I've seen both in-game, when playing, and some youtube videos (here for example) about how rubber is added onto the track in rF2. More laps, more rubber. After a couple of laps you don't only have the black lines in curves, but also on the straights (although not as much). One thing that I noticed though from yesterdays Formula 1 in Japan was that although you could see rubber added in the curves, you couldn't really see that on the straight lines even though there were about 20 cars running around 50 laps. On the straights the line was actually lighter than the rest of the track due to lack of particles and other dirt. Is there too much rubber added in rF2? PS. I consider myself a rookie when it comes to car sports and sim games, so I may be way off . DS.