Patch of a map projected with regard to its center, taken from a realization of fast simulations. The left, middle, and right panels give the fields κ^{1 / 3}, , and , respectively. We have taken the cubic root to emphasize the contrast. It is clear that the signal is completely dominated by the noise. Even though the smoothed map is quite different from the original one, the structures, high-signal regions are still conserved and traced.