Model image corresponding to the best-fit brightness distribution that reproduces the observed MATISSE interferometric observables around the entire line profile of the Brα emission. The image was generated using PMOIRED, adopting the same geometry and parameters that yield the visibility, closure phase, and differential phase fits shown in Fig. 12. The intensity is normalised and displayed in logarithmic scale to highlight both the compact continuum and more extended Brα-emitting structures.