Another thing that's been bothering me is the "satellite" pictures (used in weather forecasts). They might be fake all right, but there are so many of them... and the clouds are moving.
On that same note, I've studied the
mathematics used for weather systems and prediction, and they're reliant on RET. A flat Earth would give completely different mechanics (either no rotation, or a rate of rotation that has to increase drastically in the outer plane, for one). It's more than just the satellite photos: the kind of pressure systems we observe the effects of would basically be impossible on a non-sphere.
And said maths is publicly available: open to scrutiny.