While the sidney opera house matches nearly perfect, there's again the same like Cam mentioned before: You can't draw the sidney opera house in another way, and there are only a few perspectives. But still . Would be nice if someone did it for the DLC. If i have time, i'll maybe somewhen in the next time try the same for Civ4. Just to see a comparison, if anything has changed in between, or if this is the normal procedure.