Comment # 22 on bug 98761 from Arek Ruśniak

Created attachment 128180 [details]
witcher2_r287854

so, it's resolved ground's problem for me, the movie is not looking perfect but
this is not problem of this bug report i think. 

Marek, Matt I don't know what do you talking about but maybe you are looking
for:
https://bugs.freedesktop.org/show_bug.cgi?id=98238 
there is big visual differences between mesa 12.0.4 vs 13.0 ...work in
progress:)