Sub Surface Noise, is a unique feature in DEM Earth, which lets you fill the interpolated space between height samples, with a world wide homogeneous noise layer, and a realtime, real world noise value. With this feature, you can effectively reduce the grid like sample characteristics that you get when you view a data set beyond its limits.
Sub Sample Noise at 1 meter
Sub Sample Noise at 2 meters
Without Sub sample Noise
Textured without Sub Sample Noise
Textured With Sub Sample Noise
Polygonized Scene WITH Sub surface Noise