"Justin Smith" <t74### [at] yahoocom> wrote in message
news:web.3d9bb34c33fc79509a66a6680@news.povray.org...

<snip>

It's a fairly common problem - one way to guarantee that your surface will be
contigineous is to deform a plane. Basically, if all you are doing is raising
bits of a plane up or down, then you will never get bits of the surface breaking
away. This does impose the same limitation as a height-field - namely that you
will never get any recesses in the surface or overhangs.

For mountains, I'd strongly recommend taking a look at ridged multi-fractals,
which are specifically designed for this.

Try something like:

#version 3.5;

#include "colors.inc"
#include "functions.inc"
global_settings { assumed_gamma 1.0}
camera {  location  <0.0, 5, -10.0>  look_at   <0.0, 0.0,  0.0>}
sky_sphere {  pigment {    wrinkles    color_map {      [0.0 rgb <0.6,0.7,1.0>]
[0.7 rgb <0.0,0.1,0.8>]    }  }}
light_source {  <0, 0, 0>   color rgb <1, 1, 1>   translate <-30, 30, -30>}

#declare MountFunc = function(x,y,z){f_ridged_mf(x,y,z,0.9, 5, 10, 0.75, 1, 0)}
#declare Mountains =
isosurface{
  function{ y - MountFunc(x,0,z)}
  contained_by{box{-5,5}}
  accuracy 0.001
  max_gradient 20
}

object{Mountains pigment{Gray50}}

Post a reply to this message