Q15: How are fractal mountains generated?  
A15: Usually by a method such as taking a triangle, dividing it into 3  
subtriangles, and perturbing the center point. This process is then repeated  
on the subtriangles. This results in a 2-d table of heights, which can then  
be rendered as a 3-d image. One reference is:  
  
1. M. Ausloos, _Proc. R. Soc. Lond. A_ 400 (1985), pp. 331-350.  
  

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