Perlin Noise - Improvement

• Gradient Noise
• • Use pseudo-random Gradients instead of Positions
  • Improved frequency control: Oscillate at period 1

• Simplex Noise
• • Simplex-based interpolation instead of grid interpolation
  • Avoids grid-direction artifact
  • Faster for high dimensions
  • • Stefan Gustavson Simplex noise demystified

• To go beyond:
  A Lagae et al., STAR in Procedural Noise Functions. EG 2010