the rthickE and rthickG models, respectively. The thick disc fraction (f_thick) varies from 0.1 to 1 (top to bottom), as indicated in the left-most panel of each row. A prominent bar forms in almost all models considered here.