Comparison of MNPCP prediction results from different viewing angles to the ground truth for a single slice of an example cube subject only to the ISRF. Shown is the same example cube as in Figure 3 and all predictions are determined with the 23-wavelength SLoS-cINN. The presented slice is taken along the main viewing angle analysed in this work (Section 4). The results in the second column correspond to the nominal prediction outcome derived from the main viewing angle (i.e. the cube is observed from the front). The arrow and eye symbol in the third and fourth columns indicate the direction from which the cube is observed instead to generate the corresponding prediction result. The NRMSEs and median absolute relative errors listed in the three right-most panels are determined over the depicted slice only.