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Warp <war### [at] tag povray org> wrote...
> If the function is applied in a pixel-by-pixel basis, regardless of the
> other pixels, why can't it be done on the fly, as someone else suggested?
> It would certainly save lots of memory and/or disk space usage.
However, limiting filters to a single pixel of data greatly limits the
functionality. Almost all photoshop filters (including relatively simple
ones of the "filter factory" type) use access multiple pixels at a time.
-Nathan
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