Hi,

I am trying to generate grassy hills and was planning on using GrassTex for
grass. When I render the scene without the macros it renders OK (with a
dumb grass texture I have come up  with) but when I try to use the macros,
I just get the sky. What am I doing wrong?

// Hills v0.6
// Date: October 2005
// Auth: Murat Erenturk


//global_settings { assumed_gamma 2.2 }

#include "colors.inc"
#include "grasstexgrasstex.inc"


#declare C_Sun=<204,162,124>/255;
#declare C_SkyTop=rgb <29,88,228>/255;
#declare C_SkyBottom=rgb <179,249,247>/255;
#declare C_Grass1=rgb <94,130,32>/255;
#declare C_Grass2=rgb <88,120,19>/255;


/*%%% LIGHTS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/

light_source{<100,100,-100> color White}

/*%%% SKY %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
sky_sphere {
    pigment {
          gradient z
         turbulence 0.01
        color_map{
            [0.1 color C_SkyTop ]
            [0.7 color C_SkyBottom]
        }
    scale 2
    translate -1
        }
}


/*%%% Camera %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
camera{
        location <10,0,-1.5>
        look_at <10,5,0>
      }

/*%%% GRASS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
#declare gt_height = 1.0;
#declare camera_location = <1,0,-.15>;


/*%%% TERRAIN %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
#declare Terrainbase=height_field{
        "hills_dat"
        smooth
        rotate <90,0,0>
        translate <0,1,0>
        scale <20,10,5>

}
#declare Terrain = object{
    Terrainbase

    texture {
             pigment{color Green
                     turbulence 1
                    scale 0.01
                    }
             normal { bumps 1 scale 0.05 }
             }
}
object{Terrain
//    gt_ground()
//    gt_grass()
//    gt_flowers()

}

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