Flux contribution at 11.3 μm as a function of radius and height in the disk, for the continuum (from interpolating nearby continuum wavelengths) and the feature. The red dashed and dotted lines represent the vertical and radial τ = 1 surfaces at 11.3 μm, respectively. Left panel: the base model with 1% of 0.1 μm forsterite grains. Right panel: the “New Forst.” model explained in Sect. 7.2. The arrow indicates the viewing direction.