For a scene i would like to include a floor.
Therefore is modified the superellipsoid  example.
Running this whitout the #macro and #end the schene renders perfect

[code]
#macro Floor(MaxTile, MaxRow)
#declare Offset = 2.1;

  #declare Tile = superellipsoid { <0.5, 0.1>
    scale <1, .05, 1>
  }

#declare Row = union {
    object { Tile }

#declare index =-MaxTile;

#while(index <= MaxTile)
    object { Tile translate z*Offset*index }
#declare index = index + 1;
#end
  }

#declare index = -MaxRow;

  union{
    object { Row }

#while(index <= MaxRow)
    object { Row translate x*Offset*index }
#declare index = index + 1;
#end

    pigment { White_Marble }
    finish { phong 1 phong_size 50 reflection .35 }
  }

  plane {
    y, 0  //this is the grout
    pigment { color White }
    finish { ambient .4 diffuse .7 }
  }
#end
[/code]

But if i call it as a macro like object{Floor(10,10) } it produces a error at
the plane command. It puzzles me how this is possible. Anny help is welcome.

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