Look at this picture. Does this look flat (theoretically)? Of course not! Does it look round? Yes, but it isn't. This 3d model consists of several flat surfaces all angled to make it look round. Don't believe me? Ask any 3d modeler!
Now, I'm seeing people here saying "The Earth is round! Look: RET = Real Earth Theory, FET = Fake Earth Theory", and even more of "Look outside your window, the ground is flat! see?!"
Look, just because you can take any one small part of Earth and call it flat, does not mean the rest of the Earth is flat. Infact, when I look outside my window, there are various hills and stuff. They're not flat, unless you were to cut out the side of one of those hills. My point being, is that the Earth is too big to come up with any conclusions on its shape just by looking out your window. It's like saying that air doesn't exists because you don't see it.
Things aren't exactly as you precieve. FE'ers merely looked out their window, saw a flat patch of ground, and suddenly assumed earth was flat, and made up a bunch of crap to make it seem a little more true.