Paint in Perspective with Len Hend - this video can be previewed free at http://paintwithlen.com/how-to/perspective-in-a-landscape/
A very useful lesson for those painting and drawing in all mediums.Many people paint for years without knowing why their paintings are out of perspective.
This video has the basic information about correct perspective with drawing and with colors.
It will show you how to check your work for correct perspective and what is the correct way to go about color mixing and tones of color to achieve depth in yout paintings. This short lesson is in simple, plain English and will leave you without confusing this often ignored subject.