Jan Dvorak <jan### [at] centrumcz> wrote:
> Hello,
> when using +am2 (recursive antialiasing), are the corner samples shared 
> between their respective pixels, that is, is +am2 as fast as +am1 or is 
> it four times slower if no antialiasing takes place? Are the edge 
> samples reused?

  I actually don't know the exact details of the antialiasing algorithm
used, but I have the impression that no samples are shared between pixels
in either method. This is because antialiasing can be jittered, and if
that's the case, most samples wouldn't be at pixel edges and thus difficult
to share. (I have to admit, though, that I can think of variations where
samples can be jittered *and* shared between pixels. However, I don't know
exactly what POV-Ray is doing.)

-- 
                                                          - Warp

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