Current image of the TW Hya transition disk. In black, we represent the centrally concentrated large-grain population, which is also strongly vertically settled. The light-gray outer-disk region between 60 AU and >200 AU is not constrained by our radiative transfer model, but is discussed in Sect. 8.2. We also indicate the regions constrained by the different data sets. The near-infrared data provide only weak constraints (see Sect. 8).