149 Twenty-six implied edges

The light source and the perspective on the letters varies. 

26 Implied Edges offers a variety of how-to ideas for fooling the eye.  By careful use of the broad-edged pen on flat paper, you can show the side of an imaginary 3-D solid.  Not only does the brain believe that there is a real object there, but the eye even supplies the missing edge.

Each of the letters here represent an alphabet you can invent for yourself.