Photograph pictures generated by running Elysium for (from left to right) the opaque slab (Sect. 2.3a), ORST (Sect. 2.3d), the semi-opaque PD, and the translucent PD (Sect. 2.3f). In the left column of each set of pictures, there are photographs taken from a screen with a 45° inclination and in the right column with a 85° inclination. Each line has a different BH angular momentum. Moving from top to bottom, these are j = 0, j = 0.5, and j = 0.998. Below each picture group, we can see the used color scheme from minimum to maximum. The produced images are in agreement with other works, e.g., Younsi et al. (2012).