Matt, did they fix the square shadows bug with AMD CHS?
And your 1st screenshot of the game(not the settings) looks horrible. That electricity post/tower at the back looks really bad, truck grill looks crap as well. Jaggies all over the place. The rest of the screens look great.
Also I noticed you did not have view distance set to max. Any reason for that? I never had any issues with performance when having everything maxed out, except MSAA. With 2 GPUs
I guess FXAA does not work on those areas, but it's something i don't notice when driving around. I might give MLAA a shot to see if that works with GTA, it might do a better job fixing those than FXAA.
I didn't increase view distance any further as it indicated i would exceed the memory limit, but if it works fine then I'll max it out.
