Shape of the disk wall as a function of planet mass and disk viscosity. Solid contours and colors denote the fitting parameter w from Eq. (1), which is w ∼0.33 to 0.40 for our best-fit radiative transfer models. The dashed line denotes a gap depth of 10^-3. In the region below, the gap is deep enough to be consistent with the observed visibilities. Blue colors indicate rounder walls, red colors more vertical walls. The triangles indicate the models used for iterating on the pressure profile (see Sect. 5.3). The white regions contain models that neither converged nor finished 10⁵ orbits due to excessive computing time.