I've had this problem before with games. There is a small area around your character that renders textures and shadows in higher quality. It contrasts horribly with the areas borders. NOT an anisotropic filtering issue. Made a video that might show it better.
https://www.youtube.com/watch?v=4dVJRo68dTo
https://www.youtube.com/watch?v=4dVJRo68dTo