"triple_r" <nomail@nomail> wrote:
> "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

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.

Post a reply to this message