OK, and that also explains why the 3:00 and 9:00 portals appear almost invisible in the docking video, to the point where I thought you were writing more satire. The question then becomes, whether a porthole that has been covered over and riveted shut, should even be called a porthole? I agree, this could explain the permanently black appearance from inside.Perhaps the 3:00 and 9:00 o'clock portals have been permanently covered from the outside, and this is why the one appears black in the interior shot?
This is a redux of the same problem raised by the late Dave McGowan in his Moon landing analysis. The difference in the effective luminosity of our Sun to other stars is hard to imagine, until one comprehends the difference in distance. Also, because our eyes' irises help to compensate for such differences, to a smaller extent. Try using a PV solar panel inside your dwelling and see how much energy it produces from your lights. Not very much.For whatever it's worth, my theory about the stars is that they are very far away, and therefore much dimmer in brightness than either the Sun, or any object directly illuminated by the Sun. Indeed, they are below the threshold of brightness necessary to excite the photoreceptors in the camera, when it's adjusted to correctly expose the highlights in the image of the spacecraft.