Overview of slices through the structures for the non-circled star in the nominal run C1 at orbit 5 for the midplane. The letter labels correspond to the same features as in Fig. 3, only on the opposite side. In the midplane, the most prominent feature is the free-fall region (marked with b and braces, grey area) just after the spiral arm shock (a). The free fall is notable as the density profile decreases as the radial velocity accelerates. The free fall is terminated when the gas hits the CPD at the left edge of the grey area, seen as a sharp increase in density and as CPD accretion shock (c). We note that we use a linear density scale here for emphasis. The CPD spiral arm can be seen as a temperature bump (d). The black star denotes the same position as in Fig. 3.