Perspective is a daunting subject for an artist who prefers to draw organically like myself. Here, I try to break it down to the essence with exercises from Scott Robertson's How to Draw book, which I cannot recommend enough.
Supplementary slides and notes can be downloaded here:
drive.google.com/open?id=1lyQ...
I've lifted some of the lesson materials from these sources:
Scott Robertson - How to Draw ( www.amazon.com/How-Draw-sketc... )
Great foundation series by moderndayjames where he goes through topics about perspective in more detail: • Drawing Fundamentals