gsc.wildcat a flag/register that tells iOS 4.0 an later devices how to handle opengles-2 graphics
On an iPhone 3G/s it’s disabled an this sets the Power VR chipset to do fullscreen antialiasing with a lower texture resolution
On an iPad an iPhone 4 it’s enabled an this disables the fullscreen antialiasing an sharpens textures for the higher res displays.
If u enable it on a 3G it does nothing as the Power VR chipset only supports opengles-1 an wildcat is a opengles-2 extension
If u enable it on a 3Gs it makes the textures look sharper on some games but does real bad mip mapping in the distance an also disables full screen antialiasing.
If u disable it on an iPad or iPhone 4 it does the opposite it adds fullscreen antialiasing bit lowers texture sharpness.