https://bugs.kde.org/show_bug.cgi?id=412061

Ahab Greybeard <ahab.greybe...@hotmail.co.uk> changed:

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--- Comment #7 from Ahab Greybeard <ahab.greybe...@hotmail.co.uk> ---
The Lanczos3 filter is known to produce 'ringing' on sharp edges despite being
'generally good'.

I'm sure this was explained in the manual in a list of filter/interpolation
options for the general case but I can now only find one reference to it in
Scene Linear painting:

"Speaking of filters, when using the transform tool, you should also avoid
using lanczos3, it’ll give a weird black halo to sharp contrasts in
scene-linear."

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