Modulation of the observed variation of the granulation contrast modulated (multiplied) by a variation of increasing amplitude in phase with and proportional to the smoothed sunspot index Rs. Amplitudes between the minimum and the maximum of activity of 2% (bottom), 3%, 5% and 10% (top) of the nominal contrast (12%) are shown, artificially shifted for clarity. Long-term variations obtained from FFT filtering are superimposed.