Photometric planetary transit computed by the model. Left: transit of HD 209458 b in case of (dashed blue) quiet photosphere, (green) spot-only activity, and (orange) spot+faculae scenario. Fluxes are normalised by their out-of-transit fluxes. Middle and right: snapshots of stellar configuration at two times marked by the blue arrows in the left panel. The transit cord is marked by a dashed black line, while the planet position is marked by a transparent and white circle, with the planet extent correctly scaled to the stellar radius. Stellar flux is coloured-coded as in Fig. 1.