You may have seen this on the Twitters. Manga artist Ikku Masa pointed out that this still from Studio Ghibli’s My Neighbor Totoro has two vanishing points where you would expect one:
I thought it’d be interesting to “correct” the perspective. This is more or less what the image would look like in one-point perspective:
(Yes, I had to take the sliding doors off. Just take it as necessary to show what the entire room looks like.)
Now, why did the background artist “cheat” the perspective? I think the best way to understand this is to concentrate on the blue lines. Moving the vanishing point left, to the center of the back wall, means the lines have to spread out more. That in turn means that the left wall gets a lot bigger. The right wall is bigger too, though not by as much.
The middle frame ends up smaller, including on top, so we see more of the partial wall at the top. (And because this frame is narrower, including the doors would block most of the far part of the room.)
The overall effect is to make the room look smaller. You don’t feel like you’re looking into an expansive room; it’s more like standing in a tunnel.
What would you actually see in the room? Well, not quite either view. For one thing, you have two eyes, which see slightly different views. For another, the moment you turn your head, you’re not getting a one-point perspective at all, but a two-point perspective. Once you look at the left wall, you see it as facing you, not slanting toward the distance.
On the other hand, you wouldn’t see the Ghibli view either. The artist’s choice emphasizes the walls facing us and the floor leading to it. Plus it creates a maximally wide space for the characters to move in.
(One more thought: the tatami mats on the floor, in the original, don’t lead to either vanishing point— or to a single point at all.)
Anyway, it’s a really interesting example of an artist straying from camera realism and getting a nicer result by doing so.