But it's a good "warning sign". Everytime you see that green smoke you know that someone just drove out of the track.
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With Kege's Smokemod the grass dust looks even more ridiculous:
http://koti.mbnet.fi/kegetys/lfs/shots/tex_smoke3.jpg
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Get Smokemod here: http://koti.mbnet.fi/kegetys/lfs/. It's great for screenshots but you can't really drive with this mod. Even the smoke dust is so dense that you can't see shit.