http://bugs.winehq.org/show_bug.cgi?id=21525
--- Comment #8 from Ruslan b7.10110111@gmail.com 2010-01-30 08:52:38 --- OK, i found why you might not be able to reproduce this. When FSAA is not forced for nvidia drivers, this problem doesn't exist. So, to reproduce:
__GL_FSAA_MODE=8 wine gta_sa
or, just set FSAA settings to override application settings and some non-zero smoothing in nvidia-settings.