Nathan Kopp wrote:
> 

> If you comment out "smooth" in your height field, the white dots go away.  I
> don't yet know exactly what causes them.

If you don't comment out "smooth" and increase scale:

height_field
{ pattern 300, 300
  { hf_gray_16
    granite color_map { [0 rgb 0][1 rgb 1] }
    scale .8 //<--- changed from 0.5
  }
  smooth
  pigment
  { granite color_map { [0 rgb <1,.7,.3>][1 rgb <.8,.5,.1>] }
    scale .5
  }

then there are a lot less of these white dots. 

Antti

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