This issue started a little while ago, not sure on the cause but it could be after I updated the nvidia drivers.
What happens is that all the unit textures are dark, so it looks like everything is standing in a shadow or something. It doesn't affect map textures only units.
I used to get this symptom when I alt-tab'd out of the game and came back in but now it seems perminant. It's not a major issue but it makes it very hard to spot the demon assasin during battles.
