I suppose so, but wouldn't that end up rotating the "reflected object" as well?
At least that's what happened when I gave it a try. Are you suggesting splitting the reflection from the object itself and then rotating the "reflection layer"?
Or would you have to have two versions of the object that you want reflected, do the reflection on one, rotate it, and then remove the actual object from that and merge with the other one?
I guess the question is, could you have something that was perfectly vertical, and then still have the reflection come at an angle?