Variation of the excess number of M_ap pixels over noise with cosmology. The black curve corresponds to the excess 1D M_ap in the observation mock, with error bars from the diagonal of the covariance matrix. Color-coded are variations in Ω_m (top left), S₈ (top right), h (bottom left), and w₀ (bottom right). A smooth color gradient indicates a correlation between the data vector and the probed cosmological parameter. No tomography has been performed here.