wrong-less than right angle

Is Related To Spacing Of Vanishing Points And Cone Of Vision

If we were now to add more cubes above and below using the same vanishing points as before, these new cubes would appear distorted. Their front corners (as noted) would be less than right angles. A cube would never appear this way.

The reason for this excessive convergence is simply that these new, cubes are outside of the observer's cone of clear vision.

In real life, if the observer stepped back he would see more cubes clearly (i.e., his cone of clear vision would simply include more of them) and the distortion would' disappear. (See diagram at right.)'

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