R*公布的GTA4两版本特效水平
Rockstar told us that the equivalent vehicle density featured on the console versions would have been just 33 per cent
vehicle density选项，主机版是 33(PC最高100）
Render Quality
Medium settings are recommended for most users and will provide filtering beyond what the console versions can execute.
Render Quality 选项调成中等效果就就比主机版好（就是说主机版是low）
View Distance
A setting of 22 or more will provide PC users an enhanced experience over the console versions.
View Distance 选项调成 22 (PC最高100） 效果就比主机版好（就是说主机版22以下）
Detail Distance
A setting of 10 would be the equivalent to the performance on a console.
Detail Distance调成10(PC最高100）就能有完全和主机版一样的表现
Shadow Density
These shadows are exclusive to the PC version and can have a major impact on CPU and GPU performance.
某些阴影PC版特有，调成1(PC最高16）以上就能更好
