A few oriented Gabor kernels — gaussian-windowed cosines whose envelopes slowly orbit the plane — sum into an anisotropic field, and 65,536 GPU particles follow its iso-contour tangents so they comb into long hair/thread-like filaments instead of an isotropic swirl. Colour tracks the local field orientation so separate bundles glow in different hues; drag to rotate the kernels, drag vertically to add or remove them.