"A Beppo Shader," Silas murmured. "You know the cost?"
Most shaders rely on Perlin noise or Simplex noise—smooth, gradient, predictable. Beppo wrote his own noise function, now unofficially dubbed "Brandt Noise" (after the developer's favorite cigarette brand, according to legend).
Drop the .zip file into your shaderpacks folder inside your .minecraft directory.