I can't find any tutorial on the whole internet (and I think I've looked even in the deepest and darkest corners of it) about true, outdoor cityscape lighting.
How would someone go about creating such a look?
FG and GI take ages to render with such a model scale (even though the background seems too be a matte painting), so is placing a gazillion lights by hand the way to go?
Hello 19860601! There are a lot of different outdoor lighting techniques that can be utilized and in the end what look your project needs really should determine what technique(s) you impliment. Here's a couple quick examples that can get you started: