I can give you LINKS for Overviews, Tutorials and Video Tutorials on: Drawing Perspective Shadows External 2-Point Perspective External 3-Point Perspective Internal 1-Point Perspective Internal 2-Point Perspective Foreshortening Drawing a Circle in Perspective Curvilinear Perspective Etc.
Thanks, I had this in Note form, but it is hard to follow with only text, so I did a layout in Adobe InDesign, then just kept hiding different elects and exporting Jpegs. In then layer up the tutorial in InDesign and exported it to PDF with hyperlinks. InDesign is much better suited than Photoshop for this kind of this, as is Illustrator.
You can do this pretty fast, although it is better to take your time and understand what is going on. Note how you can put the horizon and Vanishing point anywhere you want. You would use this to draw in trees, winding roads…
Perspective is very important to your art. Let us say you want to drawing a friend sitting on a bench with his feet pointed towards to observer or at an angle to the observer. His feet should look larger than normal and his head and torso smaller than normal. This gives your drawing dynamic energy and more realism. If you want to draw the inside of a room and not have it look like the furniture is falling out of the room, you need perspective. You need perspective for drawing cityscapes, landscapes, streets, roads, trees, multiple people (especially in action), and on and on.
This tutorial is your first step in learning Perspective.