Visualisation of the ray-tracing fitting to the B68 data according to Table 3. We show the functional relations we used for fitting the LoS distributions of the dust temperature and the volume density that cover the range of valid solutions for each of the modelled quantities. The column density is the result of the integration of modelled volume densities along the LoS. The shaded areas represent the modelled range of values including the uncertainties of the fitting algorithm. Only the best fits (solid lines) are used to create the maps that show the dust temperature, the column density, and the volume density distributions.