Hi all, I am trying to create a desert plain, and have been experimenting
with isosurface. I have this:

  isosurface {
    function { y+f_noise3d(x,0, z)*0.25 }
    threshold 1
    contained_by { box { -20, 20 } }
    
    pigment { Wheat }
    normal { bumps 0.3 scale 0.1 }
  }

but it appears to be out of focus up close to the camera...  Any other
ideas on how to achieve a desert plain.

By plain I dont mean a totaly flat plain, but with gentle dunes etc...

  Cheers

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