Ground-based and HST color image of the galaxy cluster Abell S1063 with the wedge redshift diagram from the CLASH-VLT survey. Right panel: WFI colour-composite image of A S1063 (UBVRIz, 30 × 30 arcmin²). The cyan square indicates the VIMOS spectroscopic survey area (28.9 × 22.7 arcmin²), and the white and green polygons indicate the HST FF colour-composite image (F435W, F606W, and F814W) and the footprint of MUSE observations (two pointings, 2 × 1 arcmin²) enlarged in the inset. The dotted and dashed circles have radii R = 1 Mpc and R = r₂₀₀, respectively. Left panel: 3D spatial distribution of all measured redshifts at 0.2 < z < 0.6, where cluster members are marked in red.