There are at least two functions which are useful for building mountain 
ranges: f_hetero_mf() and especially f_ridged_mf(). You can /add/ those 
to your Terrain_Function.

Thomas




> Hi(gh)!
>
> I started designing an isosurface planet for my "Port Whatmough" city
> project... the land-sea ratio is quite what I aimed at, also the
> planet-wide elevation range (deepest point of the ocean ~-7500 m,
> highest mountain on land ~7200 m), but I wanted broader low plains
> (green in the cylindrical map generated from the isosurface) and
> mountain areas (orange to brown) mostly as ranges rather than massive
> plateaus.
>
> Is it a matter of careful mixing pigment functions, e. g. using average?
> Which additional functions would you recommend?
>

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