So, I reinstalled a bunch of drivers today, including my Nvidia drivers. After doing such, I tried out a bunch of games to make sure that nothing horribly wrong happened. I played some WoW, no problems. I played some Age of Empires 3, no problems. I played some LoL, and got this. Should I reinstall LoL or what? I still can't figure out whether this is a bug with the game or what.

I'm having the same problem, I've messed with almost every possible setup minus a reinstall. Is there any way to fix this without having to reinstall?

Similar problem: attack animations like Nidalee auto spears, Cho'gath spikes, etc. are black.
The cyrstals in the nexus and inhibitors are also black.
I havent altered any drivers or what not, i simply updated the game.
It didn't ruin my game but it was weird.