I don't know if it is the game's fault or the gl driver's. It seems they changed the smoke effect, as in the 2009 release it was fine.
Could you please attach a screenshot?
Created attachment 40971 [details] tire smoke in vdrift 2010 release with r300g on an rv350
It doesn't work with neither r300g nor llvmpipe nor swrast. I am almost sure it used to work. Could you please bisect it?
I'm sorry for this false alarm. It seems vdrift 2010-06-30 was released with insufficient testing. See: http://vdrift.net/Forum/viewtopic.php?t=1367
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