The map starts displaying like this from the very beginning:
Everything seems darkened, and you can only make out some outlines and a flickering effect. It's impossible to play like this.
I've been messing around with the video settings in the game, changing them, running it in windowed mode, but nothing seems to help.
The game itself is a licensed version, and I've already completed all the campaigns, and I've never experienced anything like this before.
Does anyone know how to fix this problem?