Wasn't it Hershel Robinson who wrote:
>Why does the following code generate a:
>Warning: Unnecessary bounding object removed.
>for each tile in the road?  (POV-Ray 3.5 beta 6)
>
>Thanks,
>Hershel

Because the bounded_by's are unnecessary. The scene renders faster if
you replace

            bounded_by { box { <J,-30,I>, <J+TileSize,0,I+TileSize> } }
            clipped_by { bounded_by }

by
            clipped_by { box { <J,-30,I>, <J+TileSize,0,I+TileSize> } }


and replace

            bounded_by { box { <J+TileSize,-30,I+TileSize>,
<J+TileSize*2,0,I+TileSize*2> } }
            clipped_by { bounded_by }

by

            clipped_by { box { <J+TileSize,-30,I+TileSize>,
<J+TileSize*2,0,I+TileSize*2> } }

I.e. get rid of the bounds and just clip.

-- 
Mike Williams
Gentleman of Leisure

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