Magnetic field derived from polarization (top) and magnetic field inferred from VGT (bottom) using a synthetic PPV cube. Magnetic field is superimposed on the polarized intensity map I_p and visualized using the LIC. Cube is produced from MHD simulation A1 at t_r = 0.8 Myr, using a unity density field while keeping the original velocity field unchanged M_S = 6.52, i.e., all collapsing materials are removed. Corresponding AM = 0.98.