There already exists a pattern modifyer called average.

For example: 

      density {
        average
        density_map {
          [1 spherical]
          [1 granite]
        }
      }
 
But it would be extremely useful to have a product
version, yielding :

      density {
        product
        density_map {
          [1 spherical]
          [1 granite]
        }
      }
 
Note a granite-spherical product would give a borderless
rendering of a flame (ie the hard border wouldn't be visible).

Or if a density_map and a color_map could be combined (which
they cannot -- see my previous note on crashes in POV 3.1b5),
then a similar affect could be achieved with the average,
but will all values of 0.5 or less mapped to zero color.

Dan

-- 
http://www.flash.net/~djconnel/

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