Introduction Many gamers, when tweaking their graphics settings, come across options like Texture Filtering, Bilinear Filtering, and Anisotropic Filtering. Most people crank them up to maximum without really knowing what they do — or why turning them down makes distant floors shimmer and fences show strange flickering patterns. If you dig deeper, you’ll find that these settings sit on top of a complete mathematical framework — the same one behind the Fourier transforms and convolution you might have seen in a signals and systems course.