David Vincent-Jones wrote:
> 
> I have been putting a perspective grid in my scene that floats just clear of
> the floor.
> I use it as a visual measuring tool in the final image.
> Currently I have used a grid composed of small cylinders but find that the
> processing time is substantial and I am looking for an alternate idea.
> Has anybody made a similar grid?

You might try a crossing gradient on a very thin box instead.
Something untested like this:

       box { -1,1
   texture {
   pigment { gradient x 
 color_map {
             [.45 rgbf 1][.45 rgb 1][.55 rgb 1][.55 rgbf 1]
           }
             scale .1
           }
    finish { ambient 1 diffuse 0 }
           }
   texture {
   pigment { gradient z 
 color_map {
             [.45 rgbf 1][.45 rgb 1][.55 rgb 1][.55 rgbf 1]
           }
             scale .1
           }
    finish { ambient 1.5 diffuse 0 }
           }
             scale <20,.1,20>
           }

-- 
Ken Tyler -  1200+ Povray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/

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