LUCY--what a delight to see you back! Wish I had your answer, but I've only seen them as "illusions". My dear, I hope you can be with us more often in the future--you're neat.

B96--excellent link. I saw a Dali painting that I found rather disturbing--but then most of his are.

Rod--(good heavens, just now you came out, inadvertently, to be Roc!) Fascinating, about the butterflies! (Got any you can send me?) And, the hotel--did you mean the last picture? I couldn't detect anything strange about the others.

AnnaS., I learned it as trompe l'oeil: fool THE eye, and when I put trompe d'oeil (that would be fool OF eye, not very sensical.) into tsuwm's x-refer, it gave me trompe l'oeil. So I guess trompe d'oeil is an English
(American?) bastardization of trompe l'oeil.