So, currently trying to get into drawing, again.
When it comes to 2 point perspective drawing, what do you do if you decide that you want to draw outside the two vanishing points you created?
You don't want to have both vanishing points on the same paper unless the page is fairly wide or you're working with smaller scale objects. Having vanishing points that are too close together can cause some major distortion which won't look natural.
Unless you want shit to look like it's gone thru the warp and back, then you don't want to do that.
Either make your cone of vision larger or dont do it at all
you're supposed to draw near the focal point, which is between the 2 vp's, to reduce the distortion. the thing is: if you want to depict things at near 45º you'll have no problem, but if you need to show things at 80º or something, you'll better choose a 1 point perspective.
unless you're intentionally going for distortion, and in such case, you better know your shit.
my advice: just use any 3d modeling software.
The proper way is to just make the cone of vision larger by pushing the vanishing points further back.
If you don't want to do that though what you've gotta do is turn into Kim Jung Gi and warp the perspective so it looks right.
human eyes don't see both vanishing points at the same time unless there is warping occurring , if you do have two on a page be prepared to warp the edges in some fashion either by curving the lines inward or outward keeping in mind that only goes so far.