Radiative transfer modelling of spatially resolved Lyα profiles (left and right panels) extracted from Voronoi-binned regions (middle panel), along the direction 1 → 2. The observed line profiles are shown in black (with uncertainties shown in grey), and the best-fit models are shown in red. The vertical dashed line represents the line centre velocity corresponding to a systemic redshift of z = 3.066, obtained from JWST/NIRSpec spectra. The middle panel shows two Voronoi-binned regions displayed on the Lyα NB image within a 1.5σ significance, centred on the pixel with maximum Lyα SB.