If anyone is actually curious about the shape of the earth, and is skeptical of cameras in space and at high altitude because of fisheye, CGI, or other arguments, here's something for you:
When accurately and precisely triangulating between survey points, the angles will add up to slightly more than 180 degrees. Of course, flat triangles with more than 180 degrees of interior angle are impossible. That's because these aren't flat triangles, they're spherical triangles. These spherical excess values, which are a precise measurement of Earth's curvature, pop up well over 100 years ago in geodetic survey papers. These are professional resources that were used for precision navigation, not some kind of public affairs piece. None of this stuff was publicized, it was just going on in the background building the foundations of early modern navigation and communication.
If you want to, you could start triangulating points yourself with a plum-bob and a surveyor. You'd figure out pretty quick that the Earth's curvature is there and you can't ignore it.