//------------------<<<< grid macro
#macro Raster(RScale, RLine)
pigment{gradient x
        scale RScale
        color_map{
        [0.000   color rgbt<0,0,0,0>]
        [0+RLine color rgbt<0,0,0,0>]
        [0+RLine color rgbt<1,1,1,1>]
        [1-RLine color rgbt<1,1,1,1>]
        [1-RLine color rgbt<0,0,0,0>]
        [1.000   color rgbt<0,0,0,0>]
        }}
#end // of macro
//-----------------------------------
box{<0,0,0>,< 2,0.1,2>
    texture{
      pigment{color rgb<1,1,1>*1.3}}
    texture{ Raster( 1.0, 0.045)
             scale 0.25}
    texture{ Raster( 1.0, 0.045)
             scale 0.25
             rotate<0,90,0>}
    rotate<0,0,0>
    scale 2
    rotate<5,0,0>
    translate<-1.0,1.5,-1.5>}
//-------------------------- end ----