Hi to all,
To keep users constantly up to date I've decided to upload as soon as possible every FIX I made after discovered an important BUG.
I've discovered another bug into the terrain editor:
The creation of a new detail terrain material didn't work.
Now it has been fixed :)
Also I've updated the FBX importer with the latest ASSIMP library.
The following is an animated GIF showing how to create a detail material for the terrain:
http://www.s2powered.com/copiasito/wp-content/uploads/2017/11/HOWTO_create_terrain_detail_material.gif