This alphabet table looks like it has been covered with parallel, angeled lines. This illusion occurs best if you look at the thumbnail image. If you open it full size you will get the same effect, only not so intense. Thanks Christopher for you kind submission! For more similar illusions involving letters, check: Da Vinci Code ambigram, Pollen illusion, wavy letters, eye to brain coordination, brain is a genius, elusive victory, which color is darker…