Have the same kind of effect with cloud when I use my laptop.
I haven't been able to get rid of the effect.
However, the laptop only has sis650 graphics, so I'm not holding much hope. I do get FR that are playable however (mid 30's).
It would be nice to be able to disable weather to alleviate the problem, although I have no idea how big of a task that would be (or even if it is possible).
Jaystang, go off line and load a map that doesn't have any weather ( try the dueling arena map). I think what you are seeing is cloud not being rendered properly, as I am.
Fortunately for me, I only use the laptop when I'm on the road.
Any ideas Skuzzy?
cheers,
RTR