>>2123683You've been saying you want to learn.
The red lines are drawn along horizontal, parallel lines. They converge at the horizon; green.
This also marks the elevation of the "camera". If the horizon cuts through object A at, say, 6 feet above the ground, it cuts through ALL objects 6 feet above the ground regardless of where they're placed or how close to the camera they are.
Note that it cuts through the awning-edges. People can easily walk under them, so they must be 7 or 8 feet up. And it cuts her face at the same height. Therefore, she's 8 or 9 feet tall and is incorrectly scaled against the background.
