I did not save the actual setup, but rebuild again.
Anybody understands what special by this setup?
The output of the "surface layer" and the outside connected "disp"
should be the same.
The actual size of the intended mountain is 1523 meters.
The size of the intended incremental intended mountain is 1601 m.
The intention was to make a smooth levitation between the two.
An error in the displacements, a constant of 41 must added