Upper left: same as Fig. 3 but with T-REx filaments shown in grey areas. The main detected filaments are indicated with cyan ellipses. Upper right: zoom-in region around the SSC system with normalised number density of star-forming galaxies. Lower right and left: same as upper right but for transitioning and passive galaxies, respectively. The white areas correspond to normalised number density values such that n_population/n_all/galaxies < 0.1. The white stars correspond to known clusters, projected 3D filaments are indicated by grey areas, while orange and turquoise contours correspond to the tSZ and X-ray signals, respectively.