I should have mentioned (and would have, if I hadn't then [as I am now] been posting from a friend's PC using the unbelievably crappy keyboard HP somehow thought appropriate to bundle with this overpriced machine), but my initial approach was to use a custom sky-sphere with the panoramic cityscape mapped to it. Unfortunately -- in addition to posing orthorectangular projection issues really didn't feel like addressing at the time -- that approach placed the cityscape visually at the horizon, when in reality it belongs more in the midground.
(It also seems to have something to do with relative elevation, as objects at a higher elevation than the camera's POV came across more authentically on the skysphere than did those at the same or lower elevations.) But Ok is certainly correct: Using the skysphere is both the simplest and the most flexible (in that eye lines in any direction are supported without scenery having to be adjusted) solution.
And I really hate this keyboard -- it's like the designer was nostalgic for the days of the PCjr.
