2004.02.11 18:39 "RE: [Tiff] Photoshop 8.0 and libtiff", by Don Ellis
I have just finished some testing using libtiff with the only tsize_t changed to a 64 bit signed integer and have been able to compress and uncompress images between 2GB and 4GB. To break the 4 GB barrier, I think you are correct that it will take a 64 bit computer. There may be something that I am missing, but I have not found it yet. I will keep testing and keep you informed.