Following on from the discussion in povray.general, here's an image using 
the slope pigment with the direction vector pointing at the camera:

texture{
    pigment {
      slope {
      <-3,0,1>
      }
      color_map {
        [0.00 color rgbt <1,1,1,0> ]
        [0.10 color rgbt <1,1,1,0> ]
        [0.15 color rgbt <1,1,1,0.8> ]
        [0.65 color rgbt <1,1,1,1> ]
        [1.00 color rgbt <1,1,1,1> ]
      }
    }
    finish{ ambient 10 }
  }

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Attachments:
Download 'makehuman.jpg' (36 KB)

Preview of image 'makehuman.jpg'

You forgot the key stuck in the throat...  ;)

    That's cool though. I'll have a play with it thanks.

    ~Steve~

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