Grain sizes from st28gm06n052 against radial distance from the centre of the RADMC-3D-grid in 100 spherical shells. The plot starts approximately at the stellar surface, 1.65 au. The middle black curve is the average grain size of each shell, the darker green field is the standard deviation of the grain sizes, and the lighter and widest green field is the minimum to maximum grain size range. The black vertical dots indicate half the size of the computational box (centre to edge along an axis).