Scatter plot of the y-offsets of selected models from Sects. 5.3.1, 5.3.3 and 5.3.4. For each transition the difference between the offset of the simulated and the observed peak position, as defined in Eq. (45), is plotted. All offsets are relative to the [Cii] peak position, hence, for the reference [Cii] transition y_diff is always zero. A negative offset indicates that the simulated emission peak is shifted too far into the direction of Θ¹ Ori C, a positive offset indicates that the emission appears too deep in the cloud. The different transitions are indicated on the abscissa and different symbols mark different models.