at first you must installed RA3 with crossover games, then use "
run command"
in crossover games to run "
regedit"
to open registry, set
HKEY_CURRENT_USER/Software/Wine/Direct3D/useGLSL = "
enabled"
and HKEY_CURRENT_USER/Software/Wine/Direct3D/offscreenRenderingMode = "
fbo"
. then reboot
