Thank you @mitsuki-youko and @patrycja.lerch
It is surprisingly complicated with lots of details. In this one, I drew 2 point perspective buildings the first one is a building of the present and the one below is the one in the future.
Okay, I think I'm done with the prospective study
The line work.
I tried to work on the lines, but it didn't like it, so I added the line work over the sketch and combined it.
I think that's it for now. On to the next one.