Left panel: Evolution of the measured inter-band time lag as a function of the time span of the analyzed light-curve segment, starting from the onset of the simulated obscuration event. The dashed green line indicates the intrinsic positive lag (+3.68 days). The black points show the measured ICCF lag. Inset: Simulated intrinsic (dashed) and obscured (solid) light curves. Right panels: Effects of varying the r-band outer radius (R_r,out; top), the cloud radius (R_c; middle), and the crossing angle (θ; bottom). The horizontal dashed gray line represents the input intrinsic time lag between the bands.