"Kenneth" <kdw### [at] earthlinknet> wrote:
> This is nice little tool.
>
> The only thing that's missing (not from the standpoint of your code, though) is
> that POV's blur doesn't *seem* to take into account the 'hyperfocal distance'
> of a real lens. I.e., I think that the amount of blur on either side of the
> in-focus plane progresses linearly in and out from that point (when it should
> do so non-linearly? At least on the +z side of that sharp plane, to 'stretch
> out' the amount of blur there--over a longer distance--in order to match the
> qualities of a real lens.) I could be wrong about this, but it's been my own
> experience, visually.

I'm not sure I agree.  POV-Ray's lens model is consistent with a thin-lens
approximation, and should simulate all of the appropriate physics.  Even with
the nonlinear effects though, it should be roughly linear close to the focal
point.

 - Ricky

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