Four fractal terrain algorithms compared by their top-down wire-frame renderings. In clockwise order: Diamond/Square (Midpoint displacement improvement), Perlin noise, Iterative fault-line, and a texture map read from a greyscale image. 

Four fractal terrain algorithms compared by their top-down wire-frame renderings. In clockwise order: Diamond/Square (Midpoint displacement improvement), Perlin noise, Iterative fault-line, and a texture map read from a greyscale image.