If you believe a flat surface cannot have a horizon, and you believe that a horizon that is seen only 3 miles out, has gone over a curving downward surface, then you’d also believe the surface 3 miles away on a flat surface would be seen higher than it is now, right?
Perspective would make both surfaces appear to rise up, both appear entirely flat over that 3 miles, yet one of the surfaces is curved, only the other is flat?
How could perspective make curved surfaces appear to be completely flat?
If we tilted up both of these surfaces, one that is flat, one that curves downward by 8 inches in the first mile, and by 3 feet or so by 3 miles, would it look perfectly flat over the three miles of curving surface?
Perspective doesn’t make curved surfaces appear completely flat, nor make a ragged surface with dips and bumps look perfectly flat over it.
When we see a wake or waves on the water, they don’t look flat, but the whole surface itself looks flat.
Yet somehow you believe that perspective makes curved surfaces look perfectly flat, because you think there really IS a curved surface that cannot be seen at all, because the curve is only down a couple feet over 3 miles, and you believe that would make it look exactly like it was perfectly flat?
Then you would HAVE a perfectly flat surface, not a curved surface that looks exactly like a flat surface.
Perspective makes whatever type of surface appear to rise, unless it slopes down over the first 50 feet out or something. Even that surface would first appear higher for a bit, though.
There is one thing we know that perspective cannot do, won’t do, could never do….it cannot change the appearance or shape or type of those surfaces, from a bumpy uneven surface into a perfectly smooth and flat surface.
Since a curving downward surface is never at all flat, and only curves over it, they cannot look perfectly flat over them, three miles out on it.
What would possibly make a curved surface, that has curved downward by about 2 or 3 feet, in three miles, look exactly the same as a REAL flat surface would look?
Perspective does not make a curve going further and further down on a surface, lift upward from there, and flatten it out, and rise upward as a flat surface, it magically flattened out curves over it!!
It is correct that perspective makes all surfaces appear to rise upward over distance, that is based on how we see things in the distance, where objects look smaller and smaller with distance, yet they’re the same size throughout. They will eventually be too small to see, if they could be seen, and we can always see them with instruments, as long as they can be seen at all. Instruments are basically more powerful eyes we use as our own eyes. They magnify what our eyes cannot see, or not as close, or as clear or sharp.
This idea that horizons cannot exist on a flat surface is nonsense, even if the surface continued to rise and rise forever outward as you claim.
Look at how high the surface appears to be three miles out. You think it’s that high over a downward curving surface, so you’d think it’d be higher than that over a flat surface, right?
Imagine it’s all flat beyond the horizon. You think it would keep rising up higher and higher after 3 miles out, but what would it look like by another 10 or 50 miles out while still ‘rising up’?
If it only rises very very slightly over the next 50 miles, then you’d have 50 miles of that surface which is past the height of the horizon, or where the horizon would be, you think there wouldn’t be one on a flat surface.
But you know that the flat surface would look at least that high up, or higher, that cannot be excused away.
So we would have to either see all objects over a flat surface that’s already higher up than we are, a ship we see atop the horizon is only three miles out from us. When it is 4 miles out, and is still seen as before, how could it rise up enough to see it beyond that height, could only be done if the surface rises up higher than the next mile over the surface, otherwise it would not rise up enough to see it over the mostly flat surface in that one mile past the high surface.
It cannot rise up, however slightly, over the next 300 or 400 miles, and could possibly see objects that are there, simply because our angle of view past 3 miles is already higher than us.
Imagine a ship you see high upon a horizon, and past that point, it is entirely flat or ‘slightly rising’.
Our angle of view is lower than the ship is seen by us, so when it sails out another 10 miles more, where does that 10 miles of surface go? Where do we see that 10 miles more of surface? It has to go up higher than the first 3 miles in order to still see it all, right?
If it doesn’t rise up more than the rest of the surface has risen, we couldn’t see it, right?
You’ve got either an endlessly higher up surface that’s always seen higher than the nearer surface is, which would soon block out the entire sky above Earth, block out the Sun, moon and stars, within the first few hundred miles outward, or maybe half that distance, but whatever the distance would be, we’d see nothing at all by that point.
Or you have an extremely slightly rising up surface, where everything past that height of surface goes out almost at that height, over a nearly flat and level surface over the next 300 miles, where we can see a ship high above us 3 miles away. The angle of objects would be smaller and smaller with more distance, and already would be seen higher than we are, so objects past that would soon be impossible to see, once again, and there WOULD be a horizon on it. The angle is eventually as high as we can see out on the surface, and forms a horizon on it at that point of distance.
Either one fails to work, but thankfully neither one happens on our flat surface of Earth. It would look horrible if it did either one.