Alternative best-fit models of the UV morphology of A2744-45924 in the NIRCam filters F070W (top) and F090W (bottom). This figure is analogous to Fig. 1, but for each filter we apply the best-fitting model from the other filter, keeping its geometrical parameters fixed and allowing only the intensities to vary. The residuals of the extended component reveal that its geometry differs between the two filters. The more extended morphology seen in F070W may reflect a significant contribution from Lyα emission to the flux in this band.