Keeping in the Iso theme. I came up with this by playing with the (new to me
Mega Pov). If used at the right angle it can give a fair facsimile of
diamond tread type flooring. It is very memory friendly (this scene 256k
ram) and if you use the no_shadow  keyword for the isosurface is very fast
to render. Well anyway if someone needs it here it is (just adjust scale of
the box and bounding box of the isosuface to meet your needs.

isosurface
  {
     function {"mesh1",<0.5,0.5,.5,0.025,1>}
     bounded_by{ box {<-100,.05, -100>,<100,.07,100>}}
     threshold 0.05
     eval
      pigment {color Gray50}
      /*no_shadow*/    /*just uncomment out to speed things up*/
     rotate 45*y
  }


box
{
  <-100,.03, -100>
  < 100,.05,100>
  pigment {color Gray50}
  rotate 45*y
}

Buke

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