First row: Bar strength A₂ as a function of time for all stars (dashed black curve), and for stars initially in the cold (blue curve), intermediate (green curve), and hot (red curve) disks. Second row: Height profiles in the B/P region of all stars, and stars initially in the cold, intermediate, and hot disks. Models 1 and 2 are shown in the left and right columns, respectively. In the panels in the first row, the gray area indicates the time of disk bending. At the end of this instability phase, a B/P-shaped bulge is formed in both models, and its morphology does not change significantly after that time.