[philman_36]

So where does the sun go when it goes down on a flat surface?
It doesn't go down, it goes away from you.

Perspective.

Or do you think the poles, tracks and fence are going "down" or that they are shrinking?

[SkyDancer]

Ah, but those points do connect at infinity. I do have a problem with the GPS on the plane telling me I’m flying in a curve when the ground is flat in front of me.