NoiseQuality

Generates coherent noise quickly. When a coherent-noise function with this quality setting is used to generate a bump-map image, there are noticeable "creasing" artifacts in the resulting image. This is because the derivative of that function is discontinuous at integer boundaries.

Generates standard-quality coherent noise. When a coherent-noise function with this quality setting is used to generate a bump-map image, there are some minor "creasing" artifacts in the resulting image. This is because the second derivative of that function is discontinuous at integer boundaries.

Generates the best-quality coherent noise. When a coherent-noise function with this quality setting is used to generate a bump-map image, there are no "creasing" artifacts in the resulting image. This is because the first and second derivatives of that function are continuous at integer boundaries.