Matter density contrast in a 2D projection of a zoomed-in volume of (15.37 h⁻¹ Mpc)³ around the position of the most massive halo found by AHF in the corresponding Open-GADGET simulation. The box size of this volume corresponds to six times the virial radius of the Open-GADGET central halo. Silver and cyan circles denote the virial radius of halos and subhalos identified in this region, respectively. For the sake of clarity, a mass threshold of (10¹²) 10¹³ h⁻¹ M_⊙ was imposed to select the (sub)halos presented.