In speaking with another modder, this is how Giants has fixed the issue of people having poor FPS. Essentially, when you computer is being worked hard by the game, instead of taking an FPS hit, the game downgrades textures to improve performance and save FPS. That's why players always say, "Why do my textures look so bad when my FPS is fine?" Giants, my friend, Giants. Only way around it is to reduce your graphics settings.