// ground ----------------------------------
// settings of squared plane dimensions
// -- Strichabstand:
#declare RasterScale = 1.0;
// -- Strichbreite:
#declare RasterHalfLine  = 0.05;
// -- dito in z Richtung
#declare RasterHalfLineZ = 0.05;
// -- Stichfarbe:
#declare Raster_Color = <1,1,1>*0.2;
//------------------------------------------
#macro Raster(RScale, HLine)
       pigment{
           gradient x scale RScale
           color_map{
            [0.000   color rgb Raster_Color]
            [0+HLine color rgb Raster_Color]
            [0+HLine color rgbt<1,1,1,1>]
            [1-HLine color rgbt<1,1,1,1>]
            [1-HLine color rgb Raster_Color]
            [1.000   color rgb Raster_Color]
            }// end of color_map
           }// end of pigment
 #end// end of Raster(RScale, HLine)-macro
//-------------------------------------------

union{
plane{ <0,1,0>, 0  } //---------------

height_field{
       tga "MountLo1.tga"
       smooth
       double_illuminate
       translate<-0.5,-0.001,0>
       scale<150,15,150>
     } // end of height_field ---------------

// Raster mit überlagerten Texturen:
// 1. -- Hintergrund Textur
 texture{ pigment{color White*1.1}}
// 2. -- überlagerte Streifen
 texture{ Raster(RasterScale,RasterHalfLine )}
 texture{ Raster(RasterScale,RasterHalfLineZ)
                           rotate<0,90,0>}
}// end of union
//end of squared plane+mountain -----