Artist is my day job and this is a decent approximation of what a complex perspective drawing entails. And, really, it probably entails a lot of eyeballing it,

Artist is my day job and this is a decent approximation of what a complex perspective drawing entails. And, really, it probably entails a lot of eyeballing it, too - sketch in something that feels roughly right against whatever guidelines you may have constructed, and leave it at that. "Two-point perspective" and "three-point perspective" are good enough approximations for the common problem of "drawing a scene set within a place built around a lot of right angles". I feel like the computing analogy to make here is "a very opinionated framework": it makes life a lot easier, if you want to do things the same way it's built to do. If you want to do stuff outside of what it's built to do you're gonna have to do a lot of the work yourself.