Simulated reconstructions of the original N-body data in the top left panel (density contrast iso-surfaces). The lens planes covering one square degree have sizes of 128 × 128   pixel² on the x- and y-axes. All maps are subject to smoothing (Gaussian kernel with two arcmin r.m.s. width). Top right: reconstruction using only the lensing information (α = 0.05). Bottom left: reconstruction adding information from red galaxy tracers with m_u − m_r ≥ 2.2 (α = 0.05, β = 0.5). Bottom right: reconstruction including information from blue galaxies tracers with m_u − m_r > 2.2 (α = 0.05, β = 0.5). The number and capital letter labels indicate mass peak matches across different maps. The simulated reconstructions display S/N iso-surfaces. The combined maps do not account for GSN.