Attached Link: http://www.terrasource.net

One last post here- this shows WILBUR and it's TERRAGEN export dialog. Both WILBUR and 3DEM can export Terragen files. I've found that WILBUR's is better- plus offers a re-size option if you want to go straight out to a 4K x 4K file.

However- I believe Terragen still does the BEST job in its own 16 bit data space as far as re-scaling goes. And again, I would hope that E-ON will impliment a True 16 bit data import function into the Vue Terrain Editor and perhaps even have a direct TER file import.

Above is the link to MASSIVE amounts of Terragen data and info which leads to where to find TER files- if you don't already know where and what they are.