Here is a lesson on 2 point perspective. I voiced over this lesson because some rowdy students outside my door made the audio on the original recording a little tough to follow.
Items covered in this lesson include: horizon line, eye-level line, vanishing points, line-weights and finding the midway point of a structure that is "vanishing" into the distance.
A link to my website:
http://www.joshuahendry.com/
A link to my book The Legend Of Harapan on ComiXology:
http://cmxl.gy/1iDI0EL