Stellar surface density of the ensemble of extra-tidal features around the entire population of Galactic globular clusters at the current time, as predicted by our models. Left: surface number density. Right: surface mass density. Top row corresponds to model PI, the middle to model PII, and the bottom row to model PII-0.3-SLOW, as indicated. All densities are expressed in a logarithmic scale. The red point-like density maxima correspond to the current positions of the globular clusters. Values of higher density are overplotted. Thus in the case of mass density, diffuse tidal debris of more massive globular clusters covers the entire (ℓ,b) space and occults delicate tidal features, which are more visible when considering number density counts. In all panels, only the reference simulations are shown for clarity.