Hello Veleno,
I am using VirtualPlanetBuilder/osgdem to build large scale terrain database.
http://www.openscenegraph.org/index....planet-builder
https://github.com/openscenegraph/VirtualPlanetBuilder
I tried loading the generated model in Inspector. These were my observation
osgt [only terrain]: loads in inspector and displays correctly
osgt [terrain+texture]: the region covered by texture is not displayed properly
osgb/ive : fails to load in inspector
However all of these models load perfectly in OpenSceneGraph 3.4.1 .