Dave VanHorn wrote:

> I made a floor of boards,
> 
> #declare Floor = object { union { object { Board1  translate <-15, 0, 0>}
>                                   object { Board2  translate <-12, 0, 0>}
>                                   object { Board3  translate < -9, 0, 0>}
>                                   object { Board4  translate < -6, 0, 0>}
>                                   object { Board5  translate < -3, 0, 0>}
>                                   object { Board6  translate <  0, 0, 0>}
>                                   object { Board7  translate <  3, 0, 0>}
>                                   object { Board8  translate <  6, 0, 0>}
>                                   object { Board9  translate <  9, 0, 0>}
>                                   object { Board10 translate < 12, 0, 0>}
>                                   object { Board11 translate < 15, 0, 0>}
>                                 }
>                           scale <0.5, 1, 1>
>                         }
> 
> Each board has the same texture, but slid back and forth so that they don't look
> like "clones".


You can also use a repeat warp to get the same effect on a single floor object.

Nice example with a brick wall:
http://www.shipbrook.com/jeff/raytrace/bricks.html

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