That's more or less the idea behind Perlin noise. Start with a low frequency high amplitude smooth function, then sum it together while increasing the frequency

That's more or less the idea behind Perlin noise. Start with a low frequency high amplitude smooth function, then sum it together while increasing the frequency and decreasing the amplitude. See here for more: http://freespace.virgin.net/hugo.elias/models/m_perlin.htm http://freespace.virgin.net/hugo.elias/models/m_perlin.htm