Rod says: However I believe that only "trompe l'oeil" is correct.
Then how come you were using "trompe d'oeil" in your previous post? asks confused of Atlanta.

AS. I was responding to CK's post in which he used "trompe d'oeil", but (mea culpa) didn't notice the mistake until you asked your question about "trompe l'oeil". I hide behind the fact that the frequent use of "trompe d'oeil" has inured me to its (probable) incorrectness. Any native/bi-lingual French speakers care to make a definitive statement?

Rod