As Thorsten pointed out, the documentation says it all.
Summed up:
it allows for a visual representation of computation "intensity" of the
scene being rendered; and since it is a red/green (no blue) image it's
suggested use is for height fields, though getting a scene together for
one in this way is not exactly easy to shape if you want to form a
height field.
Other than that, I haven't seen any other uses myself.

Hassoun wrote:
> 
> Hi
> 
> i am new to povray and i would like to know about the Histogram feature:
> definition, what does it do, applications,...
> 
> thanks in advance
> 
> Hassoun

-- 
 omniVERSE: beyond the universe
  http://members.aol.com/inversez/POVring.htm
=Bob

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