A hint for the demo of GC1:
First export as 16bit raw. Then import and convert that in PS or another image software into 16bit tif.

About GeoControl2:
GeoControl2 is in developement. The next step will be to enable GeoControl to create close up "terrains", means cuts of the basic terrain, which fits seamlesssly into the basic terrain.
This will make it possible to get ultrarealistic details in the foreground, even sharp flows from a flowmap.
At time xpleet is correct, for close ups the details of only one 4096*4096 terrain are not enough and you get more or less smoothed and washed out details.