I have a new lesson at Curious.com – learn how to use perspective to draw in 3d – at the moment it is free so get on over and check it out. It’s quite a comprehensive lesson in 1- 2 and 3 point perspective.
Click this link, and when you sign up to Curious.com you will get $25 that you can spend on lessons in all sorts of things. click it quick not many left on this offer! I learned a lot about CSS design for websites!