One drawback with rFactor is it doesn't truly support wet weather conditions so modders have to create work arounds to make it work, this is such a work around.

Tonight we raced 15 laps of Interlagos in the dark, it's amazing how little you can see when racing round these circuits, it makes it alot harder to find your braking point.

I just managed to pull out the victory, had I stopped for new tires I would have lost for sure.