"Edouard Poor" <pov### [at] edouardinfo> wrote:
> I agree with Ricky - while the POV focal blur system has it's flaws, I think it
> gets the actual blur amount in front of and behind the focal plane correct.

I have to confess that this comes from experience.  I actually wrote a raytracer
once to simulate the projection of a scene onto a piece of film with a thin
lens.  Once I completed this, I realized it was entirely equivalent to
POV-Ray's simplified model.

 - Ricky

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