The problem with the flat earth model where Antarctica is at the very edge as an "impassable" land mass. This model is even more confused with the Sun and moon rotation in this model from the various pictures, diagrams, videos, and animations that are provided by FE'ers
In this theory it states that the sun and the moon circle back and forth but only light the areas of the planet that they are directly above. In this example, if the sun is on the North America side, then the Russian side had the moon over it, and is lit by the moon.
The problem with this theory is that it doesn't account for the piece of Antarctica that is in that region of the flat earth that is dimly lit by the moon. In this example we will use the Russian part.
Most people have gone to great lengths to explain that the distances are too vast to traverse from the top of Antartica to let's say down the middle and to the other side. Because according to this model, they are on opposite sides of the flat earth map, and to get between the two distances one would have to travel from edge to center to edge on the opposite side of the entire flat earth to make the journey.
In Antartica we have a 24 hour window of sun where the sun will literally go in a circle in the sky. Taking that into account, if you are standing at any point of Antartica in the flat earth model where Antartica lines the edges of the flat earth, you would not have a situation where there is a 24 hour sun period.
The link below has several life feeds of Antartica cams for pretty much every day. And it shows the sun lighting up the skies 24 hours.
http://www.antarctica.gov.au/webcams/davis The question then, in this model, how is the sun lighting Antartica for 24 hours?
Even the revised version of the flat earth model in which antartica does not line the edge of the map does not support how the sun and the moon would work in this model.