Currently for large terrains the rendition is forcibly coarse at the ground level, and hi-res sculptures can not be treated as casual objects into a scene.
Wether the mesh is updating on demand or on camera movement, if at all is secondary to the power of the primary feature.
scratched below, I seem to have missed some improvements already !
Also, please consider changing output:
Doing subdivision level 4... | Done.
instead of
Building scene... | Done.
