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5:50 PM, Sunday July 18th 2021

I'm not sure what by extrude is meant. And it's kinda hard to explain with words now, so I made a second quick sketch (the one on the right turn out sloppy).

https://i.imgur.com/mcVQT4W.jpg

but basically my question is, how far have the vanishing points be apart so that the cube has right angles. there has to be some construction process and they can't be both right because then how would you construct a box with other angles then 90°?

6:09 PM, Sunday July 18th 2021
edited at 5:56 AM, Jul 19th 2021

This is how you can get a 90 degree angle on a 2 point perspective. The two Vps must be equally distant from the point that originates the angle.

Right now I can't think of other solutions.

EDIT: forgot to mention that also the height of the point from the HL must be the same length.

edited at 5:56 AM, Jul 19th 2021
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