I don't believe the shuttle was built with any forced perspective. True forced perspective only works from a limited set of angles and you don't use it for a mockup you'll be shooting from all kinds of directions. Furthermore, while the height of the fuselage tapers towards the back, the width of the craft increases slightly in inverse relation, and most of this is completely unnoticeable when you're up close to the mockup. Sometimes a cigar is just a cigar.
Maybe I misunderstood how you said this.
The design of the craft widens in height and
width from front to back.