Finally, It was an app called raptor that i had installed and puts an overlay hud over games for social stuff, recording video, updating drivers, optimising games… it seems the app is not compatible with the game and causes the black screen you describe and the terrain generation glitches. I dont know if the developers are aware of it.
He didn´t solve it. He Just had said, that he has the Same Problem. Like me. I have bought the Game Today and I really want to Play it, but I have no Idea what I can do because of the black Terrain. I insert a Screenshot, how it looks for me.