I've accumulated some more illusions on my humor page:
http://www.tiac.net/~rdh/http/Humor/index.htm
(scroll down to
Illusions:)
And for some
really wierd sh, er, illusions, check out:
http://www.ritsumei.ac.jp/~akitaoka/index-e.html
That is a
static .jpg, it is
not animated. That is your brain providing
the action. The warning that comes along with his site:
Some of the pictures on this website can cause dizziness or might possibly
epileptic seizures. The latter happens when the brain can't handle the conflicting
information from your two eyes. If you start feeling unwell when using this
website, immediately cover one eye with your hand and then leave the page.
Do not close your eyes because that can make the attack worse.
It's really interesting how the brain works; some of his stuff does absolutely
nothing for me, other stuff is just downright unsettling.