Something tells me replacing the value of FSSA with non-integral values will cause a crash/the config to be regenerated. Likely, what is happening is that a call to `MaterialManager::getSingleton().setDefaultAnisotropy(int aniLevel);` or equivalent is being done at start, and it only takes an integral value for the AA level to use. Oddly enough, this also makes me believe maybe your hardware does not know how to do AA, or rather, its implementation. You did make sure to get the nvidia drivers for your card, yes? You did say your computer was pretty new, after all. In addition, you could possibly take a look at your `FH.log` to see if there are any more clues.