That's actually not quite Perlin noise either. In Perlin noise, you set each grid point to a unit gradient vector, and then interpolate between them with a spe

That's actually not quite Perlin noise either. In Perlin noise, you set each grid point to a unit gradient vector, and then interpolate between them with a specific equation. This gives it useful mathematical properties, like being continuously differentiable, so the surface normals are smooth when you render it. That's not guaranteed with value noise. http://webstaff.itn.liu.se/~stegu/TNM022-2005/perlinnoiselinks/perlin-noise-math-faq.html http://webstaff.itn.liu.se/~stegu/TNM022-2005/perlinnoiselin...