How To Draw The Impossible Triangle - Optical Illusion, via YouTube.
Op Art and the Elements of Art - Expressive Monkey - TeachersPayTeachers.com
Optical illusion art project- link to tutorial
tutorial on perspective drawing. Great blog site for all type of art.
Single perspective template
tutorial city in perspective 2 by ~lamorghana on deviantART...Love looking up. Something different then the aerial view.
skeleton gothic art
Actually went shopping at hot topic today