I was working at an architectural design facility in San Francisco last year called Screen Point and we worked on an autocad revit 3D Studio Max Pipeline and had a lot of trouble with large textured aerial photographs.
We compressed the aerials with WavGen ECW and could import these very large files and render them with no problems. Just thought I would let everyone know cause it made the whole process so much easier and saved me a lot of time.
Check out the Wavgen website.