In lesson 3 we start looking at the real world instead of boxes to see how we can trace and mark the horizon line, perspective lines and vanishing points for 1,2,3 point perspective reference. Once you are able to know where these elements are, you will be able to easily deconstruct a complex scene into it's basic shapes in order to draw it on your canvas.
I Hope you find it helpful and enjoyable to watch :)
Lesson 3: Tracing Perspective Lines in Reference Photos