 For the sequences where Shah Jahan kept looking at the Taj Mahal  from his chamber, a miniature model of the Taj was created to get  the right perspective for the actor and the cameramen. The difficult  part was calculating the distance between the Agra fort and the Taj,  as that would determine the Tajs size as seen by Shah Jahan. There  was an idea to use the original Taj Mahal, but the idea was scrapped  due to the difficulty of finding locations. Besides, in the film the  Taj is newly built and shining white, whereas currently the Taj, due  to age and acid rain, has a distinct yellowish hue.