@mattdm they probably meant that vertical lines are parallel to each other 😂
This is always the case, unless you apply some sort of a fish eye filter, so thats obviously a joke.
@dhruvasambrani Vertical lines generally are *not* parallel to each other, simply due to perspective. However, since we mostly exist at ground level, our mental model does not account for that, and when we see a photograph — which simply reflects the actual perspective, as it can do nothing else. This is one of the reasons looking up from the base of a skyscraper can induce vertigo — your brain wasn't expecting that!
@dhruvasambrani
I'm poking fun because, while I do expect profesional architectural and real-estate photos to pay attention to details — including this — it's really a trivial thing. I'd say the more import concern of a skilled photographer (pro or not!) is *lighting*. And actually the examples he was so excited about did a poor job on that front.