Photo-center positions computed from the intensity maps of the RHD simulations in Table 1 in the Gaia G photometric system. The different snapshots are connected by the line segments, the total time covered is reported in the Table. The time interval between two consecutive points is 2 × 10⁶ s (about 23 days) for all simulations except for st35gm04b1n001, for which it is 4 × 10⁶ s. The dashed lines intersect at the position of the geometrical center of the images while the red dot and the red circles display the expected observable position of the star ⟨P⟩ with σ_P uncertainty. The movies are available online.